SENTRON
Overvoltage Protection Devices
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© Siemens AG 2016
Siemens · 10/2015
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2Introduction
35SD7 lightning arresters, type 1
55SD7 combination surge arresters,
type 1 + type 2
75SD7 combination surge arresters,
type 1 / type 2
95SD7 surge arresters, type 2
12 5SD7 surge arresters, type 3
14 Configuration
26 5SD7 surge arresters, for
measuring and control technology
Overvoltage Protection Devices
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© Siemens AG 2016
2Siemens · 10/2015
Introduction
Overvoltage Protection Devices
■
Overview
Devices Page Application Standards
5SD7 lightning arresters,
type 1
3With plug-in protective modules for TN-C, TN-S and
TT systems.
Rated voltage 350 V AC for lightning currents
from 25 kA to 100 kA.
All versions with remote signaling contact.
For installation in main distribution boards, upstream or
downstream of the counter.
EN 61643-11
5SD7 combination surge arresters,
type 1 + type 2
5With plug-in protective modules for TN-C, TN-S and
TT systems.
Rated voltage 350 V AC for lightning currents
from 25 kA to 100 kA.
All versions with remote signaling contact.
For installation in main distribution boards downstream
of the counter.
EN 61643-11
5SD7 combination surge arresters,
type 1 / type 2
7With plug-in protective modules for TN-C, TN-S and
TT systems.
Rated voltage 335 V AC for lightning currents or
discharge surge currents up to 50 kA.
Versions with or without remote signaling.
EN 61643-11
5SD7 surge arresters,
type 2
9With plug-in protective modules for TN-C, TN-S and
TT systems.
Rated voltage 350 V AC, rated discharge surge current
20 kA and discharge surge current 40 kA.
For installation in sub-distribution boards.
EN 61643-11
5SD7 surge arresters,
type 3
12 With plug-in protective modules for single-phase and
three-phase systems.
Rated voltage, single-phase 24 V, 120 V, 230 V AC/DC
and three-phase 230/400 V AC.
For installation as close as possible upstream from the
terminal equipment.
EN 61643-11
Configuration 14 Everything you need to know about overvoltage
protection:
Function, mounting and technical connections.
5SD7 surge arresters,
for measuring and control
technology
26 With plug-in protective modules for measuring and
control technology for installation in signal circuits. EN 61643-21
I201_13815
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Overvoltage Protection Devices
5SD7 lightning arresters, type 1
■
Overview
Type 1 lightning arresters are the most powerful overvoltage
protection. They protect low-voltage systems against any
overvoltage or high impulse currents that may be triggered
by a direct or indirect lightning strike.
All lightning arresters are fitted with a mechanical fault indica-
tion, which does not require an extra power supply. For this
reason, the lightning conductors can also be used in the
precounter area.
The protective modules are available as connectors. The
majority of lightning arresters have a remote signaling contact,
which signals if the device fails.
■
Technical specifications
5SD7411-2 5SD7412-1 5SD7413-1 5SD7414-1
Standards IEC 61643-11 (DIN VDE 06754-6)
Approvals KEMA, UL/cUL UL/cUL UL/cUL
Rated voltage U
N
V AC 690 240 240/415
Rated arrester voltage U
C
• L-N, N-PE, L-(PE)N V AC 800 350 350 350
Lightning impulse current I
imp
(10/350 μs)
• L-N or L-(PE)N, 1P/3P kA 35 25 25/75 25/75
•N-PE kA -- 100 -- 100
Rated discharge surge current I
n
(8/20 μs)
• L-N or L-(PE)N, 1P/3P kA 35 25 25/75 25/75
•N-PE kA -- 100 -- 100
Protection level U
p
• L-(PE)N kV ≤ 4.50 ≤ 1.50 ≤ 1.50 ≤ 1.50
