7UT633.-.B...-.... - Siemens

SIPROTEC

Differential Protection

7UT613/63x

V4.60

Manual

C53000-G1176-C160-2

Preface

Introduction 1

Functions 2

Mounting and Commissioning 3

Technical Data 4

Appendix A

Literature

Glossary

Index

7UT613/63x Manual

C53000-G1176-C160-2

Disclaimer of Liability

We have checked the text of this manual for conformity w ith the

hardware and software described. However, since deviations

cannot be ruled out entirely, we do not accept liability for com-

plete conformity or for any any errors or omissions.

The information given in this document is reviewed regularly and

any necessary corrections will be included in subsequent edi-

tions. We appreciate any suggestions for improvement.

We reserve the right to make technical improvements without

notice.

The reproduction, transmission or use of this document or its con-

tents is not permitted without express written authority . Offenders

purposes of patent application or trademark registration.

Registered Trademarks

SIPROTEC, SINAUT, SICAM and DIGSI are registered trade-

marks of SIEMENS AG. Other designations in this manual might

be trademarks whose use by third parties for their own purposes

would infringe the rights of the owner.

Document Version: 4.60.04

37UT613/63x Manual

C53000-G1176-C160-2

Preface

Purpose of this

Manual This manual describes the functions, operation, installation, and commissioning of the

7UT613/63x devices. In particular, one will find:

• Informatio n rega r din g th e co nfig u ra tio n of the de vice and de scr ipt i ons of device

functions and settings → Chapter 2;

• Instruction for mounting and commissioning → Chapter 3,

• List of technical data → Chapter 4;

• As well as a compilation of the most significant data for experienced users → Ap-

pendix A.

General information abo ut design, configuration, and opera tion of SIPROTEC 4

devices are laid down in the SIPROTEC 4 System Description /1/.

Target Audience Protection en gin eer s, co mm iss i on ing engineers, personnel concerned with adjust-

ment, checking, and service of selective protective equip ment, automatic and contro l

facilities, and personnel of electrical facilities and power plants.

Applicability of this

Manual This manual is valid for: SIPROTEC 4 Differential Protection 7UT613/63x; firmware

version V4.60.

Indication of Con-

formity

This product is UL-certified according to the Technical Data:

This product complies with the directive of the Council of the European Commu-

nities on the approximation of the laws of the Member States relating to electro-

magnetic compatibility (EMC Council Directive 89/336/EEC) and concerning elec-

trical equipment for use within specified voltage limits (Low-voltage directive 73/23

EEC).

This conformity has been proved by tests conducted by Siemens AG in accor-

dance with Article 10 of the Council Directive in agreement with the generic stan-

dards EN 61000-6-2 and EN 61000-6-4 (for EMC directive) and the standard

EN 60255-6 (for low-voltage directive).

This device was designed and produced for industrial use.

The product conforms to the international standards of the series IEC 60255 and

the German standard VDE 0435.

Further Standards IEEE Std C37.90-*

Preface

47UT613/63x Manual

C53000-G1176-C160-2

Additional Support Should further information on the SIPROTEC 4 System be desired or should particular

problems arise which are not covered sufficiently for the purchaser's purpose, the

matter should be referred to the local Siemens representative.

Training Courses Individual course offerings may be found in our T raining Catalogue, or questions may

be directed to our training centre in Nuremberg.

WARNING!

When operating an electrical device, certain parts of the device inevitably have dan-

gerous voltages.

Death, severe personal injur y or subst antial pr op erty d ama ge can r esult if the device

is not handled properly.

Only qualified personnel shall work on and around this equipment. It must be thor-

oughly familiar with all warnings and safety notices of this manual as well as with the

applicable safety regulations.

The successful and safe ope ration o f this device is depe ndent on proper handling, in-

stallatio n, operation, and maintenance by qua lified personnel under observan ce of all

warnings and hints contained in this manual.

Of particu lar importance a re the general inst allation and safety re gulations for work in

a high-voltage environment (for example, ANSI, IEC, EN, DIN, or other national and

international regulations). These regulations must be observed.

Instructions and

Warnings The warnings and no tes contained in this manual serve for your own safety and for

an appropriate lifetime of the device. Please observe them!

The following indicators and standard definitions are used:

DANGER

indicates that death, severe personal injury or substantial property damage will

result if proper precautions are not take n.

Warning

indicates that death, severe personal injury or substantial property damage can

result if proper precautions are not take n.

Caution

indicates that minor personal injury or proper ty damage can resu lt if proper precau -

tions are not t aken. This particularly app lies to damage on or in the device itself and

consequential damage thereof.

Note

indicates information about the device or respective part of the instruction manual

which is essential to highlight.

Preface

7UT613/63x Manual

C53000-G1176-C160-2

Deviations may be permitted in dra wings and tables when the type of designator can

be obviously derived from the illustration.

The following symbols are used in dra wings:

Definition QUALIFIED PERSONNEL

For the purpose of this instruction ma nual and p roduct labels, a qu alified person is

one who is familiar with the installation, construction and operation of the equipment

and the hazards involved. In addition, he has the following qualifications:

• Is trained and auth orized to energize, de-energize, clear, ground and tag cir cuits

and equipment in accordance with established safe ty pr ac tice s.

• Is trained in the proper care and use of protective equipm ent in accordance with

established safety practices.

• Is trained in rend e rin g firs t ai d.

Typographic and

Graphical Conven-

tions

To designate terms which refer in the text to informatio n of the device or for the

device, the following fonts are used:

Parameter names

Designators of configuration or fun ction parameters which may appear word-for-

word in the display of the device or on the screen of a personal computer (with

DIGSI), are marked in bold letters of a monospace font. The same goes for the titles

of menus.

1234A

Parameter addre sses have the same ch aracter style as p arameter names. Param-

eter addresses in overview table s contain the suff ix A, if the parameter is only avail-

able using the option Display additional settings.

Parameter Conditions

Possible settings of text parameters, which may appear word-for-word in the

display of the device or on the screen of a personal computer (with operation soft-

ware DIGSI), are additionally written in italics. The same goes for the op tions of the

menus.

„Annunciations“

Designators for information, which may be output by the relay or required from other

devices or from the switch gear, are marked in a monosp ace type style in quotation

marks.

Device-internal logical input signal

Device-internal (logical) output signal

Internal input signal of an analog quantity

External binary input signal with number (binary input, input

indication)

External binary output signal with number (device indication)

Preface

67UT613/63x Manual

C53000-G1176-C160-2

Besides these, graphical symbols are used according to IEC 60617-12 and IEC

60617-13 or symbols derived from these standards. Some of the most frequently used

are listed below:

■

External binary output signal with number (device indication)

used as input signal

Example of a parameter switch designated FUNCTION with

the address 1234 and the possible settings ON and OFF

Input signal of an analog quantity

AND gate

OR gate

Exclusive OR (antivalence): output is active, if only one of

the inputs is active

Coincidence gate (equivalence): output is active if both

inputs are active or inactive at the same time

Dynamic inputs (edge–triggered) above with positive, below

with negative edge

Formation of one analog output signal from a number of

analog input signals

Limit stage with setting address and parameter designator

(name)

Timer (pickup de lay T, example adjus table) wi th se ttin g

address and parameter designator (name)

Timer (dropout delay T, example non-adjustable)

Dynamic triggered pulse timer T (monoflop)

Static memory (RS-flipflop) with setting input (S), resetting

input (R), output (Q) and inverted output (Q)

77UT613/63x Manual

C53000-G1176-C160-2

Contents

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1.1 Overall Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

1.2 Application Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1.3 Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2 Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.1.1 Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.1.1.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.1.1.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.1.1.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

2.1.2 EN100-Modul 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.1.2.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.1.2.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2.1.2.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.3 Configuration of the Functional Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.3.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

2.1.3.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2.1.4 Power System Data 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.1.4.1 Topology of the Protected Object . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2.1.4.2 General Power System Data (Power System Data 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

2.1.4.3 Assignment of Protection Functions to Measuring Locations / Sides . . . . . . . . . . . . . . . . . 79

2.1.4.4 Circuit Breaker Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

2.1.4.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

2.1.4.6 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

2.1.5 Setting Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

2.1.5.1 Setting Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

2.1.5.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.1.5.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.1.5.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.1.6 Power System Data 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.1.6.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

2.1.6.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

2.1.6.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Contents

87UT613/63x Manual

C53000-G1176-C160-2

2.2 Differential Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

2.2.1 Functional Description of the Differential Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

2.2.2 Differential Protection for Transformers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

2.2.3 Differential Protection for Generators, Motors, and Series Reactors. . . . . . . . . . . . . . . . . 121

2.2.4 Differential Protection for Shunt Reactors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

2.2.5 Differential Protection for Mini-Busbars and Short Lines. . . . . . . . . . . . . . . . . . . . . . . . . . 123

2.2.6 Single-phase Differential Protection for Busbars. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

2.2.7 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

2.2.8 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

2.2.9 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

2.3 Restricted Earth Fault Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

2.3.1 Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

2.3.2 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

2.3.3 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

2.3.4 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

2.3.5 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

2.4 Time Overcurrent Protection for Phase and Residual Currents. . . . . . . . . . . . . . . . . . . . . 150

2.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

2.4.1.1 Definite Time, Instantaneous Overcurrent Protection (UMZ). . . . . . . . . . . . . . . . . . . . . . . 150

2.4.1.2 Inverse Time Overcurrent Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

2.4.1.3 Manual Close Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

2.4.1.4 Dynamic Cold Load Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

2.4.1.5 Inrush Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

2.4.1.6 Fast Busbar Protectio n Using Reverse Interlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

2.4.2 Time Overcurrent Protection for Phase Currents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

2.4.2.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

2.4.2.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

2.4.2.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

2.4.3 Time Overcurrent Protection for Residual Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

2.4.3.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

2.4.3.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

2.4.3.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

2.5 Time Overcurrent Protection for Earth Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

2.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

2.5.2 Definite Time, Instantaneous Overcurrent Protection (UMZ). . . . . . . . . . . . . . . . . . . . . . . 179

2.5.3 Inverse Time Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

2.5.4 Manual Close Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

2.5.5 Dynamic Cold Load Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

2.5.6 Inrush Restraint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

2.5.7 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

2.5.8 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

2.5.9 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Contents

7UT613/63x Manual

C53000-G1176-C160-2

2.6 Dynamic Cold Load Pickup for Time Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . 191

2.6.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

2.6.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

2.6.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

2.6.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

2.7 Single-Phase Time Overcurrent Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

2.7.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

2.7.2 High-impedance Differential Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

2.7.3 Tank Leakage Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

2.7.4 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

2.7.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

2.7.6 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

2.8 Unbalanced Load Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

2.8.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

2.8.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

2.8.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

2.8.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

2.9 Thermal Overload Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

2.9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

2.9.2 Overload Protection Using a Thermal Replica . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

2.9.3 Overload protection using a thermal replica with ambient temperature influence. . . . . . . 223

2.9.4 Hot-Spot Calculation and Determination of the Ageing Rate . . . . . . . . . . . . . . . . . . . . . . 223

2.9.5 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

2.9.6 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

2.9.7 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

2.10 RTD-Boxes for Overload Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

2.10.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

2.10.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

2.10.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

2.10.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

2.11 Overexcitation Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

2.11.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

2.11.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

2.11.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

2.11.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

2.12 Reverse Power Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

2.12.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

2.12.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

2.12.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

2.12.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

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2.13 Forward Power Supervision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

2.13.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

2.13.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251

2.13.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

2.13.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

2.14 Undervoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

2.14.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

2.14.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

2.14.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

2.14.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

2.15 Overvoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

2.15.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

2.15.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

2.15.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

2.15.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

2.16 Frequency Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

2.16.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

2.16.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

2.16.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

2.16.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

2.17 Circuit Breaker Failure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

2.17.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

2.17.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

2.17.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

2.17.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

2.18 External Trip Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

2.18.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

2.18.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

2.18.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

2.18.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

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2.19 Monitoring Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

2.19.1 Measurement Supervision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

2.19.1.1 Hardware Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279

2.19.1.2 Software Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

2.19.1.3 Monitoring of Measured Quantities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

2.19.1.4 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

2.19.1.5 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

2.19.1.6 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

2.19.2 Trip Circuit Supervision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

2.19.2.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

2.19.2.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

2.19.2.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

2.19.2.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

2.19.3 Malfunction Responses of the Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

2.19.3.1 Summary of the most important Monitoring Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

2.19.4 Parameterisation Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

2.20 Protection Function Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

2.20.1 Pickup Logic for the Entire Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

2.20.1.1 General Device Pickup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

2.20.2 Tripping Logic for the Entire Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

2.20.2.1 General Tripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

2.21 Disconnection of Measuring Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

2.21.1 Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

2.21.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

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2.22 Additional Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