•L-PE kV -- ≤ 2.50 -- ≤ 2.50
•N-PE kV -- ≤ 1.50 -- ≤ 1.50
Follow current discharge capacity I
fi
(AC)
• L-N or L-(PE)N for 264 V/350 V kA -- 50/25 50/25 50/25
•N-PE A -- 100 -- 100
Response time t
A
• L-N or L-(PE)N ns ≤ 100 ≤ 100 ≤100 ≤ 100
• L-(N)-PE ns -- ≤ 100 -- ≤ 100
Max. back-up fuse acc. to IEC 61643-1
• For parallel connection A 400 gL/gG 315 gL/gG 315 gL/gG 315 gL/gG
• For series connection A 125 gL/gG 125 gL/gG 125 gL/gG 125 gL/gG
Short-circuit strength
With max. back-up fuse kA
rms
50 50 50 50
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
16 ... 50 2.5 ... 25 2.5 ... 25 2.5 ... 25
• Solid mm
2
16 ... 50 2.5 ... 35 2.5 ... 35 2.5 ... 35
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5SD7 lightning arresters, type 1
Overvoltage Protection Devices
■
Dimensional drawings
2P 3P 4P
5SD7412-1 5SD7413-1 5SD7414-1
1P
5SD7411-2
45
90
99
43,5
6,7
64
72 108 144
RS = remote signaling
RS
I201_18950
Cu
Al
128,5
191
56
280
225
I201_18957
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Overvoltage Protection Devices
5SD7 combination surge arresters, type 1 + type 2
■
Overview
Combination surge arresters type 1 + 2 are compact designs
comprising lightning arresters (type 1) and surge arresters
(type 2). They protect low-voltage systems against overvoltages
triggered by lightning strikes or by switching operations in the
network.
A thermal isolating arrester for the varistors offers a high degree
of protection against overload. The protective modules are
available as connectors. All combination surge arresters have
a remote signaling contact, which signals if the device fails.
■
Technical specifications
5SD7442-1 5SD7443-1 5SD7444-1
Standards IEC 61643-11; EN 61643-11
Approvals KEMA, UL/cUL
Rated voltage U
N
V AC 240 240/415
Rated arrester voltage U
C
• L-N, N-PE, L-(PE)N V AC 350
Lightning impulse current I
imp
(10/350 μs)
• L-N or L-(PE)N, 1P/3P kA 25 25/75 25/75
•N-PE kA 100 -- 100
Rated discharge surge current I
n
(8/20 μs)
• L-N or L-(PE)N, 1P/3P kA 25 25/75 25/75
•N-PE kA 100 -- 100
Protection level U
p
• L-(PE)N kV ≤ 1.50 ≤ 1.50 ≤ 1.50
•L-PE kV ≤ 2.20 -- ≤ 2.20
•N-PE kV ≤ 1.50 -- ≤ 1.50
Follow current discharge capacity I
fi
(AC)
• L-N or L-(PE)N kA 25 25 25
•N-PE kA 100 -- 100
Response time t
A
• L-N or L-(PE)N ns ≤ 100 ≤ 100 ≤ 100
• L-(N)-PE ns ≤ 100 -- ≤ 100
Max. back-up fuse Acc. to IEC 61643-1
• For parallel connection A 315 gL/gG
• For series connection A 125 gL/gG
Short-circuit strength with max. back-up fuse kA
rms
25
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
2.5 ... 25
• Solid mm
2
2.5 ... 35
Mounting width Acc. to DIN 43880 MW 4 6 8
Visual function/fault indication Yes
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5SD7 combination surge arresters, type 1 + type 2
Overvoltage Protection Devices
■
Dimensional drawings
2P 3P 4P
5SD7442-1 5SD7443-1 5SD7444-1
72 108 144 I201_18951
45
90
99
43,5
6,7
64
RS = remote signaling
RS
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Overvoltage Protection Devices
5SD7 combination surge arresters, type 1 / type 2
■
Overview
Combination surge arresters type 1 / 2 are compact designs
which can be used as both lightning arresters type 1 and surge
arresters type 2.
They protect low-voltage systems against overvoltages trig-
gered by lightning strikes or by switching operations in the
network.
A thermal isolating arrester for the varistors offers a high degree
of protection against overload. The protective modules are
available as connectors. The combination surge arresters can
be fitted either with or without a remote signaling contact, which
signals if the device fails.
■
Technical specifications
■
Dimensional drawings
5SD7411-2 5SD7412-2
5SD7412-3
5SD7413-2
5SD7413-3
5SD7414-2
5SD7414-3
5SD7483-6
5SD7483-7
Standards IEC 61643-11 EN 50539
Approvals KEMA, UL/cUL KEMA
Rated voltage U
N
V AC 690 240 240/415 --
Rated arrester voltage U
C
• L-N, N-PE, L-(PE)N V 800 AC 335 AC 1000 DC
Lightning impulse current I
imp
(10/350 μs)
• L-N or L-(PE)N, 1P/3P kA 35 12.5 12.5/37.5 12.5 ≤ 5
•N-PE kA -- 50 -- 50 --
Rated discharge surge current I
n
(8/20 μs)
• L-N or L-(PE)N, 1P/3P kA 35 12.5 12.5/37.5 12.5/50 15
•N-PE kA -- 50 -- --
Max. discharge surge current I
n
(8/20 μs)
•L-N kA 100 12.5 50/150 50 40
•N-PE kA -- 50 -- 50 --
Protection level U
p
• L-(PE)N kV ≤ 4.50 ≤ 1.20 ≤ 1.20 ≤ 1.20 ≤ 3.50
•L-PE kV -- -- -- -- --
•N-PE kV -- ≤ 1.70 -- ≤ 1.70 --
Response time t
A
• L-N or L-(PE)N ns ≤ 100 ≤ 25
• L-(N)-PE ns -- ≤ 100 -- ≤ 100 ≤ 25
Max. back-up fuse acc. to IEC 61643-1
• For parallel connection A 400 gL/gG 160 gL/gG --
• For series connection A 125 gL/gG 80 gL/gG --
Short-circuit strength
With max. back-up fuse kA
rms
50 25
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
16 ... 50 1.5 ... 25
• Solid mm
2
16 ... 50 1.5 ... 35
1P 2P 2P
5SD7411-2 5SD7412-2 5SD7412-3
128,5
191
56
280
225
I201_18958
4522,5
90
51,5
70
77,5
35,6
I201_19197
4522,5
90
97
51,5
70
77,5
35,6
RS = remote signaling
RS
I201_19196
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5SD7 combination surge arresters, type 1 / type 2
Overvoltage Protection Devices
Installation distance between adjacent products
Only valid for 5SD7483-6 and 5SD7483-7
3P 4P 3P
5SD7413-2
5SD7413-3 5SD7414-2
5SD7414-3 5SD7483-6
5SD7483-7
54
I201_18541
45
90
99
43,5
6,7
72
70
RS
4522,5
90
99
51,5
64
71,5
53,5
I201_19198
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Overvoltage Protection Devices
5SD7 surge arresters, type 2
■
Overview
Surge arresters type 2 are used downstream of lightning
arresters type 1 in main distribution boards or sub-distribution
boards. They protect low-voltage systems against transient
overvoltages, such as those triggered by switching operations.
A thermal isolating arrester for the varistors offers a high degree
of protection against overload. The protective modules are
available as connectors. The surge arresters have an optional
remote signaling contact, which signals if the device fails.
■
Technical specifications
Standard design
N-PE
5SD7481-0 5SD7461-0
5SD7461-1
5SD7481-1 5SD7463-0
5SD7463-1
5SD7464-0
5SD7464-1
5SD7473-1 5SD7483-5
Standards IEC 61643-11; EN 61643-11
Approvals KEMA -- KEMA,
UL/cUL
Rated voltage U
N
V AC 240 240 690 240/415 240/415 500 554/960
Rated arrester voltage U
C
•L-N V AC -- 350 800 -- -- -- 760
• L-N or L-(PE)N V AC -- -- -- 350 350 580 --
•N-PE V AC 260 -- -- -- 260 -- --
Rated discharge surge current I
n
(8/20 μs)
•L-N kA -- 20 15 -- -- -- 15
• L-N or L-(PE)N, 1P kA -- -- -- 20 20 15 --
•N-PE kA 20 -- -- -- 20 -- --
Max. discharge surge current I
n
(8/20 μs)
•L-N kA -- 40 30 -- -- -- 30
• L-N or L-(PE)N, 1P kA -- -- -- 40 40 -- --
• L-N or L-(PE)N, 1P/multi-pole kA -- -- -- -- -- 30 --
•N-PE kA 40 -- -- -- 40 -- --
Lightning impulse current I
imp
(10/350 μs) kA 12 --