2.22.1 Processing of Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

2.22.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

2.22.1.2 Operational Annunciations (Buffer: Event Log) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

2.22.1.3 Fault Annunciations (Buffer: Trip Log). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

2.22.1.4 Spontaneous Annunciations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

2.22.1.5 General Interrogation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

2.22.1.6 Switching Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

2.22.2 Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

2.22.2.1 Display and T ransmission of Measured Valuables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

2.22.2.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

2.22.2.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

2.22.3 Thermal Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

2.22.3.1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

2.22.3.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

2.22.4 Differential and Restraining Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

2.22.4.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

2.22.4.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

2.22.5 Set Points for Measured Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

2.22.5.1 User Defined Set-Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

2.22.6 Energy Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

2.22.6.1 Energy Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

2.22.6.2 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

2.22.7 Flexible Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

2.22.7.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

2.22.7.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

2.22.7.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

2.22.7.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

2.22.8 Oscillographic Fault Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

2.22.8.1 Function Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

2.22.8.2 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

2.22.8.3 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

2.22.8.4 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

2.22.9 Commissioning Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

2.22.9.1 Web Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327

2.23 Average Values, Minimum and Maximum Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

2.23.1 Demand Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.1.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.1.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.2 Min/Max Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.2.1 Setting Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

2.23.2.2 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

2.23.2.3 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

2.24 Command Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

2.24.1 Control Authorization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

2.24.1.1 Type of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

2.24.1.2 Sequence in the Command Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

2.24.1.3 Interlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

2.24.1.4 Recording and Acknowledgement of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

2.24.1.5 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338

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3 Mounting and Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

3.1 Mounting and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

3.1.1 Configuration Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

3.1.2 Hardware Modifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

3.1.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

3.1.2.2 Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346

3.1.2.3 Switching Elements on Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

3.1.2.4 Interface Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364

3.1.2.5 Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

3.1.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

3.1.3.1 Panel Flush Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369

3.1.3.2 Rack and Cubicle Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

3.1.3.3 Panel Surface Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 372

3.1.3.4 Removing the Transport Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

3.2 Checking Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374

3.2.1 Checking Data Connections of Serial Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374

3.2.2 Checking the System Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377

3.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

3.3.1 Test Mode / Transmission Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380

3.3.2 Test Time Synchronisation Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380

3.3.3 Testing the System Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381

3.3.4 Checking the switching states of the binary Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . 383

3.3.5 Checking the Setting Consistency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 385

3.3.6 Secondary Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389

3.3.7 Circuit Breaker Failure Protection Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

3.3.8 Symmetrical, Primary Current Tests on the Protected Object. . . . . . . . . . . . . . . . . . . . . . 397

3.3.9 Zero Sequence Current Tests on the Protected Object. . . . . . . . . . . . . . . . . . . . . . . . . . . 404

3.3.10 Current Tests for Busbar Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409

3.3.11 Checking for the No n-assigned Single-phase Current Inputs . . . . . . . . . . . . . . . . . . . . . . .411

3.3.12 Checking the Voltage Connections and Polarity Check . . . . . . . . . . . . . . . . . . . . . . . . . . 412

3.3.13 Testing User-defined Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417

3.3.14 Stability Check and Triggering Os cillographic Recordings . . . . . . . . . . . . . . . . . . . . . . . . 418

3.4 Final Preparation of the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420

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4 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421

4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422

4.1.1 Analogue Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422

4.1.2 Auxiliary Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422

4.1.3 Binary Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423

4.1.4 Frequency Measur ement via the Positive Phase-sequence Voltage U1. . . . . . . . . . . . . . 424

4.1.5 Communications Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425

4.1.6 Electrical Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430

4.1.7 Mechanical Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432

4.1.8 Climatic Stress Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 432

4.1.9 Service Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 433

4.1.10 Constructional Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

4.2 Differential Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435

4.3 Restr icte d ea rt h fa ult pr ot ection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441

4.4 Time Overcurrent Protection for Phase and Residual Currents. . . . . . . . . . . . . . . . . . . . . 442

4.5 Time Overcurrent Protection for Earth Current (Starpoint Current) . . . . . . . . . . . . . . . . . 453

4.6 Dynamic Cold Load Pickup for Time Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . 455

4.7 Single-Phase Time Overcurrent Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 456

4.8 Unbalanced Load Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 457

4.9 Thermal Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

4.10 RTD Boxes for Overload Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 468

4.11 Overload Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 469

4.12 Reverse Power Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471

4.13 Forward active power supervision. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472

4.14 Undervoltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474

4.15 Overvoltage Protection (ANSI 59) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475

4.16 Frequency Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476

4.17 Circuit Breaker Failure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478

4.18 External Trip Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479

4.19 Monitoring Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 480

4.20 User-defined Functions (CFC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481

4.21 Flexible Protection Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485

4.22 Additional Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 487

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4.23 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491

4.23.1 Panel Surface Mounting (Enclosure Size 1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491

4.23.2 Panel Surface Mounting (Enclosure Size 1/1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491

4.23.3 Panel Surface and Cabinet Mounting (Enclosure Size 1/2) . . . . . . . . . . . . . . . . . . . . . . . . 492

4.23.4 Panel Surface and Cabinet Mounting (Enclosure Size 1/1) . . . . . . . . . . . . . . . . . . . . . . . . 493

4.23.5 RTD box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494

A Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495

A.1 Ordering Information and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496

A.1.1 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496

A.1.1.1 Differentia l Protection 7UT613 for 3 Measuring Locations . . . . . . . . . . . . . . . . . . . . . . . . 496

A.1.1.2 Differential Protection 7UT633 and 7UT635 for 3 to 5 measuring locations . . . . . . . . . . . 499

A.1.2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502

A.2 Terminal Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505

A.2.1 Panel Flush and Cubicle Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505

A.2.2 Panel Surface Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 514

A.3 Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523

A.3.1 Current Transformer Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523

A.3.2 Voltage Transformer Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 536

A.3.3 Assignment of Protection Functions to Protected Objects . . . . . . . . . . . . . . . . . . . . . . . . 538

A.4 Current Transformer Requireme nts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 539

Current Transformer in accordance with BS 3938/IEC 60044-1 (2000) . . . . . . . . . . . . . . 540

Current Transformer in accordance with ANSI/IEEE C 57.13. . . . . . . . . . . . . . . . . . . . . . 540

A.5 Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

A.5.1 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

A.5.2 Binary Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

A.5.3 Binary Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 543

A.5.4 Function Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 544

A.5.5 Default Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545

A.5.6 Pre-defined CFC Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547

A.6 Protocol-dependent Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 548

A.7 Functional Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549

A.8 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 552

A.9 Information List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 582

A.10 Group Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 615

A.11 Measured Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 617

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Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 631

Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 623

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 633

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Introduction 1

Differential ProtectionThe SIPROTEC 4 device 7UT613/63x is introduced in this chap-

ter . You are presented with an overview of t he scope of application, the properties and

functional scope of the 7UT613/63x.

1.1 Overall Operation 18

1.2 Application Scope 21

1.3 Characteristics 23

1 Introduction

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1.1 Overall Operation

The digital differential protection devices SIPROTEC 4 7UT613/63x are equipped with

a powerful microprocessor system. This provides fully numerical processing of all

functions in the device, from the acquisition of the measured values up to the output

of commands to the circuit breakers

Figure 1-1 Hardware structure of the digital differential current protection relay 7UT613/63x

— Example of a 7UT613 for a three-winding transformer with measuring loca-

tions M1, M2 and M3, with 3 auxiliary 1-ph ase inputs X1, X2 and X3

Analogue Inputs The analogue inputs (AI) transform the currents and voltages derived from the instru-

ment transfo rm e rs an d m atc h th em to the internal signal levels for processing in the

device. Depending on the version, the device features between 12 current inputs

(7UT613/7UT633) and 16 current input s (7UT635 ). Three current inputs are provided

for the input of the phase currents at each end of the protected zone (= measuring

points), further measuring inputs (= additional inputs) may be used for any desired cur-

rent, e.g. the earth current measured between the starpoint of a transformer winding

1.1 Overall Operation

7UT613/63x Manual

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and earth, or other single-phase measuring currents. One o r two additional inputs can

be designed for highly sensitive curr ent detection, This, for example, allows the detec-

tion of small tank leakage currents of power transformers or - with an external series

resistor - the det ec tio n of a vo ltage (e.g. for high-impedance unit protection).

The versions 7UT613 and 7UT633 can be ord ered with 4 additio nal volt age inp ut s. 3

of these inputs can be connected to the phase-to-earth voltages. Another voltage input

can be used for a sing le-ph ase voltage, such as a displacement voltag e or any othe r

voltage. In principle, the differential protection is designed such that it can operate

without measured voltages. However, the integrated overexcitation protection uses

the measuring voltage to calculate the induction in transformers or shunt reactors. In

addition, the measuring voltages and the quantities derived from them (induction,

power, power factor) can be displayed, annunci ated and/or monitore d by the device if

the voltages are connected.

The analogue signals are then routed to the input amplifier group “IA”.

The input amplifier group IA provides high-resistance termination for the analogue

input quantities and cont ains filters tha t are optimised for measured value pro cessing

with regard to bandwidth and processing speed.

The analogue-to-digital (AD) stage consists of a multiplexor, an analogue-to-digital

(A/D) converter and memory compone nts for th e transmission of digit al signals to the

microcomputer system.

Microcomputer

system In addition to the control of the measured values, the actual protection and control

functions are processed in the µC microcomputer system. In particular, the following

is included:

• filtering and conditioning of measured signals

• continuous monitoring of measured signals

• monitoring of the pickup conditions of the individual protective functions

• Conditioning of the measured signals: i.e. conversion of currents according to the

connection grou p of the protecte d transforme r (when used for transformer d if feren-

tial protection) and matching of the current amplitudes.

• formation of the differential and restraint quantities

• calculation of the RMS values of the currents for overload detection and adjustment

of the temperature ri se of the protected object

• retrieval of threshold values and time sequences

• processing of signals for the logic functions

• Processing User -defined Logic Functions

• reaching trip command decisions

• Check of control commands and output to switching devices

• storage of indications, fault data and fault values for fault analysis purposes

• Calculation and display/annunciation of measured values an d the quantities

derived from the m

• management of the opera ting system and its functions, e.g . data storage, real- time

clock, communication, interfaces, etc.

The information is provided via output amplifier OA.

1 Introduction

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Binary Inputs and

Outputs Binary inputs and outputs from and to the computer system are routed via the I/O

modules (input s a nd ou tput s). T he computer system ob t ains the informatio n from th e

system (e.g remote resetting) or from other devices (e.g. blocking co mmands). These

outputs inclu de, in particular, trip commands to switchgear and signals for re mote a n-

nunciation of imp o rtant events and cond itio ns.

Front Elements Devices with operator panel have light emitting diodes (LEDs) and a display screen

(LCD) on the front p ane l to prov ide informa tion such as measur ed value s, messages

related to events or faults, status, and functional status..

Integrated control and numeric keys in conjunction with the LCD facilitate local inter-

action with the 7UT6. All information of th e device can be accessed using the integrat-

ed control and numeric keys. The information includes protective and control settings,

operating and fault messages, and measured values.

In addition, control of circuit breakers and other equipment is possible from the 7UT6

front panel.

Version 7UT613 provides a 4-line LC display in front, while versions 7UT633 and

7UT635 have a graphic displa y. The latter also has a key switch and a control key for

on-site control of the device.

Serial interfaces V ia the serial operator interface in the front panel, communication with a personal

computer using the operating program DIGSI is possible. This facilitates a comfortable

handling of all device functions.

A serial service interface can likewise make communicatio n via PC with the device

possible by using DIGSI. This port is especially well suited for the fixed wiring of the

devices to the PC or operation via a modem .

All data can be transferred to a central control or monitoring system via the serial

system port. This interface may be provided with various protocols and physical

transmission schemes to suit the particular application.

A further interface is provided for the time synchronization of the internal clock via

external synch ro ni zation sources.

Further communication protocols can be realized via additional interface modules.

The service port, or an optional additional interface, can also be used to connect a

RTD-Box (= resistance temper ature detector) for entering external temperatures (e.g.

for overload protection).

Power Supply The functional unit s describe d are supplied b y a power supply PS with the necessary

power in the different voltage levels. Transient dips of the supply voltage, which may

occur during short-circuit in the power supply system, are bridged by a capacitor (see

also Technical Data).

1.2 Application Scope

7UT613/63x Manual

C53000-G1176-C160-2

1.2 Application Scope

The numerical differential protection SIPROTEC 4 7UT613/63x is a fast and selective

short-circuit protection for transformers of all voltage l evels, for rotating machines, for

series and shunt reactors, or for short lines and mini-busbars with 2 to 5 feeders (de-

pending on the version). It can also be used as a single-phase protection for busbars

with up to 9 or 12 feeders (depending on the version). The individual application can

be configured, which ensures optimum matching to the protected object.

The device is also suited for two-phase connection for use in systems with 16.7 Hz

rated frequency.

A major advant age of the dif ferential protecti on principle is the instan t aneous tripping

in the event of a short-circuit at any point within the entire protected zone. The current

transformers limit th e protected zo ne at the ends towa rds the network. Thi s rigid limit

is the reason why the differential protection scheme shows such an ideal selectivity.

For use as transformer protection, the 7UT613/63x is normally connected to the

current transformer sets which limit the power transformer windings against the re-

mainder of the system. The phase displacement and the interlinkage of the currents

due to the winding connection of the transformer are matched in the device by calcu-

lation algorithms. The earthing conditions of the starpoint(s) can be adapted to the

user's requirements and are automatically considered in the matching algorithms.

Also, the currents from multiple measuring poin ts on one side of the protected object

can be combined.

For use as generator or motor pr otection, the 7UT613/63x compares the currents in

the starpo int leads of the machine and at it s terminals. Simila r applies for series reac-

tors.