Protection level U
p
• L-(PE)N kV -- ≤ 1.50 ≤ 5 ≤ 1.50 ≤ 1.60 ≤ 2.50 ≤ 2.90
•L-PE kV -- -- ≤ 5 -- ≤ 1.90 ≤ 2.50 --
•N-PE kV ≤ 1.50 -- -- -- ≤ 1.50 -- --
Response time t
A
• L-N or L-(PE)N ns -- ≤ 25 ≤ 100 ≤ 25 ≤ 25 ≤ 25 ≤ 25
•N-PE ns ≤ 100 -- -- -- ≤ 100 -- --
Max. back-up fuse acc. to IEC 61643-1
• For parallel connection A -- 125 gL/gG 100 gL/gG 125 gL/gG 100 gL/gG
• For series connection A -- -- 80 gL/gG 80 gL/gG 80 gL/gG
Short-circuit strength
With max. back-up fuse kA
rms
25
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
1.5 ... 25
• Solid mm
2
1.5 ... 35
Mounting width according to DIN 43880 MW 1 1 2 3 4 3 3
Visual function/fault indication Yes
PH_06.book Seite 9 Freitag, 5. Februar 2016 11:41 11
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5SD7 surge arresters, type 2
Overvoltage Protection Devices
Narrow design
5SD7422-0
5SD7422-1
5SD7424-0
5SD7424-1
Standards IEC 61643-11 (DIN VDE 06754-6)
Approvals KEMA/UL/cUL
Rated voltage U
N
V AC 240 240/415
Rated arrester voltage U
C
• L-N or L-(PE)N V AC 350 350
•N-PE V AC 264 264
Rated discharge surge current I
n
(8/20 μs)
• L-N or L-(PE)N, 1P/3P kA 20 20
•N-PE kA 20 20
Max. discharge surge current I
n
(8/20 μs)
• L-N or L-(PE)N, 1P/3P kA 40 40
•N-PE kA 40 40
Protection level U
p
• L-(PE)N kV ≤ 1.50 ≤ 1.50
•L-PE kV -- --
•N-PE kV ≤ 1.50 ≤ 1.50
Response time t
A
•L-N ns ≤ 25 ≤ 25
•N-PE ns ≤ 100 ≤ 100
Max. back-up fuse Acc. to IEC 61643-1
• For parallel connection A 315 gL/gG
• For series connection A 63 gL/gG
Short-circuit strength with max. back-up fuse kA
rms
25 25
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
1.5 ... 16
• Solid mm
2
1.5 ... 25
Mounting width Acc. to DIN 43880 mm 26 50
Visual function/fault indication Yes
Remote signaling contact
Remote signaling (RS) Yes
Contact type Floating CO contact (plug-in)
Operational voltage, max. V AC 250
V DC 125
Operational current, max.
• Resistive/inductive load A AC 1/1
• Resistive/inductive load mA DC 200/30
Conductor cross-section
• Finely stranded mm
2
1.5
• Solid mm
2
1.5
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Overvoltage Protection Devices
5SD7 surge arresters, type 2
■
Dimensional drawings
Surge arresters, standard design Surge arresters, narrow design
1P
5SD7461-0, 5SD7481-0 without RS
5SD7461-1 with RS
3P
5SD7463-0
5SD7463-1, 5SD7473-1
4P
5SD7424-0 without RS
5SD7424-1 with RS
I201_12703a
45
90
99
43,5
6,7
18
64
RS
RS = remote signaling
I201_12704a
45
90
99
43,5
6,7
54
64
RS
RS = remote signaling
45
90
43,5
6,7
50
64
I201_12701a
99
RS
RS = remote signaling
2P
5SD7422-0 without RS
5SD7422-1 with RS
4P
5SD7464-0
5SD7464-1
I201_12699a
45
90
43,5
6,7
26
64
99
RS
RS = remote signaling
I201_12705a
45
90
99
43,5
6,7
72
64
RS
RS = remote signaling
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5SD7 surge arresters, type 3
Overvoltage Protection Devices
■
Overview
Type 3 surge arresters are installed downstream of type 2 surge
arresters in sub-distribution boards as close as possible to the
load. The protective modules are available as connectors.
In the event of a power failure, a remote signaling is output over
an optocoupler with open collector output.
■
Technical specifications
2-pole 4-pole
5SD7432-1 5SD7432-2 5SD7432-4 5SD7434-1
Standards IEC 61643-11; EN 61643-11
Approvals KEMA/UL/cUL KEMA
Rated voltage U
N
V AC 230 120 24 230/400
Rated load current I
L
(at 30 °C) A 26 26 26 3 × 26
Rated arrester voltage U
C
V AC 264 150 34 335
Rated discharge surge current I
n
(8/20 μs)
kA 3 3 1 1.5
Combined surge U
oc
kV 6 6 2 4
Protection level U
p
L-N / L-PE, N-PE V ≤ 1350/≤ 1500 ≤ 850/≤ 950 ≤ 250/≤ 650 ≤ 1200/≤ 1500
Response time t
A
ns ≤ 100 ≤ 100 ≤100 ≤ 100
Required back-up fuse, max. A (gG/B/C) 25 25 25 25
Temperature range °C -40 ... +80
Degree of protection IP20, with connected conductors
Conductor cross-section
• Finely stranded mm
2
0.2 ... 2.5
• Solid mm
2
0.2 ... 4
Mounting width Acc. to DIN 43880 MW 1 1 1 2
Visual function/fault indication Yes
PH_06.book Seite 12 Freitag, 5. Februar 2016 11:41 11
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Overvoltage Protection Devices
5SD7 surge arresters, type 3
■
Dimensional drawings
Using the plug-in parts in the various overvoltage protection devices
2P 4P
5SD7432-. 5SD7434-1
Replacement plug 5SD7428-1 5SD7428-0 5SD7468-1 5SD7488-0 5SD7488-1 5SD7488-2 5SD7488-4 5SD7498-1 5SD7498-3
Surge arresters,
type 2
5SD7424-1
5SD7424-0
5SD7423-1
5SD7423-0
5SD7422-1
5SD7422-0
5SD7424-1
5SD7424-0
5SD7422-1
5SD7422-0
5SD7461-0
5SD7461-1
5SD7463-0
5SD7463-1
5SD7464-0
5SD7464-1
5SD7481-0
5SD7464-0
5SD7464-1
5SD7485-0
5SD7485-1 5SD7481-1
5SD7483-5 5SD7481-1 5SD7473-0
5SD7473-1
5SD7483-0
5SD7483-1
5SD7483-6
5SD7483-7
I201_12706
45
71
90
45
29
6,7
18
7911
58
81012
45
71
90
45
29
6,7
36
58
I201_12707
Replacement plug 5SD7437-1 5SD7437-2 5SD7437-3 5SD7437-4 5SD7438-1
Surge arresters, type 3 5SD7432-1 5SD7432-2 5SD7432-3 5SD7432-4 5SD7434-1
Replacement plug 5SD7428-1 5SD7448-1 5SD7418-0 5SD7418-1 5SD7418-2 5SD7418-3
Lightning arresters, type 1
and combination surge
arresters type 1+2
5SD7444-1
5SD7443-1
5SD7442-1
5SD7441-1
5SD7444-1
5SD7443-1
5SD7442-1
5SD7441-1
5SD7414-1
5SD7412-1
5SD7444-1
5SD7442-1
5SD7414-1
5SD7413-1
5SD7412-1
5SD7411-1
5SD7412-2
5SD7412-3
5SD7414-2
5SD7414-3
5SD7412-2
5SD7412-3
5SD7413-2
5SD7413-3
5SD7414-2
5SD7414-3
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Configuration
Overvoltage Protection Devices
■
Overview
Surge protection devices (SPD)
Surge protection devices are devices whose main components
comprise spark gaps (discharge paths) and/or voltage-depen-
dent resistors (varistors, suppressor diodes). Surge protection
devices serve to protect other electrical equipment and electri-
cal systems against unacceptably high overvoltages and to
establish equipotential bonding.
Surge protection devices are categorized:
a) According to their application:
• Surge protection devices for systems and devices in power
systems
• Surge protection devices for plants and devices in information
systems for protecting modern electronic devices in telecom-
munication and signal processing systems against the indi-
rect and direct effects of lightning strikes and other transient
overvoltages
• Spark gaps for grounding systems or for equipotential
bonding
b) According to their surge current discharge capacity and their
protective action:
• Type 1 lightning arresters for influences as a result of direct
or close-up strikes for the protection of installations and
equipment
• Type 1 + type 2 combination surge arresters in one device for
influences as a result of direct or close-up strikes for the pro-
tection of installations, equipment and terminal equipment
• Type 1 and type 2 surge arresters for remote strikes, switching
overvoltages, as well as electrostatic discharges for the pro-
tection of installations, equipment and terminal equipment
Requirement categories of arresters
Lightning current and overvoltage protection is only effective if
the pertinent insulation resistance of plant sections is also taken
into account. To do this, the impulse withstand voltage of the
different overvoltage categories is adapted to suit the protection
level U
p
of the different surge protection devices.