Short lines or mini-b usbars with 3 to 5 end o r feeders (de pending on the version) can

be protected as well. "Short" means that the current transformers lead between the

CTs and the device do not form an impermissible burden for the CTs.

For transformers, generators, motors, or shunt reactors with earthed starpoint, th e

current between the starpoint and earth can be measured and used for highly sensitive

earth fault protection.

The 9 or 12 measured curr ent inputs (depending on the version) of the device allow

for a single-phase protection for busbars with up to 9 o r 12 feeders. One 7UT613/63x

is used per phase in this case. Alternatively, (external) sum m a tion tra ns fo rm e rs ca n

be installed in order to allow a busbar protection for up to 9 or 12 feeders with one

single 7UT613/63x relay.

Where not all analog measuring inputs are needed for the measured values of the pro-

tected object, the r emainin g input s can be used for other, independent measurem ent

or protection tasks. If a 7UT635 (with 3 three-phase measuring inputs) is used, for in-

stance, on a three-winding transformer, the two remaining measuring inputs ca n be

used for overcurrent protection of a different protected object, e.g. the auxiliaries

system circuit.

One or two additional current inputs designed for very high sensitivity ar e also avail-

able. They may be used e.g. for detection of small leakage currents between the t ank

of transformers or reactors an earth, thus recognising even high-resistance fau lts.

High-resistance voltage measurement is also possible using an external series resis-

tor.

For transfo rm e rs (in clu din g au to -t ra ns formers), generators, and shunt reactors, a

high-impedance unit protection system can be formed using high-impedance earth

fault protection. In this ca se, the curre nt s of all curr ent transformers ( of equal de sign)

1 Introduction

22 7UT613/63x Manual

C53000-G1176-C160-2

at the ends of the protected zone feed a common (external) high-ohmic resistor The

current in this resistor is measur ed using a high-sensitive current input 7UT613/63x.

The device provides backup time overcurrent protection functions for all types of pro-

tected objects. The functions can be enabled for any side or measuring location.

A thermal overload protection function is av ailable for any type of machine. The func-

tions can be enabled fo r any side. External detectors account for the coolant temper-

ature (by means of an external RTD-box). This allows to calculate and outpu t the hot-

spot temperature and the relative ageing rate.

An unbalanced load protection function is provided for the detection of unsymmetrical

currents. Phase failures and negative sequence currents, which are especially dan-

gerous for rotating machines, can thus be detected.

Performance functions allow devices with voltage measuring inputs to implement a

reverse power protection or monitor the forward power supply(in the power station

sector). In the system they can be used for network decoupling. Power results and

their components can be emitted as measured values.

The versions with voltage inputs are provided with an integrated overexcitation protec-

tion for the detection of excessive induction states in shun t rea ct ion s (tr an sformers,

shunt reactors). This protection function monitors the ratio U/f, which is proportional to

the induction B in the iron core. An imminent iron core saturation, which can occur es-

pecially in power st ations following (full) load shut down and/or frequency reductio n, is

thus detected.

An undervoltage and overvolta ge protection is to be integrated into devices with

voltage measuring inputs. A 4-stage frequency protection monitors the frequency from

the measured voltages.

A version for two-phase application is available for traction supply (transformers or

generators) which provides all functions suited for this application (differential protec-

tion, restricted earth fault protection, overcurrent protection, overload protection).

With 7UT613/63x two circuit-breaker failure protection functions can be realised. A

circuit-breaker failure protection ch ecks th e r eaction of on e circu it breaker a fter a trip

command. It can be assigned to any of the sides of a protected object.

More protection, supe rvision and measuring function s can be configured with flexible

functions. Up to 12 of these functions can be specified; the measured quantities you

want to process and which reactions the device is to trigger when under/overshoo ting

adjustable limit values. With that you can create time overcurrent protection and

process voltages, power or symmetrical components of measured quantities.

One can configure the calculation of minimum, maximum and/or average values

and/or minimum, maximum of the average values of up to 20 selectable measured

quantities, thus receiving one's own statistical data.

1.3 Characteristics

7UT613/63x Manual

C53000-G1176-C160-2

1.3 Characteristics

General Features • Powerful 32-bit microprocessor system.

• Complete dig ital measur ed valu e pr o ces sin g an d co nt ro l, f rom th e sam p ling an d

digitalization of the analogue input quantities to the initiation of outputs for tripping

or closing circuit breakers.

• Complete galvanic and reliable separation between the in ternal processing circuits

of the device and the external measurement, control, and power supply circuits

because of the design of the analog input transducers, binary input and output mod-

ules, and the DC/DC or AC/DC converters.

• Suitable for power transformers, generator, motors, reactors, or smaller busbar ar-

rangements, as well as for multi-terminal lines and multi-winding transformers

• Easy device operation through an integrated operator panel or by means of a con-

nected personal computer running DIGSI.

Transformer Differ-

ential Protection • Current restraint tripping characteristic

• Restraint feature against high inrush currents with 2nd harmonic

• Restraint feature against transient and steady-state fault currents caused e.g. by

overexcitation of transformers, using a further harmonic (3rd or 5th harmonic)

• Insensitivity to DC components and current transformer saturation

• High level of stability even with different degrees of current transformer saturation

• High-speed instantaneous trip in case of high-current transformer faults

• Adjustable to the conditioning of the starpoint(s) of the power trans fo rm e r

• Increased earth-fault sensitivity during detection of the ground current of an earthed

transformer winding

• Integrated matching of the transformer connection group

• Integrated match ing of the tr ansfo rmatio n ratio including different rated currents of

the transformer windings

Differential Protec-

tion for Genera to rs

and Motors

• Current restraint tripping characteristic.

• High sensitivity

• Short tripping time

• Insensitivity to DC components and current transformer saturation

• High level of stability even with different degrees of current transformer saturation

• Independent of the conditioning of the starpoint

Differential Protec-

tion for Mini-

Busbars and Short

Lines

• Tripping characteristic with current restraint

• Short tripping time

• Insensitivity to DC components and current transformer saturation

• High level of stability even with different degrees of current transformer saturation

• Monitoring of the current connections with operation currents

1 Introduction

24 7UT613/63x Manual

C53000-G1176-C160-2

Busbar Protection • 1-phase differ ential protection for a busbar with up to 9 or 12 feeders (depending

on the version)

• Either one relay per phase or one relay connected via interposed summation

current transformers

• Tr ipp in g ch ar acteristic with cur re n t res t rain t

• Short tripping time

• Insensitivity to DC components and current transformer saturation

• High level of stability even with different degrees of current transformer saturation

• Monitoring of the current connectio ns with operation currents.

Earth Fault Differ-

ential Protection • Earth fault protection for earthed transformer windings, generators, motors, shunt

reactors, or starpoint formers

• Short command duration

• High sensitivity for ea rt h fau l ts within the pr ot ec ted z one

• High stability against external earth faults using the magnitude and phase relation-

ship of through-flowing earth current.

• 2 earth-fault differential protection functions possible

High-impedance

Unit Protection • Highly sensitive fault current detection using a common (external) burden resistor

• Short tripping time

• Insensitive against DC components and current transformer saturation

• High stability with optimum matching

• Suitable for earth fault detection on earthed generators, motors, shunt reactors, and

transformers, including auto-transformers, with or without earthed starpoint.

• Suitable for any voltage mea surement (via the resistor curre nt) for application of

high-impedance unit protection

Tank Leakage Pro-

tection • For transformers or reactors the tank of which is installed isolated or with high re-

sistance

• Monitoring of the current flowing between the tan k and ground

• Can be connected via a „normal“ current input of the device or the special highly

sensitive current input (3 mA smallest setting).

Time Overcurrent

Protection for

Phase Currents and

Residual Current

• T wo definite time delayed overcurrent stages for each of the phase currents and the

residual (threefold zero sequence) current, can be assigned to any of the sides of

the protected ob j ec t or to any me a su rin g po int

• Additionally, one inverse time de layed over cur rent stage for each of the phase cur-

rents and the residual current

• Selection of various inverse time characteristics of different standards is possible,

alternatively a us er def ine d ch ar ac te rist ic can be specified

• The stages can be combined as desired, different characteristics can be selected

for phase currents on the one hand and the residual current on the other

• External blocking facility for any stage (e.g. for reverse interlock i ng)

1.3 Characteristics

7UT613/63x Manual

C53000-G1176-C160-2

• Instantaneous tripping possible at any stage when closing onto a short-circuit

• Inrush restraint using the second harmo nic of the measured current

• Dynamic switchover of the time overcurrent protection settin gs, e.g. during cold-

load sta rt-up of the power plant

• 3 time overcurrent protection functions for phase currents and residual current

Time Overcurrent

Protection for Earth

Current

• Two definite time delayed overcurrent stages for the earth current, e.g. current

between starpoint and earth

• Additionally, one inverse time delayed overcurrent stage for the earth current

• Selection of various inverse time characteristics of different standards is possible,

alternatively a user defined characteristic can be specified

• The three can be combined as desired

• External blocking facility for any desired stage (e.g. for reverse interlocking)

• Instantaneous trip when switching on a dead fault with any desired st age

• Inrush restraint function with 2nd harmonic

• Dynamic switchover of the time overcurrent parameters, e.g. during cold-loaded

start- up of the power plant

• 2 time overcur rent pro tection function s ar e po ssib le for ea rt h cu rre n t

1-phase Overcur-

rent Protection • Two definite time delayed overcurrent stages which can be combined as desired

• For any 1-phase overcurrent detection

• Can be assigned to the „normal “1-phase current input or to the highly sensitive

current in put

• Suitabl e for detection of very sma ll current (e.g. for h igh-impedance u nit protection

or tank leakage protection)

• Suitable for detection of any desired AC voltage using an external series resistor

(e.g. for high-impedance unit protection)

• External blocking facility for any stage

Unbalanced Load

Protection • Evaluation of the negative sequence system of the three ph ase currents of any

desired sid e of the pr ot ec te d ob j ec t or an y thr ee - ph ase measurin g po int

• Two definite time delayed negative sequence current stages and one additional

inverse time delayed negative sequence current stage

• Selection of various inverse time characteristics of different standards is possible,

alternatively a user defined characteristic can be specified

• The stages can be combined as desired.

• Trip blocking on detection of broken wire

• Thermal characteristic with adjustable negative sequence factor and adjustable

cooldown time.

1 Introduction

26 7UT613/63x Manual

C53000-G1176-C160-2

Thermal Overload

Protection • Thermal replica of current-initia ted heat losses

• True RMS current calculation

• Can be assigned to any desired side of the protective object

• Adjustable thermal warning stage

• Adjustable current warning stage

• With or without including the amb ient or coolant temperatur e (by means of external

resistance temperature detector via RTD-box)

• Alternative evaluation of the hot-spot temperature according to IEC 60354 with cal-

culation of the reserve power and ageing rate (by means of external resist ance tem-

perature dete cto r via RTD-box)

• 2 breaker failure pr otection funct ion s po ssib le

Overexcitation Pro-

tection (device with

voltage measure-

ment inputs)

• Processing of the voltage/frequency ration U/f, which represents the induction B of

a shunt reactance (transformer, shunt reactor)

• Adjustable warning and tripp ing stage (with indepe ndent delay time)

• Inverse standard characteristic or user-defined trip characteristic for calculation of

the thermal stress, selectable

Reverse Power Pro-

tection (Device with

Voltage Measure-

ment Inputs)

• Real power calcul ation from positive sequence components

• Short operating time or exact calculation of the active power via 16 cycles

• Exact real power calculation for small power factor by compensating the error angle

of the measuring locations

• Insensitive to power fluctuations

• Short-time stage with external criteria, e.g. with closed emergency tripping

Forward Power

Monitoring (devic-

es with measuring

voltage inputs)

• Real power calcul ation from positive sequence components

• Supervisio n of overvolt age (P>) or unde rvolt age ( P<) of power with individually ad-

justable power limits

• Short operating time or exact calculation of the active power via 16 cycles

• Automatic blocking of stage P< for recognised measured voltage failure or wire

break in CT secondary circuit

Undervoltage Pro-

tection (Device with

Voltage Measure-

ment Inputs)

• Two-stage three-phase undervoltage measurement

• Evaluation of positive sequence component of the connected voltages, therefore in-

dependent of asymmetries

• Automatic blocking for measuring voltage failure

• Adjustable dropout ratio

Overvoltage Pro-

tection (Device with

Voltage Measure-

ment Inputs)

• Two-stage three-phase overvoltage measurement

• Evaluation of the larg est of the three phase-to-grou nd voltages or the large st of the

three phase-to-phase voltages (largest of the three phase-to-phase voltages (can

be set)

• Adjustable dropout ratio

1.3 Characteristics

7UT613/63x Manual

C53000-G1176-C160-2

Frequency Protec-

tion (devic e s wit h

measured voltage

inputs)

• Three underfr equency stages and one overfrequency stage

• Frequency measurement via the positive sequence component of the voltages

• Insensitive to harmonics and abrupt phase angle changes

• Adjustable undervoltage threshold

Circuit Breaker

Failure Prote ction • With monitoring of current flow through each breaker pole on any side of the pro-

tected object

• Supervision of the breaker position possible (if breaker auxiliary contacts or feed-

back signal available)

• Initiation by each of the internal protection functions

• Start by external trip functions possible

• Single-stage or two-stage

• Short dropout and overshoot times

• 2 breaker failure protection functions are possible

External Direct Trip • Tripping of either circuit breaker by an external device via binary inputs

• Inclusion of external commands into the intern al processing of information and trip

commands

• With or without trip time delay

• 2 breaker failure protection functions possible

Processing of ex-

ternal information • Inclusion of external signals (user defined information) in internal information pro-

cessing

• Pre-defined transformer annunciations for Buchholz protection and oil gassing

• Transmission to output relays, LEDs, and via serial system interfaces to central

control and data storage facilities

Flexible Functions • Up to 12 individually configurable protection or monitoring functions

• Input quantities can be selected from all the connected 3-phase or 1-phase mea-

sured quantities

• Also possible from the measured or combined in put quantities: symmetrical compo-

nents, power components, frequ ency

• Standard logic with supervision of the input quantities to over/undershooting of an

adjustable limit value

• Settable time and dropout delay

• External blocking via „Blocking on Measured Quantities Failure“ parameterisable

• Editable message texts

• Additional determination and output of up to 20 mean values from me asured quan-

tities or calculated values

• Additional determination and output of up to 20 mean values from me asured quan-

tities or calculated values

1 Introduction

28 7UT613/63x Manual

C53000-G1176-C160-2

User-defined Logic

Functions (CFC) • Freely programmable combination of internal and external signals for the imple-

mentation of user-defined logic functions

• All usual logic functions

• Time delays and limit value inquiries

Commissioning,

Operation • Isolation of one side or measuring point for maintenance work: the isolated line or

measuring point is withdrawn from the differential protection system processing,

without affecting the remainder of the protection system

• Comprehensive support facilities for operation an d commiss ioning

• Indication of all measured values, amplitudes and phase relation

• Indication of the calculated diffe rential and restraint currents

• Integrated help tools ca n be visualised by means of a stand ard browser: Phas or di-

agrams of all curre nts of all sides and m easuring locations of the protected object

are displayed as a gra ph.

• Connection and direction checks as well as interface check

Monitoring Func-

tions • Availability of the device is greatly increased because of self-monitoring of the inter-

nal measurement circuits, power supply, hardware, and software

• Supervision of the current transformer secondary circuits of symmetry and phase

sequence

• Monitoring of the voltage transformer circuits (if voltage inputs are available) for

symmetry, voltage sum and phase rotation

• Supervision of the voltage transformer circuits (if voltage inputs are available) for

voltage failure with fast function blocking that measure undervoltages

• Checking the consistency of protection settings reg arding the protected object an d

possible assignment of the curr ent inputs: Blocking of the differential protection

system in case of inconsistent settings which could lead to a malfunction

• Trip circuit supervision is possible.

• Broken wire supervision for the secondary CT circuits with fast phase segregated

blocking of the dif fer entia l protection fun ctions and the unbalanced lo ad protection

in order to avoid spurious tripping.

Further Functions • Battery-buffered real-time clock, which may be synchronised via a synchronisation

signal (e.g. DCF77, IRIG B via satellite receiver), binary input or system interface

• Continuous calculation and display of operational measured values on the front of

the device; indication of measured quantities of all sides of the protected object

• Fault event memory (trip log) for the last 8 network faults (faults in the power sys-

tem), with real-time assignment

• Fault recording memory and transmission of the data for analogue and user-defined

binary signals with a maximum time range of about 5s

• Switching Statistics: Recording of the trip commands issued by the device, as well

as recording of the fa ult curr en t da ta and accumu la tio n of th e int er ru pt ed fau l t cur -

rents

1.3 Characteristics

7UT613/63x Manual

C53000-G1176-C160-2

• Communication with ce ntral control and dat a storage equipment possible via ser ial

interfaces (depending on the individual ordering variant) by means of data cable,

modem or optical fibres Various transmission protocols are provided for this pur-

pose.

■

1 Introduction

30 7UT613/63x Manual

C53000-G1176-C160-2

317UT613/63x Manual

C53000-G1176-C160-2

Functions 2

This chapter describes the individual functions available on the SIPROTEC 4 device

7UT613/63x. It shows the setting possibilities for each function in maximum configu-

ration. Guidelines for establishing setting values and, where required, formulae are

given.

Additionally, on the basis of the following information, it may be defined which

functions are to be used.

2.1 General 33

2.2 Differential Protection 104

2.3 Restricted Earth Fault Protection 138

2.4 Time Overcurrent Protection for Phase and Residual Currents 150

2.5 Time Overcurrent Protection for Earth Current 179

2.6 Dynamic Cold Load Pickup for Time Overcurrent Protection 191

2.7 Single-Phase Time Overcurrent Protection 196

2.8 Unbalanced Load Protection 206

2.9 Thermal Overload Protection 220

2.10 RTD-Boxes for Overload Detection 232

2.11 Overexcitation Protection 239

2.12 Reverse Power Protection 245

2.13 Forward Power Supervision 250

2.14 Undervoltage Protection 255

2.15 Overvoltage Protection 259

2.16 Frequency Protection 263

2.17 Circuit Breaker Failure Protection 268

2.18 External Trip Commands 276

2.19 Monitoring Functions 279

2.20 Protection Function Control 294

2.21 Disconnection of Measuring Locations 297

2.22 Additional Functions 300

2 Functions

32 7UT613/63x Manual

C53000-G1176-C160-2

2.23 Average Values, Minimum and Maximum Values 329

2.24 Command Processing 332

2.1 General

7UT613/63x Manual

C53000-G1176-C160-2

2.1 General

A few seconds after the device is switched on, the default display appears on the LCD.

In the 7UT613/63x the measured values are displayed.

The function parameters, i.e. settings of function options, threshold values, etc., can

be entered via the fron t panel of the device or by me ans of a PC connected to the op-

erator or service interface of the device utilising DIGSI. Password No. 5 is required to

modify individual settings. Operation via DIGSI is described in the SIPROTEC system

description /1/ .

In this section you make the basic decisions regarding the proper interaction between

your substation, its measuring points, the analogue device connections and the

various protective functions of the device. Because of the comprehensive range of

features provided by the devic es of the 7UT613/63x family , this section is quite exten-

sive. The device is portrayed here as completely as possible with regard to the system

to be protected together with its measuring points, i.e. the current and voltage trans-

formers, and wh at ef fect s ar e to be expected of the protective functions of the device.

In a first step (Section 2.1.3) you should specify what type of plant component you

want to protect, since the sc ope of additional featur es of fered d epends on the type o f

the main protected ob ject. Moreover you have to decide which protective functions

you want to use, because not all of the functions integrated in the device are neces-

sary, useful or even possible for any relevant case of application.

In the next step (section 2.1. 4), you d escribe the top ology of the protec ted object. i.e.

the arrangement of the protected object, its sides (windings for transformers, sides for

generators/motors, ends for lines, feeders for busbars), and the measuring locations

which will provide the respective measured values.

After entering some General Powe r System Data (frequency, phase sequence), you

inform the device in section 2.1.4 of the properties of the main protected object. Object

properties include the ratings and (in the case of transformers) the starpoint treatment,

vector group and, where applicable, the auto-transformer winding.

Subsection 2.1.4 also deals with the CT data which must be set to ensure that the

current s acquired at the vario us measuring locations are evaluate d in the d evice with

the correct scale factor.

The above information is sufficient to describe the protected object to the device's

main protect i on fun ctio n , i.e. the different ial pr ote c t ion . Fo r th e oth e r pr ot ect i on

functions, you select in section 2.1.6 the measured values which will be processed by

you and in which way.

The same section 2.1.6 provides informa tion with regard to how to set the circuit

breaker dat a, and finding o ut about setting groups and how to use them. Last but not

least, you can set general data which are not dependent on any protection functions.

2 Functions

34 7UT613/63x Manual

C53000-G1176-C160-2

2.1.1 Device

2.1.1.1 Setting Notes

The parameters for the tripping logic of the entire device and the circuit breaker test

have already been set in section 2.1.4.

Address 201 FltDisp.LED/LCD also decides whether the alarms that are allocated

to local LEDs and the spontaneous displays that appear on the local display after a

fault should be displayed on every pickup of a protection function (Target on PU) or

whether they should be stored only when a tripping command is gi ven (Target on

TRIP).

For devices with graphical display, use address 202 Spont. FltDisp. to specify

whether or not a spontaneous annunciation will appear automatically on the display

(YES) or not (NO). For devices with text display such indications will appear after a

system fault by any means.

In devices with text display, the st art page of the basic di splay can be se lected und er

address 204 Start image DD.

2.1.1.2 Settings

2.1.1.3 Information List

Addr. Parameter Setting Options Default Setting Comments

201 FltDisp.LED/LCD Target on PU

Target on TRIP Target on PU Fault Display on LED / LCD

202 Spont. FltDisp. NO

YES NO Spontaneous display of flt.annun-

ciations

204 Start image DD image 1

image 2

image 3

image 4

image 5

image 6

image 7

image 1 Start image Default Display

No. Information Type of In-

formation Comments

- Reset LED IntSP Reset LED

- Te st mode IntSP Test mode

- DataStop IntSP Stop data transmission

- UnlockDT IntSP Unlock data transmission via BI

- >Light on SP >Back Light on

- SynchClock IntSP_Ev Clock Synchronization

- HWTestMod IntSP Hardware Test Mode

1 Not configured SP No Function configured

2 Non Existent SP Function Not A vailable

3 >Time Synch SP_Ev >Synchronize Internal Real Time Clock

2.1 General

7UT613/63x Manual

C53000-G1176-C160-2

2.1.2 EN100-Modul 1

2.1.2.1 Function Description

An EN100-Modul 1 allows to integrate the 7UT613/63x into 100 Mbit Ethernet co m-

munication networks used by process control and automation systems and runn ing

IEC 61850 protocols. Thi s standard provides consistent inter-relay communication

without gateways or protocol converters. This allows open and interoperable use of

SIPROTEC 4 devices even in heteroge neous environments. In parallel to the process

control integration of the device, this interface can also be used for communication

with DIGSI and for inter-relay communication via GOOSE.

2.1.2.2 Setting Notes

Interface Selection No settings are req uired for ope ra tion of the Ethernet syste m int er fa ce m od ule

(IEC 61850, EN100-Modul 1). If the device is equipped with such a module (see

MLFB), the module is a utomatically configured to the interface available for it, na mely

Port B.

5 >Reset LED SP >Reset LED

15 >Test mode SP >Test mode

16 >DataStop SP >Stop data transmission

51 Device OK OUT Device is Operational and Protecting

52 ProtActive IntSP At Least 1 Protection Funct. is Active

55 Reset Device OUT Reset Device

56 Initial Start OUT Initial Start of Device

67 Resume OUT Resume

69 DayLightSavTime OUT Daylight Saving Time

70 Settings Calc. OUT Setting calculation is running

71 Settings Check OUT Settings Check

72 Level-2 change OUT Level-2 chang e

73 Local change OUT Local setting change

109 Frequ. o.o.r. OUT Frequency out of range

125 Chatter ON OUT Chatter ON

320 Warn Mem. Data OUT Warn: Limit of Memory Data exceeded

321 Warn Mem. Para. OUT Warn: Limit of Memory Parameter exceeded

322 Warn Mem. Oper. OUT Warn: Limit of Memory Operation exceeded

323 Warn Mem. New OUT Warn: Limit of Memory New exceeded

No. Information Type of In-

formation Comments

2 Functions

36 7UT613/63x Manual

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2.1.2.3 Information List

2.1.3 Configuration of the Functional Scope

The devices 7UT613/63x contain a series of protective and additional functions. The

scope of hardware an d firmwa re is mat ch ed to these functions. Additionally, the

control functions can be in accordance with the system requirements. In addition, in-

dividual functions may be enabled or disabled during configuration, or interactio n

between functions may be adjusted. Functions not to be used in the actual

7UT613/63x device can thus be masked out.

Example for the configu ra tio n of the sco p e of fu nc tion s:

7UT613/63x device s are intended to be used for busbars and transformers. Ove rload

protection should only be applied on transformers. If the device is used for busbars

this function is set to Disabled, for the transformers this function is set to Enabled.

The available pr ot ection and add itio nal functions can be configured as Enabled or

Disabled. For various functions, a choice may be presented between several

options which are explained below. Functions configured as Disabled are not pro-

cessed by the 7UT613/63x. There are no indications, and associated settings

(functions, limit values) are not displayed during detailed settings.

2.1.3.1 Setting Notes

Determinati on of

the Functional

Scope

Configuration settings can be entered using a PC and the software program DIGSI

and transferred via the front se rial port or the rear service interface. The oper ation via

DIGSI is explained in the SIPROTEC System Description/1/.

In order to change configuration p arameter, entering of password no. 7 (for p aram-

eter set) is required. Without the password, the settings may be read, but may not be

modified and transmitted to the device.

Function scope and, if necessary , the available options are set in the Function Scope

dialogue box to match plant requirements.

Note

The available functions and default setting s depend on the order variant of the device.

S pecial characteristics are set out in detail below . The annex includes a list of the func-

tions with the suitable protective objects.