The international standard IEC 60664-1 (EN 60664-1) distin-
guishes between four chopped-wave withstand voltage catego-
ries for low-voltage devices. For low-voltage systems with a
rated voltage of 230/400 V in particular, the following categories
apply:
The following table shows the breakdown of lightning and surge
arresters into requirement categories.
Furthermore, the following country-specific product standards
also apply:
• Italy: CEI EN 61643-11
• Austria: ÖVE/ÖNORM E 8001
Note:
You can download the technical primer, "Lightning current and
overvoltage protection" on the Internet at:
www.siemens.com/lowvoltage/infomaterial
or obtain a copy from your local Siemens representative.
kWh
S
P
D
S
P
D
6 kV
4 kV
2,5 kV
< 4 kV
< 1,5 kV < 1,3 kV
S
P
D
Type 2 Type 3
Type 1Requirement
category
Rated impulse
withstand voltage
Protection level
I201_13943
Voltage surges
Category Impulse
withstand
voltage
Description
IV 6 kV Devices at the infeed of the installation,
e.g. main distribution boards, E-counters,
overcurrent protection devices, ...
III 4 kV Devices that are part of the permanent installation,
e.g. distribution boards, protective equipment, ...
II 2.5 kV Devices for connection to the permanent installa-
tion, e.g. household appliances
I 1.5 kV Extremely sensitive devices,
e.g. electronic devices
German Product
Standard
EN 61643-11
International Standard
IEC 61643-1
Designation
Type 1 Class I Lightning arresters
Type 2 Class II Surge arresters for
distribution boards
Type 3 Class III Surge arresters for
terminal equipment
PH_06.book Seite 14 Freitag, 5. Februar 2016 11:41 11
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Overvoltage Protection Devices
Configuration
Coordinated use of lightning and surge arresters
In practice, arresters of the different requirement categories are
switched in parallel. Due to their different operating characteris-
tics, discharge capacity and protection tasks, the different ar-
rester types must be installed in the system so that the nominal
values of the individual devices are not exceeded, thus ensuring
consistent protection.
In order to enable subsequent coupling, we recommend in-
serting an additional type 2 surge arrester every 10 m.
In order to ensure that a surge current always switches to the
nearest upstream arrester – if there is a risk that the surge current
could overload the respective arrester – it is necessary to take
energetic considerations into account.
This is called "energetic coordination" and must be established
between type 1 and type 2 arresters, as well as between type 3
arresters.
In the past, this was achieved through the laborious and costly
installation of decoupling reactors or sufficiently long cable
lengths. However, thanks to modern tripping technology, this is
no longer necessary.
Follow current discharge capacity
The data for the follow current discharge capacity of lightning
arresters indicates the maximum line current that the arrester is
capable of interrupting by itself without needing help to extin-
guish the fault from an upstream protective device, such as a
fuse or miniature circuit breaker. The follow current is a result of
the short circuit produced briefly by the lightning arrester to dis-
charge the lightning current. The follow current is therefore a
short-circuit current and has a frequency of 50 Hz.
If the maximum permissible short-circuit current of the plant is
smaller than the maximum follow current that can be extin-
guished by the SPD, no upstream protective device is required.
If this is not the case, a fuse or miniature circuit breaker is
required.
SPDs with miniature circuit breakers and fuses
Miniature circuit breakers or fuses perform the following tasks:
• Protect the SPD from overload in the event of overcurrent
• Ensure plant availability
• Help suppress system follow currents
Fuses or miniature circuit breakers therefore ensure that the
max. permissible peak current I
p max
and the maximum permis-
sible energy value I
2
t
max
of the SPD are not exceeded. This
prevents damage to the SPD.
We recommend using fuses rather than miniature circuit
breakers as they have a smaller voltage drop and ensure
better protection.