No. Information Type of In-

formation Comments

009.0100 Failure Modul IntSP F ailure EN100 Modul

009.0101 Fail Ch1 IntSP Failure EN100 Link Channel 1 (Ch1)

009.0102 Fail Ch2 IntSP Failure EN100 Link Channel 2 (Ch2)

2.1 General

7UT613/63x Manual

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Parameter Group

Changeover Func-

tion

If the parameter group changeover function is desired, address 103 Grp Chge

OPTION should be set to Enabled. In this case, it is possible to apply up to four dif-

ferent group s of se ttings fo r the function parameters. During normal operation , a con-

venient and fast switch-over between these setting groups is possible. The setting

Disabled implies that only one function p arameter setting group can be applied and

used.

Protected Object The definition of the PROT. OBJECT (address 105) is important for the correct assign-

ment of the setting parameters and the possible inputs and outputs and functions of

the device. This object is defined as the main protected object which is i ntended to be

protected by the dif feren tial pr otection. It sho uld be me ntione d he re th at fu rthe r parts

of the power plant can be pr otected by other p art functions if not all measured cu rrent

inputs of the de vice are necessary for th e dif ferential protection of the main protected

object. The settings for the protected object a nd the following protection functions are

irrespective of how the protection functions act on the protected object and which

measuring loca tio ns (c ur re nt tran sf or me r s ) ar e av aila ble .

• Normal Power transformers with separate windings are set as PROT. OBJECT = 3

phase transf. regardless of the number of windings, vector grou ps and the

earthing conditions of the starpoints. This is also valid if a neutral earthing reactor

is situated within the protected zon e. If the differential protection shall cover a gen-

erator or motor an d a unit-connected power transformer (also with more than 2

windings), the protected object is also declared as transformer protection.

•For PROT. OBJECT = 1 phase transf. phase input L2 is not connected. This

option is suited especially to single-phase power transformers with 16.7 Hz (traction

transformers). Single-phase transformers are g enerally treated as three-phase

protected objects.

• g60For auto-transformers select PROT. OBJECT = Autotransf., rega rd le ss

whether the auto-transformer has one or more further separate windings. This

option is also applicable for shunt reactors if current transformers are installed at

both sides of the connection points.

• If three single-phase auto-transformers a re arranged as a power tra nsformer bank

(see figure 2-1), the con nections o f the st a rpoint leads o f the wind ings are accessi-

ble and often provided with current transformers. Here, it is possible, instead of a

normal transformer dif ferential pr otection via an entire po wer tr ansfo rmer ban k, to

realise three single-phase current comparison circuits via each auto transformer

winding. In fig ur e 2- 1 th e pr ot ected zone of eac h ph ase is shaded.

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38 7UT613/63x Manual

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Figure 2-1 Transformer bank, consisting of 3 single-phase auto-transformers with current

comparison via each single phase

• Such current comparison is more sensitive to 1-phase earth faults in one of the

transformers than the normal differential protection. This has a certain import ance

considering that 1-phase earth faults are the most probable faults in such banks.

• On the other hand, the compensation winding cannot and must not be included in to

this protection even if it is accessible and equipped with curren t transformers. This

application variant is based on the current law in that all currents flowing into a

winding must total to zero.

• If this protection variant is desired, set address 105 to PROT. OBJECT = Autotr.

node.

• Equal setting is valid for generators and motors. The setting PROT. OBJECT =

Generator/Motor also applies to series reactors and shunt reactors, if a com-

plete 3-phase set of current transformers is connected to both sides.

• For the operation of mini-busbars set PROT. OBJECT = 3ph Busbar. The

maximum number of feeders is determined by the number of three-phase measure-

ment inputs of the device. 7UT613 and 7UT633 allow a maximum number of 3,

7UT635 a maxim u m of 5 meas urin g locations. This settin g ap p lies als o to shor t

lines which are terminated b y two sets of cu rrent transforme rs. „Short “ means that

the current tra nsformer connections from the CTs to the device cause no impermis-

sible burden for the current transformers.

• If the device is used as busbar as 1-phase device or via su mmation transformer as

3-phase device, the setting PROT. OBJECT = 1ph Busbar applies. The maximum

number of feeders is deter mined by the number of single-phase me asurement

inputs of the device (7UT613 and 7UT633 provide up to 9, 7UT635 up to 12 mea-

surement inputs).

Differential Protec-

tion The differential protection is the main protective function of the device. Address 112

DIFF. PROT. is thus set to Enabled.

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Restricted Earth

Fault Protection The Restricted earth fault protection (address 113 REF PROT.) com-

pares the sum of the phas e curren ts flowing into the three-phase protected object

together with the current flowing into the earthed starpoint. Further information is given

in section 2.3.

Note that this is not applicable to the protected object busbar (address 105 PROT.

OBJECT= 1ph Busbar and address 105 PROT. OBJECT= 3ph Busbar).

Restricted Earth

Fault Protection 2 Likewise, address 114 REF PROT. 2 is valid for the second possible restricted earth

fault protection

Dynamic Pickup

Switching for Over-

current Protection

The dynamic param eter switching (address 117 COLDLOAD PICKUP) permits tempo-

rary switching to alternative pickup values in case of overcurrent protection function

for phase cur rent s, ze ro sequence current s an d earth cur rent s. Fur ther informa tion is

given in section 2. 6.

Overcurrent Pro-

tection for Phase

Currents

To select the characteristic group according to which the phase overcurrent time pro-

tection is to operate use address 120 DMT/IDMT Phase. This protection is not

applicable for single-p hase busbar protection (addr ess105 PROT. OBJECT = 1ph

Busbar). If it is only used as definite time overcurrent protection (O/C), set Definite

Time. In addition to the definite time overcurr ent protection an inverse time overcur-

rent protection may be configured, if required. The latter operates according to an IEC-

characteristic (TOC IEC), to an ANSI-characteristic (TOC ANSI) or to a user-define d

characteristic. In the latter case, the trip time characteristic (User Defined PU) or

both the trip time characteristic and the reset time characteristic (User def. Reset)

are configured. For the characteri stics please refer to Technical Data.

Overcurrent Pro-

tection for Phase

Currents 2 and 3

In the case of 7UT613/63x it is possible to use two additional phase overcurrent pro-

tection functions. One over current protection can thus be impleme nted independently

on various sides of the main protectio n object or three-ph ase measuring loca tions. In

the case of DMT/IDMT Phase2 a selection can be made under the address 130 from

the same options as for the first overcurrent protection. The same applies under

address 132 for DMT/IDMT Phase3. The selected options can be equal to or different

for all of the three overcurrent protection functions.

Overcurrent Pro-

tection for Zero Se-

quence Currents

The type of characteristics used for the zero sequence (residual) overcurrent time pro-

tection can be set in address 122 DMT/IDMT 3I0. The same options are available as

for the phase overcurrent protection. However, for zero sequence current time over-

current protecti on the settings may be dif ferent to the settings selected for phase time

overcurrent protection. This protection function always acquires the residual current

3I0 of the supervised side. This current is calculated from the sum of the correspond-

ing phase currents. This measuring location may be different from that of the phase

overcurrent protectio n. Note that the zero sequence overcurren t protection is not pos-

sible on single-phase protected objects (address 105 PROT. OBJECT = 1 phase

transf. or 1ph Busbar).

Overcurrent Pro-

tection for Zero Se-

quence Currents 2

and 3

At 7UT613/63x it is possible to use two additional zero sequence ove rcurrent protec-

tion functions. Zero se quence current can thus be detected independently on variou s

three-phase measuring locations. For DMT/IDMT 3I0 2 under address 134 the

same options can b e selected again in dependently. The same applie s under address

136 for DMT/IDMT 3I0 3. The selected options can be equa l to or different from the

three overcurrent protection functions.

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40 7UT613/63x Manual

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Time Overcurrent

Protection for Earth

Current

There is another earth curr ent time overcu rrent protectio n which is indepe ndent from

the before-described zero sequence time overcurrent protection. This protection, to be

configured in address 124 DMT/IDMT Earth, acquires the current connected to a

single-phase current measuring input. In most cases, it is the starpoint current of an

earthed starpoint (for transformers, generators, motors or shunt reactors). For this pro-

tection you may select one of the characteri stic types, the same way as for the phase

time overcurrent protection, no matter which characteristic has been selected for the

latter.

Overcurrent Pro-

tection for Earth

Current 2 (Starpoint

Current)

For earth current detection in 7UT613/6 3x a second earth current over curren t protec-

tion is available with which a further single-phase overcurrent protection can be rea-

lised. If, for example, a transformer YNyn0 is earthe d at both starpoint s, the in-flowing

earth current can be monitored in each starpoint. Naturally, both earth current over-

current protection functions ca n b e used completely indepe nde ntly at d ifferent points

of your system for the detection of single-phase currents. For DMT/IDMT Earth2

under address 138 a sele ction can be made from the same options indepe ndently for

the other overcurrent protection functions.

Single-phase Over-

current Protection A single-phase definite-time overcurrent protection DMT 1PHASE for different user re-

quirements is available in address 127. This protection function is very well suited e.g.

for highly sensitive tank lea kage protection or high-imped ance un it protectio n. A high-

sensitivity current input can be used for this purpose.

Asymmetrical Load

Protection The asymmetrical load protection monitors the asymmetr ical current (negative se-

quence system) in three-p hase protected objects. In a ddress 140 UNBALANCE LOAD

the trip time characteristics can be set to definite time (Definite Time), additionally

operate according to an IEC–characteristic (TOC IEC) or to an ANSI–characteristic

(TOC ANSI). It can also be supplemented by a thermal stage (DT/thermal). The

asymmetrical load protection is normally not possible in single-phase applications

(address 105 PROT. OBJECT = 1 phase transf. or 1ph Busbar).

Thermal Overload

Protection In address 142 THERM. OVERLOAD the user can additionally choose one of the two

methods of overload detection. Note that the overload protection for single-phase

busbar protection (address 105 PROT. OBJECT = 1ph Busbar) is not possible. If

the overload pr o tec tio n is not requir ed , se t to Disabled. Furthermore, the following

is available:

• Overload protection with a thermal replica according to IEC 60255-8,

• Overload protection with calculation of hot-spot temperature and the aging rate ac-

cording to IEC 60354

• Overload protection using a thermal replica with ambient temperature influence

In the first case it can still be selected whether only the overtemperature in the thermal

replica, resulting from the ohmic losses in the windings of the protected object must

be detected, or whether the total temperature under consideration of the coolant or en-

vironmental temperature must be calculated.

If the coolant or environmental temperature must be taken into con sider ation , a RTD-

box must be connected to the device (see below), via which the coolant or environ-

mental temperatur e is enter ed into the device . In this case set a ddress 142 THERM.

OVERLOAD = th repl w. sens (thermal replica with temperature measurement).

If there is no possibility to measure the coolant or environmental temperature and to

pass to the device, address 142 THERM. OVERLOAD = th rep w.o. sen (thermal

replica without temperature measurement) can be set. In this case the device calcu-

2.1 General

7UT613/63x Manual

C53000-G1176-C160-2

lates the overtemperature in the protected object from the flowing current, with refer-

ence to the permissible temperature. This method is characterised by its easy han-

dling and a low number of setting values.

Detailed knowledge about the protected object, the environment and cooling is re-

quired for overcurrent protection with hot-spot calculation in accordance with IEC

60354; it is advisable in case of transformers with integrated temperature detectors.

For this method, set address to 142 THERM. OVERLOAD = IEC354. For further details

see section 2.9

Overload

Protection 2 In case of 7UT613/63x it is possible to use an additional overload protection. In case

of a transformer, for example, the overtemperature of two windings can thus be de-

tected by means of current measurement or , apart from a transformer , the windings of

a shunt reactor can be monitored. For THERM.OVERLOAD2 under address 144 select

from the same options as for the first overload protection.

RTD-boxes for

Overload If, in case of an over load with thermal replica, the coolan t temperatur e must be t aken

into consideration, or if an overlo ad protection with hot-spot calculation in accorda nce

with IEC 60354 is used (address 142 THERM. OVERLOAD = th repl w. sens or

IEC354), at least one RTD-box 7XV5662–xAD must be connected at the service in-

terface or an additional interface of the device, which informs the device with regard

to the coolant temperature. The additional interface is set in address 190 RTD-BOX

INPUT. The possible interfaces are dependent on the version of 7UT613/63x (cf. Or-

dering Information and Accessories in the Appendix). Port C (service interface) is

available in all versions. Depending on the device version, Port D is also possible.

RTD-box Type If RTD-boxes with 7UT613/63x are oper ated, set the number and type of transfer of

measuring locations (RTD = Resistance Temperature Detector) under address 191

RTD CONNECTION: 6 RTD simplex or 6 RTD HDX (with one RTD- box) or 12 RTD

HDX (with two RTD-boxes). The settings have to comply with those of the RTD-box.

Note

The assignment with regard to which temperature measuring point shall be used for

which overload protection will be effected later during setting of the protection func-

tions.

Overexcitation

Protection The overexcitation protection is used to detect increased overflux or overinduction

conditions in generators and transformers, especially in power station unit transform-

ers, which cause impermissible temperatur e rise in the iron. Note that the overexcit a -

tion protection (address 143 OVEREXC. PROT.) can only be used if the device is

equipped with voltage measurement inputs and voltages are connected. This protec-

tion is not applicable for single-phase busbar protection (address105 PROT. OBJECT

= 1ph Busbar). For further details see section 2.11

Reverse Power

Protection The reverse power protection (address 150 REVERSE POWER) protects mainly a

turbine-generator unit during failure of ene rgy to the prime mover. It can be applied,

for example, as disconnection criterion in the syst em. It can only be used in three-

phase protected objects, thus not at address 105 PROT. OBJECT = 1 phase

transf. or 1ph Busbar. The reverse current protec tion r equires that th e device is

connected to a voltage transformer set and, together with a connected current trans-

2 Functions

42 7UT613/63x Manual

C53000-G1176-C160-2

former, allows for a reasonable calculation of the active power. The definition of the

reverse direction is explained in detail elsewhere.

Forward Power

Monitoring The forward po wer monitoring (address 151 FORWARD POWER) can monitor a pro tect-

ed object with regard to undershooting as well as exceed ing of a preset active power.

It can only be used in three-ph ase protected object s, thus not at address 105 PROT.

OBJECT = 1 phase transf. or 1ph Busbar. The forward power monitoring re-

quires that the device is connected to a voltage transformer set and, together with a

connected current transformer , allows for a reasonable calculation of the active power .

The definition of the forward direction is explained in detail elsewhere.

Undervoltage

Protection Undervoltage protection (address 152 UNDERVOLTAGE) detects voltage dips in elec-

trical machines and avoids inadmissible operating states and possible loss of stability

in electrical devi ces. It can onl y be used in three -phase pr otected objects, thus not at

address 105 PROT. OBJECT = 1 phase transf. or 1ph Busbar. It is normally

only possible in device variant that have a voltage measuring input.

Overvoltage

Protection The overvoltage protection (address 153 OVERVOLTAGE) protects the system from

impermissible voltage increases, thus avoiding damage to it s insulation. It can only be

used in three-phase protected object s, thus not a t add ress 105 PROT. OBJECT = 1

phase transf. or 1ph Busbar. It is normally only possible in device variant that

have a voltage measuring input.

Frequency

Protection The frequency protection (address 156 FREQUENCY Prot.) has the task to detect

increased or de crease d frequencie s in the power st at ion sector. It can be applied, for

example, as load shedding in the system. It can only be used in three-phase protected

objects, thus not at address 105 PROT. OBJECT = 1 phase transf. or 1ph

Busbar. As the frequency is derived from the measuring volt age, this is only possible

in device versions with voltage measuring inputs.

Circuit-breaker

Failure Protection The circuit-bre aker protection (address 170 BREAKER FAILURE) is applicable to any

circuit breaker. The assignmen t is carrie d ou t at a late r stage. Note that in a single-

phase busbar protection (address 105 PROT. OBJECT = 1ph Busbar) it is not pos-

sible.

Circuit-breaker

Failure Protection 2 7UT613/63x provides a second circuit-breaker failure protection (address 171

BREAKER FAIL. 2) for an additional circuit breaker in the system. The information

applicable to the first applies here.

Measuring

Location Discon-

nection

The disconnection of the measuring loca tion (addr ess 180 DISCON.MEAS.LOC) is a

help function for commissioning and revision works in the system.

Measured Value

Monitoring The different methods of measured value monitoring (address 181 M.V. SUPERV)

are set out in detail in section 2.19.1. Voltages ca n of cour se al so b e mo nitored if the

device provides voltage inputs.

Trip Circuit Super-

vision For trip circuit monitori ng, under add ress 182 Trip Cir. Sup., a selection can be

made with regard to operation with two binary inputs (2 Binary Inputs) or only one

binary input (1 Binary Input). The inputs must be potential-free.

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C53000-G1176-C160-2

External Trip

Command The possibilities of two trip commands from external sources can be configured in ad-

dresses 186 EXT. TRIP 1 and 187 EXT. TRIP 2.

Flexible Functions 7UT613/63x provides flexible functions that can be used for protection, monitoring or

measuring tasks. Should you wish to apply these functions, this must be determined

here.

up to 20 flexible protection and monito ring functions are possible,

up to 20 average values from measur ed values or calculated values and

up to 20 minimum or maximum values for measured values or calculated values.

At this point, only select the respective required number. The configuration of this

function, i.e. which input variables are most relevant, and the setting of function pa-

rameters is carrie d ou t at a lat er stage, see sectio n 2. 22 .7 .

2.1.3.2 Settings

Addr. Parameter Setting Options Default Setting Comments

103 Grp Chge OPTION Disabled

Enabled Disabled Setting Group Change Option

105 PROT. OBJECT 3 phase transf.

1 phase transf.

Autotransf.

Autotr. node

Generator/Motor

3ph Busbar

1ph Busbar

3 phase transf. Protection Object

112 DIFF. PROT. Disabled

Enabled Enabled Dif ferential Protection

113 REF PROT. Disabled

Enabled Disable d Restric te d ea rth fault prot e c ti on

114 REF PROT. 2 Disabled

Enabled Disable d Restric te d ea rth fault prot e c ti on 2

117 COLDLOAD PICKUP Disabled

Enabled Disabled Cold Load Pickup

120 DMT/IDMT Phase Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT Phase

122 DMT/IDMT 3I0 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT 3I0

124 DMT/IDMT Earth Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT Earth

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127 DMT 1PHASE Disabled

Enabled Disabled DMT 1Phase

130 DMT/IDMT Phase 2 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT Phase 2

132 DMT/IDMT Phase 3 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT Phase 3

134 DMT/IDMT 3I0 2 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT 3I0 2

136 DMT/IDMT 3I0 3 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT 3I0 3

138 DMT/IDMT Earth2 Disabled

Definite Time

TOC IEC

TOC ANSI

User Defined PU

User def. Reset

Disabled DMT / IDMT Earth 2

140 UNBALANCE LOAD Disabled

Definite Time

TOC IEC

TOC ANSI

DT/thermal

Disabled Unbalance Load (Negative Se-

quence)

142 T HERM. OVERLOAD Disabled

th rep w.o. sen

th repl w. sens

IEC354

Disabled Thermal Overload Protection

143 OVEREXC. PROT. Disabled

Enabled Disabled Overexcitation Protection (U/f)

144 THERM.OVERLOAD2 Disabled

th rep w.o. sen

th repl w. sens

IEC354

Disabled Thermal Overload Protection 2

150 REVERSE POWER Disabled

Enabled Disabled Reverse Power Protection

151 FORWARD POWER Disabled

Enabled Disabled Forward Power Supervision

152 UNDERVOLTAGE Disabled

Enabled Disabled Undervoltage Protection

153 OVERVOLTAGE Disabled

Enabled Disabled Overvoltage Protection

Addr. Parameter Setting Options Default Setting Comments

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2.1.4 Power System Data 1

2.1.4.1 Topology of the Protected Object

Measured Value

Inputs The devices of the 7UT613/63x family comprise various types with different function

facilities and different hardware scope which latter determines the number of available

analog input s. Dependent on the ordering type, the fo llowing analog input s are provid-

ed:

Table 2-1 Analog measuring inputs

1) also applicable for single-phase power transformers

2) selectable, contained in the number of 1-phase inputs

156 FREQUENCY Prot. Dis abled

Enabled Disabled Over / Underfrequency Protection

170 BREAKER FAILURE Disabled

Enabled Disabled Breaker Failure Protection

171 BREAKER FAIL. 2 Disabled

Enabled Disabled Breaker Failure Protection 2

180 DISCON.MEAS.LOC Disabled

Enabled Disabled Disconnect measurment location

181 M.V. SUPERV Disabled

Enabled Enabled Measured Values Supervisi on

182 Trip Cir. Sup. Disabled

2 Binary Inputs

1 Binary Input

Disabled Trip Circuit Supervision

186 EXT. TRIP 1 Disabled

Enabled Disabled External Trip Function 1

187 EXT. TRIP 2 Disabled

Enabled Disabled External Trip Function 2

190 RTD-BOX INPUT Disabled

Port C

Port D

Disabled External Temperature Input

191 RTD CONNECTION 6 RTD simplex

6 RTD HDX

12 RTD HDX

6 RTD simplex Ext. Temperature Input Connec-

tion Type

Addr. Parameter Setting Options Default Setting Comments

Type For 3-phase protected objects1) For busbar 1-phase Voltage

3-phase Voltage

1-phase

Current

3-phase1) Current (auxiliary) Current

1-phase Current (auxiliary)

1-phase sensitive2) 1-phase sensitive2)

7UT613 3 3 1 9 3 1 1 1

7UT633 3 3 1 9 3 1 1 1

7UT635 51 1 —— — ——

44 2 124 2 ——

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46 7UT613/63x Manual

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Terminology The large variety of connection facilities of the device requires to create an exact

image of the topology of the protected object. The device must be informed in which

way the measured quantities derived from the measured value inputs of the device

have to be processed by the different protection functions.

The topology of the protecte d o bject comprises the totality of all information: how the

protected object (or several objects) is arranged, which current transformer sets

supply the currents flowing into the protected object(s), and which voltages (if avail-

able) are measured at which location of the protected object. Thus, the result of the

topological consideration is a complete replica of the protected obje ct(s) with all avail-

able measuring locations. It will be decided at a later stage which measured quantities

should be used by which protection functions (section 2.1.6).

Distinction must be made between the Main Pr otected Object and other protected ob-

jects. The main protected object is that to which the main protection function, i.e. the

diff erential prote ction, is applied. Th is is the powe r transformer, generator, motor, etc.

as stated under address 105 PROT. OBJECT.

The main protected obje ct has 2 or more sides . The sides of a power transformer are

the winding terminals, a ge nerator or motor is terminated by the terminal side and the

starpoint side. In case of combined objects like generators and transformers in unit

connection the sides are the exterior terminals. The expression „side“ is applied exclu-

sively to the main protected object.

The current s flowing into the protected objec t are taken from the measuring locations.

These are represented by the current transformers which limit the protecte d zone.

They may be or may not be identical with the sides. Differences between measure-

ment locations and sides arise, for example, if a power tran sformer winding (= 1 side)

is fed from 2 galvanically connected lead wires via 2 sets of current transformers (mea-

suring locations).

The measuring locations which feed a side of the main protected object are the as-

signed measuring locations. If the device provides more 3-phase current measuring

inputs than a re needed for the allocation to th e sides of the main protected obje ct, the

remaining measuring points are called non-assign ed measuring points. These can be

used for other protection, supervision, and measuring purposes which process

3-phase current s, e.g. restricted earth fault protection, time overcurrent protection, un-

balanced load protection, overload protection, or simply for display of measured

values. The non-assigned measuring points thus detect currents of a further protected

object.

Depending on the device version, one to four single-phase auxiliary current inputs for

auxiliary transformers. These can be used for processing of 1-phase currents, e.g. the

earth current between a wind ing starpoint and earth, or the leakage current between

a transformer tank and earth. They can also be assigned to the main protected object

or can be non-assigned. If they are assigned to a side of the main protected object,

they can be processed by the differential protection (example: inclusion of the star-

point current in the differential current). The currents of the non-assigned auxiliary

inputs can be processed by other protection functions (example: detection of a tank

leakage current by the single-phase overcurrent protection, or they can also be com-

bined with other non-assigned 3-phase measuring points (example: restricted earth

fault protection on a protected object other than the main protected object).

Figure 2-2 illustrates the terminology by an example. Note that the example is not

practicable in this arrangement as it contains more connections than possible; it

serves only for clarification of the terminology.

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The main protected object is a two-wind ing transformer YNd with an earthed starpo int

at the Y-side. Side S1 is the upper voltage side (Y), side S2 is the lower voltage side

(d). This definition of the sides for the main protected object (and only for it) is the basis

for the formation of the differential and restraint currents used in the differential pro-

tection.

For the side S1 2 measuring locations M1 and M2 exist. The currents that are mea-

sured there belong to the side S1, their sum flowing on side 1 in the protected zone of

the main protected object. The position of the busbar isolator is not important here.

Likewise, the polarity of the currents is not yet conside red under topology aspects.

At the lower voltage side, side S2 also has two measuring locations because of its

branch point to the auxiliaries system circuit: M3 and M4. The sum of these currents

flows into the low voltage side (S2) of the main protec te d ob je ct.

The 4 measuring locationsM1 to M4 are assigned to the sides of the main protected

object, thus assigned measuring locations. They are the basis for the measured value

processing of three- phase currents for the differential protection. Basically, the same

applies to a single-phase tran sformer; Here, only the measured currents of the mea-

suring locations are connected in two-phase.

Measuring location M5 is not assigned to the main protected object, but to the cable

feeder, which is not related in any way to the transformer. M5 is thus a non-assigned

measuring location. The cu rrents of th is measuring location can be used for other pro-

tection functions, e.g. for 3-phase overcurrent protection for protection of the cable

feeder.

In 3-phase bu sbar protection ther e is no dif ference between mea suring locations and

sides; both correspond with the feeders of the busbar.