A distinction is generally made between 2 different connection
types:
• Series connection:
The installation is protected via the protective device that is
fitted in the power distribution as standard. The SPD is pro-
tected over the plant fuse installed in the system. If this fuse is
tripped because the SPD is overloaded, the plant is discon-
nected from the supply by the fuse or miniature circuit
breakers.
Recommended max. cable length for series connection
• Parallel connection:
The protective device is located in the connecting cable of the
SPD. If the miniature circuit breaker or fuse is tripped, the
power supply of the plant is maintained. In this case, we
recommend using a signaling device to signal that the over-
voltage protection function has been disconnected from the
supply and is therefore no longer effective.
Recommended max. cable lengths for parallel connections
Your configuration should take into account the values for the
maximum permissible arrester back-up fuses stipulated in the
technical specifications.
Generally speaking, a series connection is always preferable to
a parallel connection. This connection is particularly suitable for
reducing additional voltages on surge current cables.
Devices Maximum
permissible
energy value
Maximum per-
missible peak
current value
No protection
necessary if
I
2
t
max
I
p max
I
cc eff
kA
2
skA kA
Lightning arresters,
type 1 180 12 Up to 50
Combination surge
arresters,
type 1 + type 2
180 12 Up to 25
Surge arresters, type 2 180 12 Up to 25
PE
L
I201_13776a
≤ 0,5m
S
P
D
PAS
DIN V VDE V 0100-534;
IEC 60364-5-534
PAS = equipotential bonding strip
I201_13777a
L
b
a
S
P
D
PAS
DIN V VDE V 0100-534 (for a, b ≤ 0.5 m);
IEC 60364-5-534 (for a + b ≤ 0.5 m);
CEI 81-8:2002-02 (for a + b ≤ 0.5 m)
PAS = equipotential bonding strip
PH_06.book Seite 15 Freitag, 5. Februar 2016 11:41 11
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16 Siemens · 10/2015
Configuration
Overvoltage Protection Devices
Dimensioning of conductor cross-sections
The different conductor cross-sections (Lq 1 to Lq 3) must be
dimensioned according to the rated current of the miniature
circuit breaker or of the fuse.
Series connection
a) Protection of the SPD using miniature circuit breakers
b) Protection of the SPD using fuses
PAS = equipotential bonding strip
Parallel connection
a) Protection of the SPD using miniature circuit breakers
b) Protection of the SPD using fuses
In the case of surge arresters type 3, the following conductor
cross-sections are generally used:
• Rigid: up to 4 mm
2
• Flexible: up to 2.5 mm
2
Conductor cross-sections for lightning arresters (type 1) and
combination surge arresters (type 1 + type 2) for series connection
MCB/fuse (F1) upstream Lq 2 Lq 3
[A gL/gG] [mm
2
] [mm
2
]
25 10 16
35 10 16
40 10 16
50 10 16
63 10 16
80 16 16
100 25 16
125 35 16
Conductor cross-sections for surge arresters (type 2)
for series connection
MCB/fuse (F1) upstream Lq 2 Lq 3
[A gL/gG] [mm
2
] [mm
2
]
25 6 6
35 6 6
40 6 6
50 10 10
63 10 10
PE
I201_10791a
S
P
D
MCB
Lq2Lq1
Lq3
L1
PAS
PE
L1
F1
Lq2
Lq3
I201_10794a
S
P
D
Lq1
PAS
Conductor cross-sections for lightning arresters (type 1) and
combination surge arresters (type 1 + type 2) for parallel connection
MCB/fuse (F1) upstream Lq 2 Lq 3 F2 fuse
[A gL/gG] [mm
2
] [mm
2
][A gL/gG]
25 616 /
35 10 16 /
40 10 16 /
50 10 16 /
63 10 16 /
80 10 16 /
100 16 16 /
125 16 16 /
160 25 25 /
200 35 35 160
1)
250 35 35 160
1)
315 50 50 160
1)
> 315 50 50 160
1)
1)
Recommended fuse.