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Figure 2-2 Example for the terminology of a topology

Sides:

S1 High voltage side of the main protected object (power transformer)

S2 Low voltage side of the main protected object (power transformer)

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 1

M3 Measuring location, assigned to the main protected object, side 2

M4 Measuring location, assigned to the main protected object, side 2

Measuring locations 3-phase, non-assigned:

M5 Measuring location, not assigned to the main protected obje ct

Auxiliary measuring locations, 1-phase:

X3 Measuring location, assigned to the main protected object, side 1

X4 Measuring location, not assigned to the main protected object

The auxiliary measuring location X3 provid es the st arpoint cu rrent of the transformer.

It is assigned to side 1 of the main protected object as an assigned measuring location.

This measuring location can be used by the dif ferential protection function for the for-

mation of the differential current. For the restricted earth fault protection operating at

the higher voltage winding, it can supply the starpoint current of side 1.

The auxiliary measuring location X4 is not assigned to the main protected object,

because it is not required by the differ ential protection. It is a non-assigned measuring

location which is used to dete ct the tank earth fault curr ent and to feed it via the single-

phase measuring input IX4 to the single- phase overcurrent protection used for tank

leakage protection. Although t ank leakage protection is in a broader sense part of the

transforme r pr ot ection, X4 is not assigned to the main protection function because

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single-phase overcurrent pr otection is an autonomous protection function without any

relation to a specific side.

Figure 2-3 sh ows an example of a topo log y whic h in ad dition to the main pr ot ected

object (the three-windi ng transfor mer) h as an other pr otected obje ct ( the neutra l re ac-

tor) with a three-phase me asuring location and an additional 1-phase measuring lo-

cation assigned to it. While in the main protected object one side can be fed from

various measuring location s (this is the case for the high-volt age side S1 of the trans-

former, which is fed by M1 and M2), no sides are defined for the additiona l protected

object. Nevertheless, other protection functions (not the differential protection) can act

on it, such as the overcurrent protection (3-phase on M5), the earth overcurrent pro-

tection (1-phase on X4), or the restricted earth fault protection, which compares the

triple zero sequence current from M5 with the earth fault current of X4.

Figure 2-3 Topology of a three-winding transformer as main protected object and a neutral

reactor arranged outside of the protected zone as a further protected object;

right hand three-phase illustration of the neutral reactor

Sides:

S1 High voltage side of the main protected object (power transformer)

S2 Low voltage side of the main protected object (power transformer)

S3 Tertiary winding side of the main protected object (power transformer)

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 1

M3 Measuring location, assigned to the main protected object, side 2

M4 Measuring location, assigned to the main protected object, side 3

Measuring locations 3-phase, non-assigned:

M5 Measuring location, not assigned to the main protected object, associa te d with the

neutral reactor

Auxiliary measuring locations, 1-phase:

X4 Measuring location, not assigned to the main protected object, associated with the

neutral reactor

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Determining th e

Topology You have to dete rm in e th e to polog y of the ma in prote c te d ob je ct an d fu rth e r obj ec ts

(if applicable). The following clarifications are based on the examples given above and

the terminology defined above . Further examples will be given where needed. The

necessary and possible settings depend on the type of main protected object as

defined during configuration of the scope of functions (section 2.1.3).

The measuring locations for a single-phase power transformer are treated like

3-phase measuring locations: From the point of view of measured value conditioning,

the single-phase transfor mer is handled as a three-phase transformer with missing

phase (L2).

Note

If you have changed the protected object, you will have to check and re-adjust all to-

pological data.

Note

When configuring th e topology proceed exactl y in the order given below. Some of the

following settings and setting possibilities depend on settings performed before. In

DIGSI the tabs (setting sheet s) under Power System Data 1 should be edited from the

left tab to the right.

First of all, number the sides of th e main protec ted object consecutively, next number

the measuring loca tions, beginning with those for the main object, then for the remain-

ing. In the example (Figure 2-2) there are 2 sides S1 and S2, the 5 measuring locations

are M1 to M5.

The following sequence of sides is advised:

• For power transformers, start with the higher voltage side, as well for genera-

tor/transformer units or motor/transformer units.

• For auto-transformers, the common winding must be declared as side 1 and side 2,

further ta ps shall follow (if applicab le), then a delta winding (i f applicable). Side 5 is

not permitted her e .

• For generators, start with the terminal side.

• For motors and shunt reactors, start with the current supply side.

• For series reactors, lines, and busbars, there is no preferred side.

Side determination plays an important role for all of the following settings.

Proceed to number the measuring locations, beginning with those which are assigned

to the main protected object. Take the order of side numbering, next the non-assigned

measuring locations (if used). Refer also to Figure 2-2.

Proceed numbering the auxiliary measuring locations (1-phase), again in the order:

assigned locations and then further (if used).

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Note

The determination of the sides and measuring locations is imperative for all further

setting step s. It is also important that the currents from the measuring locations (cu r-

rent transformers) are connected to the associated analogue current inputs of the

device: The currents of measuring location M1 must be connected to the device at

measuring locations IL1M1, IL2M1, IL3M1 (in single-phase transformers IL2M1), is omit-

ted!

The topological data can be altered only with a PC using DIGSI.

Global Data for 3-

Phase Measuring

Locations

Determine the total number of 3-phase current measuring locations (= connected

current transformer sets) which are connected to the device. Enter this number in

address 211 No Conn.MeasLoc (number of connected measuring locations).

7UT613 and 7UT633 allow a maximum number of 3, 7UT635 a maximum of 5 mea-

suring locations. The e xamples in Figures 2 -2 and 2-3 cont a in 5 measur ing locations

each.

The number of 3-phase measuring locations assigned to the main protected object are

set in address 212 No AssigMeasLoc (number of assigned measuring locations).

Of course, this number cannot be higher than that of address 211. The difference No

Conn.MeasLoc – No AssigMeasLoc is the number of non-assigned three-phase

measuring locations. Both examples in the Figures 2-2 and 2-3 show five of the four

assigned 3-phase measurin g location s: M1 to M4. M5 is a non-assigned measuring lo-

cation.

The number of sides associated with the main protected object is set in address 213

NUMBER OF SIDES. In the example of figure 2-2, the protected object is a power

transformer with 2 windings; the number of sides is 2: S1 and S2. In the example of

Figure 2-3, the main protected object is a power transformer with 3 windings; the

number of sides is 3. In case of an auto-transformer, a maximum of 4 sides is per mis-

sible (see below).

Of course, the number of sides can be equal to the number of measuring locations (but

never greater). The example in Figure 2-4 shows a three-winding power transformer

with one set of current transformers at each side. In this example: No AssigMeasLoc

= 3 and NUMBER OF SIDES = 3.

No distinction between sides and measuring locations is made in case of a busbar.

Both correspond to the feeders. Therefore, address 213 is missing if address 105

PROT. OBJECT = 3ph Busbar has been s et .

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Figure 2-4 Example of a topology on a three-winding transformer

Sides:

S1 High voltage side of the main protected object (power transformer)

S2 Low voltage side of the main protected object (power transformer)

S3 Tertiary winding side of the main protected object (powe r transformer)

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 2

M3 Measuring location, assigned to the main protected object, side 3

Special Consider-

ations on Auto-

Transformers

As mentioned above, the common windings on auto-tr ansformers must always be

defined as S1 and S2. A third side may be present if the compensation winding is di-

mensioned as power wind ing (tertiary winding) and accessible (figure 2-5). In this

example we have 3 sides and 4 assigned measuring locations. During parametrization

of the auto-transformer, one must always start with the auto-wind ing .

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Figure 2-5 Topology of an auto-transformer with a compensation winding which is used as

tertiary winding

Sides:

S1 High voltage side of the main protected object (auto-transformer)

S2 Low voltage side of the main protected object (auto-transformer)

S3 Tertiary winding side (accessible compensation winding) of the main prote cted object

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 1

M3 Measuring location, assigned to the main protected object, side 2

M4 Measuring location, assigned to the main protected object, side 3

A further tap of the winding can also be used as the third side. Be aware that the num-

bering sequence always starts with the auto-connected winding: full winding, taps, and

then accessibl e de lta winding if requi red.

Auto-Transformer

Banks If three single-phase auto-transformers are arranged as a power transformer bank, the

connections of the starpoint leads of the auto-windings are accessible and often pro-

vided with current transformers. During configuration of the functional scope in section

2.1.3 you have decided whether a differential protection must be realised via the entire

transformer ban k, or whether you prefer a curren t comparison via the winding of each

phase by means of current law.

Differentia l pro tec tio n over th e en t ire pow er tr ans fo rme r ba n k:

Regarding the first case, figure 2-6 gives an example of a 3-phase presentation. In this

example we have 3 side s and 3 assigned three-phase mea suring locations. The auto-

connected winding terminals form the sides S1 (full winding) and S2 (t ap ) with the as-

signed 3-phase measuring locations M1 and M2. As the delta winding functio ns both

as the tertiary winding a nd the compe nsation winding, it is th e th ird side S3 wi th mea-

suring location M3.

The currents measured in the starpoint connections are not immediately required.

However, you can assign it to a further three-ph ase measuring location. The device

then calculates the current sum as earth current, if this had been set accordingly in the

differential protection (see section 2.2.7).

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The sum of the three currents measur ed in the starpoint le ads can be connected to an

auxiliary 1-phase current input of the device (illustrated dotted) in order to use it for

restricted earth fault protection and/or time overcurrent protection. This auxiliary mea-

suring location X3 is then assigned to both sides S1 and S2, since the current entering

the protected object at X3 must be compared with the sum of the currents at both

sides. More details with regard to the assignment are discussed later.

Figure 2-6 Topology of a transformer bank consisting of 3 single-phase auto-transformers

with compensation winding dimensioned as accessible tertiary winding

Sides:

S1 High voltage side of the auto-connected winding of the main protected object

S2 Low voltage side (tap) of the auto-connected winding of the main protected object

S3 Tertiary winding side (accessible comp ensation winding) of the main protected object

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 2

M3 Measuring location, assigned to the main protected object, side 3

Auxiliary measuring locations, 1-phase, assigned to the main object (current sum of the

CT set):

X3 Measuring location, assigned to the main protected object, side 1 and 2

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Current comparison for common winding of an auto-transformer:

If during configuration of the functional scope in section 2.1.3 a pure current compar-

ison via each windin g has be en sele cte d , the n the ex am p le of fig ur e 2- 7 ap p lies.

Besides the common winding terminals of the sides S1 (full winding) and S2 (tap) with

the assigned 3-phase measuri ng locations M1 and M2, one more sid e S3 is defined at

the st arp oint termin als with the 3- phase m easu ring lo ca tion M3. In this way, a current

comparison can be realised over each of the three transformer windings, i.e. each

phase with its 3 measu ring locations.

Such current comparison is more sensitive to 1-phase earth fault s in one of the tra ns-

formers than the normal differential protection. This has a certain importance consid-

ering that 1-phase earth fault s are th e most probab le fault s in such banks. By means

of the par ameter setting at address 105 PROT. OBJECT = Autotransf.Autotr.

node, the current comparison protection of the auto-transf. node is supported.

On the other ha nd , th e com p ensa tio n windin g cann o t and mu st no t be inclu de d into

this protection even if it is accessible and equipped with curre nt transformers. This ap-

plication variant is based on the current law in that all currents flowing in to a wind ing

must total to zero. In auto-transformers with stabilising winding, the stabilising winding

should be protected sep ar ately (e .g. with time overcurrent protection). During setting

of address 105 PROT. OBJECT = Autotransf., a stabilising winding can be includ-

ed.

The current transformer X1 in figure 2-7 is not required. In order to realise an earth

overcurrent protection or a restricted earth fault protection in this arrangement, you

can feed the sum of the thre e currents measured at M3 to an auxiliary 1-phase current

input of the device. An example of a connection, where a measuring loca tion M3

serves as 3-phase measuring location for the curr en t co mparison and where simulta-

neously the total cur rent 3I0 of the transformer set is led to a 1-phase measuring loca-

tion IX1 of the device, is available in the annex.

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Figure 2-7 Topology of a transformer bank consisting of 3 single-phase auto-transformers,

topology definitions for a current comparison protection for each phase

Sides:

S1 High voltage side of the auto-connected winding of the main protected object

S2 Low voltage side (tap) of the auto-connected winding of the main protected object

S3 Starpoint side of the auto-connected winding of the main protected object

Measuring locations 3-phase, assigned:

M1 Measuring location, assigned to the main protected object, side 1

M2 Measuring location, assigned to the main protected object, side 2

M3 Measuring location, assigned to the main protected object, side 3

Auxiliary measuring locations, 1-phase, assigned to the main object:

X1 Measuring location, assigned to the main protected object, side 1 and 2

Global Data for 1-

Phase Busbar Pro-

tection

If the device is used as busbar protection, either as single-phase protection or as

three-phase protection via external summation transformers, set the number of

feeders of the busbar in address 216 NUMBER OF ENDS. The minimum number

amount s to 3 ends (with less than that the operation of a 7UT613/63x would not make

sense).

The maximum number of feeders amounts to 9ends in 7UT613 and 7UT633 and 12

in 7UT635.

Assignment of 3-

phase Measuring

Locations

After determina tion of the global data, the 3-phase measuring locations must be as-

signed to the sides of the main protected object. Only few meaningful combinat ions

are possible for this assignment because of the condition that always NUMBER OF

SIDES ≤ No AssigMeasLoc ≤ No Conn.MeasLoc and that a protected object pro-

vides at least 2 sides. In order to exclude impossible combinations at all, only those

addresses of the following list s are requested which cor respond to the global settings

of addresses 211, 212, and 213. Further more, only meaningful setting options

appear.

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If the global data are implausible, the device does not find any meaningful combination

of assignment possibilities. In this case you will find address 230 ASSIGNM. ERROR,

which shows one of the following options:

•No AssigMeasLoc the number of assigned measuring locations is implausible;

•No of sides the number of sides is implausible.

This parameter cannot be changed. It merely informs you about the implausibility of

the global settings. If it appears, you cannot ma ke any furthe r assignment s. Rech eck

in this case carefully the addresses 211, 212, and 213 and correct the settings.

Only one of the variety of the following listed assignment parameter is possible. But in

the actual case, only one address appears, namely the address which corresponds to

the above mentioned number of sides and assigned measuring locations. The mea-

suring locatio n an d sid e ar e separated by a com m a, e.g . 3M,2S means 3 assigned

measuring locations at 2 sides.

Only the combinations possible for the number of measuring locations and sides

appear as setting options. The measuring locations of the same side are connected

by a „+“ sign; the side sequence by a comma. In the following, all possibilities are ex-

plained.

Address 220 ASSIGNM. 2M,2S appears if 2 assigned measuring locations (address

212) have been selected for 2 sides (address 213). Only one option is possibl e:

•M1,M2, i.e. the 2 measuring lo ca tions a re assign ed: M1 to side S1, M 2 to side S2.

Since no other possibilities exist there are no further options.

Address 221 ASSIGNM. 3M,2S appears if 3 assigned measuring locations (address

212) have been selected for 2 sides (address 213). The following options are possi-

ble:

•M1+M2,M3, i.e. the 3 measuring locations are assigned : M1 and M2 to side S1, M 3

to side S2.

•M1,M2+M3, i.e. the 3 measuring locations are assigned : M1 to side S1, M2 and M3

to side S2.

Address 222 ASSIGNM. 3M,3S appears if 3 assigned measuring locations (address

212) have been selected for 3 sides (address 213). Only one option is possibl e:

•M1,M2,M3, i.e. the 3 measuring locations are assigned: M1 to side S1, M2 to side

S2, M3 to side S3. This corresponds to the examples in figures 2-4 and 2-6, 2-7.

The further assignment possibilities can only occur in 7UT635 since 7UT613 and

7UT633 provide a maximum of 3 three-phase current inputs (cf. table 2-1).

Address 223 ASSIGNM. 4M,2S appears if 4 assigned measuring locations (address

212) have been selected for 2 sides (address 213). The following options are possi-

ble:

•M1+M2,M3+M4, i.e. the 4 measuring location s are assigned: M1 and M2 to side S1,

M3 and M4 to side S2. This corresponds to the example in Figure 2-2 (M5 is not

assigned there).

•M1+M2+M3,M4, i.e. the 4 measuring locations are assigned : M1 and M2 and M3 to

side S1, M4 to side S2.

•M1,M2+M3+M4, i.e. the 4 measuring location s are assigned: M1 to side S1, M2 and

M3 and M4 to side S2.

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Address 224 ASSIGNM. 4M,3S appears if 4 assigned measuring locations (address

212) have been selected for 3 sides (address 213). The following options are possi-

ble:

•M1+M2,M3,M4, i.e. the 4 measuring locations are assigned: M1 and M2 to side S1,

M3 to side S2, M4 to side S3. This corresponds to the examp les in Figures 2-3 and

2-5.

•M1,M2+M3,M4, i.e. the 4 measuring locations are assigned: M1 to side S1, M2 and

M3 to side S2, M4 to side S3.

•M1,M2,M3+M4, i.e. the 4 measuring locations are assigned: M1 to side S1, M2 to

side S2, M3 and M4 to side S3.

Address 225 ASSIGNM. 4M,4S appears if 4 assigned measuring locations (address

212) have been selected for 4 sides (address 213). Only one option is possible:

•M1,M2,M3,M4, i.e. the 4 measuring locations are assigned: M1 to side S1, M2 to

side S2, M3 to side S3, M4 to side S4.

Address 226 ASSIGNM. 5M,2S appears if 5 assigned measuring locations (address

212) have been selected for 2 sides (address 213). The following options are possi-

ble:

•M1+M2+M3,M4+M5, i.e. the 5 measuring locations are assigned: M1 and M2 and

M3 to side S1, M4 and M5 to side S2.

•M1+M2,M3+M4+M5, i.e. the 5 measuring locations are assigned: M1 and M2 to side

S1, M3 and M4 and M5 to side S2.

•M1+M2+M3+M4,M5, i.e. the 5 measuring locations are assigned: M1 and M2 and

M3 and M4 to side S1, M5 to side S2.

•M1,M2+M3+M4+M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

and M3 and M4 and M5 to side S 2.

Address 227 ASSIGNM. 5M,3S appears if 5 assigned measuring locations (address

212) have been selected for 3 sides (address 213). The following options are possi-

ble:

•M1+M2,M3+M4,M5, i.e. the 5 measuring locations are assigned: M1 and M2 to side

S1, M3 and M4 to side S2, M5 to side S3.

•M1+M2,M3,M4+M5, i.e. the 5 measuring locations are assigned: M1 and M2 to side

S1, M3 to side S2, M4 and M5 to side S3.

•M1,M2+M3,M4+M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

and M3 to side S2, M4 and M5 to side S3.

•M1+M2+M3,M4,M5, i.e. the 5 measuring locations are assigned: M1 and M2 and

M3 to side S1, M4 to side S2, M5 to side S3.

•M1,M2+M3+M4,M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

and M3 and M4 to side S2, M5 to side S3.

•M1,M2,M3+M4+M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

to side S2, M3 and M4 and M5 to side S3.

Address 228 ASSIGNM. 5M,4S appears if 5 assigned measuring locations (address

212) have been selected for 4 sides (address 213). The following options are possi-

ble:

•M1+M2,M3,M4,M5, i.e. the 5 measuring locations are assigned: M1 and M2 to side

S1, M3 to side S2, M4 to side S3, M5 to side S4.

•M1,M2+M3,M4,M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

and M3 to side S2, M4 to side S3, M5 to side S4.

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•M1,M2,M3+M4,M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

to side S2, M3 and M4 to side S3, M5 to side S4.

•M1,M2,M3,M4+M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

to side S2, M3 to side S3, M4 and M5 to side S4.

Address 229 ASSIGNM. 5M,5S appears if 5 assigned measuring locations (address

212) have been selected for 5 sides (address 213). Only one option is possibl e:

•M1,M2,M3,M4,M5, i.e. the 5 measuring locations are assigned: M1 to side S1, M2

to side S2, M3 to side S3, M4 to side S4, M5 to side S5.

Assignment of

Sides in Auto-

Transformers

If auto-transformers are protected the additional question arises how the sides of the

protected object are to be handled by the main protection function, the differential pro-

tection. As mentioned above, various possibilities exist how the sides are defined.

Further information is ne cessary in order to achieve an exact replica of the auto-trans-

former. Therefore, the following addresses only app ly to auto-transformers (add ress

105 PROT. OBJECT = Autotransf. or Autotr. node).

Both of the following tables show which version of configuration is supported for

Autotransf. and for a Autotr. node and which principle of the transformer is ap-

plied. The earth winding is included as a side due to the parameterisation.

Table 2-2 Configuration Versions in an auto transformer

Table 2-3 Configuration Versions in an auto transformer node

address 241 SIDE 1 of the auto-transformer must be assigned to a auto-

connected (primary winding, as recommended above). This is imperative and, there-

fore, cannot be changed.

Address 242 SIDE 2 of the auto-transformer must also be assigned to an auto-

connected (secondary tap as recommended above). This is imperative and, there-

fore, cannot be changed.

For the sides 3 and 4, alternat ives exist. If the auto-transformer provides a nother tap ,

the side thereof is declared as auto-connected.

Number

of sides Configuration types of the side

SIDE 1 SIDE 2 SIDE 3 SIDE 4

2 auto-connected auto-connected — —

3 auto-connected auto-connected auto-connected —

3 auto-connected auto-connected compensation. —

3 auto-connected auto-connected earth.electrode —

4 auto-connected auto-connected auto-connected auto-connected

4 auto-connected auto-connected auto-connected compensation.

4 auto-connected auto-connected auto-connected earth.electrode

4 auto-connected auto-connected compensation. auto-connected

4 auto-connected auto-connected compensation. compensation.

4 auto-connected auto-connected compensation. earth.electrode

Number

of sides Configuration types of the side

SIDE 1 SIDE 2 SIDE 3 SIDE 4

3 auto-connected auto-connected earth.electrode —

4 auto-connected auto-connected auto-connected earth.electrode

2 Functions

60 7UT613/63x Manual

C53000-G1176-C160-2

In the example in figure 2-6 is for a PROT. OBJECT = Autotransf. the side S3 the

tertiary winding, thus the accessible and load capable compensation winding. In this

example th e set tin g wou ld be:

Address 243 SIDE 3 = compensation.

This option is only possible for PROT. OBJECT = Autotransf..

In the examples of figure 2-7 for PROT. OBJECT = Autotr. node side 3 is facing

the earthing el ectrode of the transformer. Here:

Address 243 SIDE 3 = earth.electrode.

This option is only possible if PROT. OBJECT = Autotransf. or if PROT. OBJECT

= Autotr. node, if no further side has been assigned.

The same applied to address 244 SIDE 4 = earth.electrode

In summary we can say: the sides S1 and S2 are imperatively assigned to the connec-

tions of the auto-con nected winding. For SIDE 3 and SIDE 4 you have to select the

option correspondin g to the topolog y: auto-connected (for another tap of the auto-

connected winding), compensation (for an accessible and load-capab le compensa-

tion winding) or earth.electrode (for the earthed side of the auto-connected wind-

ings).

Assignment of Au x-

iliary 1-phase Mea-

suring Locations

Each of the auxiliary (1-phase) current inputs must now be assigned in the addresses

251 to 254. The number of auxiliary inputs depends on the device type (cf. Table 2-

1). In 7UT635 all inputs IX1 to IX3 are only availabl e as additional 1-phase measuring

inputs if they are not needed for a fifth 3-ph ase measuring location, i.e. if only four 3-

phase measuring locations are needed.

The auxiliary inputs can be assigned to a side or a measuring location, or they can

remain non-assig ned. If you have assigned exactly one measu ring location to a side,

this side is equivalent to the measuring location.

Single-phase auxiliary measured currents are used in the following cases:

1. In dif ferential protection, to include the starpoin t current of an earthed transformer

winding (either directly or via a neutral earthing reactor in the protected zone);

2. In restricted earth fault protection, to compare the starpoint current of an earthed

winding (transformer, generator, motor, shunt reactor, neutral earthing reactor)

with the zero seque nce current from th e ph ase currents;

3. In ea rth fault overcurrent p rotection, to detect the earth fa ult current of an earthed

winding or neutral earthin g reactor;

4. In single-phase overcurrent protection, to detect any 1-phase current ;

5. For operational limit monitoring tasks and/or display of measured values.

2.1 General

7UT613/63x Manual

C53000-G1176-C160-2

• 1st case: It is essential to assign the 1-phase input to that side of the main protected

object whose incoming phase currents are to be compared with the earth fault cur-

rent. Make sure that you assign the 1-phase input to the correct side. In case of

transformers, this can only be a side with an earthed starpoint (directly or via a

neutral eart hin g tran sf or me r in the pr ot ected zone).

In the example shown in Figure 2-2, the auxiliary measuring location X3 must be

assigned to side S1. Once the device has been "informed" of this assignment, the

current measured at current input IX3 will be reliably interpreted as the current

flowing to the starpoint of the high-voltage winding (side 1).

in the example shown in Figure 2-6 the additional measur ing location X3 must be

assigned to the common winding. This winding, however, has 2 sides with 2 three-

phase measuring locations. X3 is assigned to side S1. Since the device has been

informed in address 105 PROT. OBJECT = Autotransf. that the protected object

is an auto-transformer, and via the assignment of sides 1 and 2 that these belong

to the common winding, it is obvious that X3 belongs to the common winding, and

that it is therefor e ass ign e d to sid esS1 and S2. The result is the same if X3 is as-

signed to side S2. For the auto-transformer, it is therefore irrelevant which voltage

side of the common winding (st art of winding or an y t ap) the sta rpoint curren t is as-

signed to.

• 2nd case: For this case, the same considerations apply as for the 1st case. In the

case of generators, motors or shunt reactors, select th e terminal side. You can also

use in the 2nd case a measurin g location that is not assigned to the main protected

object. In the example shown in Figure 2-3, you can use the restricted earth fault

protection for the neutral reactor: The auxiliary measuring location X4 is in this case

assigned to the measuring location M5. This infor ms the device that the measured

values of the non-assigned measuring location M5 (3-phase) must be compared

with the measured value of the additional measuring location X4 (1-phase).