Conductor cross-sections for surge arresters (type 2)
for parallel connection
MCB/fuse (F1) upstream Lq 2 Lq 3 F2 fuse
[A gL/gG] [mm
2
] [mm
2
][A gL/gG]
25 6 6 /
32 6 6 /
40 6 6 /
50 6 6 /
63 10 10 /
80 10 10 /
100 16 16 /
125 16 16 /
> 125 16 16 125
I201_10790a
L1 Lq1 Lq2
Lq3
MCB
S
P
D
F2
PAS
I201_10793a
L1
Lq2
Lq1
F2
Lq3
F1
PAS
PH_06.book Seite 16 Freitag, 5. Februar 2016 11:41 11
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Overvoltage Protection Devices
Configuration
■
Circuit diagrams
Examples
Lightning arresters, type 1
Series connection Parallel connection
5SD7412-1 for TN-S/TT systems 5SD7413-1 for TN-C systems
5SD7414-1 for TN-S/TT systems
RS = Remote signaling
I201_13782b
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1
L1 L2 L3
N
RS
I201_13783b
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1
L1 L2 L3
N
F2
RS
N
PE
L1
N
PE
F1
I201_13778b
L1
L1
N
RS
I201_13780b
L1
PEN
L2
L3
F1
PEN
L1 L2 L3
PEN
L2
L3
L1
RS
I201_13782b
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1
L1 L2 L3
N
RS
PH_06.book Seite 17 Freitag, 5. Februar 2016 11:41 11
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Configuration
Overvoltage Protection Devices
Combination surge arresters, type 1 + type 2
Surge arresters, type 2
5SD7442-1 for TN-S/TT systems 5SD7443-1 for TN-C systems
5SD7444-1 for TN-S/TT systems
N
PE
L1
N
PE
F1
I201_13784b
L1
L1
N
RS
I201_13786b
L1
PEN
L2
L3
F1
PEN
L1 L2 L3
PEN
L2
L3
L1
RS
I201_13788b
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1
L1 L2 L3
N
RS
5SD7463-0/1 for TN-C systems 5SD7473-1 for IT systems
RS = Remote signaling
F1
L1
L2
L3
PEN
L1
L2
L3
PEN
F2
I201_13944
PEN
L1 L2 L3
RS
F1
L1
L2
L3
PE
L1
L2
L3
PE
F2
I201_13945
PE
L1 L2 L3
RS
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Overvoltage Protection Devices
Configuration
5SD7464-0/1 for TN-S systems 5SD7464-0/1 for TN-S/TT systems
5SD7422-0/1 for TN-S/TT systems 5SD7424-0/1 for TN-S/TT systems
RS = Remote signaling
I201_13946a
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1 F2
L1 L2 L3 N
PE
RS
I201_13947a
L1
L2
L3
N
PE
L1
L2
L3
N
F1 F2
L1 L2 L3 N
PE
RS
I201_13791a
RS
L1
N
PE
L1
N
PE
F1
PE L1
N
F2
I201_13795a
RS
L1
L2
L3
N
PE
L1
L2
L3
N
PE
F1
PE L1 L2 L3
N
F2
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Configuration
Overvoltage Protection Devices
Surge arresters, type 3
Surge arresters, photovoltaic type
5SD7432-1/2/4 for TN-S/TT systems 5SD7434-1 for TN-S-/TT systems
Due to the combination of three power varistors, the overvoltage
protection required for the inverters is implemented on the
DC side.
On the AC side, the overvoltage protection can be ensured
using surge arresters type 2 (5SD7422-. or 5SD7424-.).
5SD7483-6/7
F1
I201_13802b
135
246
L1
N
PE
L1
N
PE
IN
OUT
79
135
810
246
11 12
I201_13803b
L1
L2
L3
N
PE
F1
L1
L2
L3
N
PE
IN
OUT
I201_13949
L+ PE L-
PEL N
L+ L-
L
N
PE
L
N
PE
Switch
Converter
Photovoltaic
generator
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Overvoltage Protection Devices
Configuration
Scope when installing overvoltage protection systems
The scope of IEC 60364-4-443 – Electrical installations of
buildings, Protection for safety; Protection against voltage distur-
bances and electromagnetic disturbances – extends from the
protective device over the counter, through to the socket outlet.
The scope of IEC 61024-1 – Protection of structures against
lightning – and IEC 61312-1 – Protection against lightning
electromagnetic impulse – extends from the incoming main
feeder box through to the socket outlet and includes grounding
measures for SPDs.
If a lightning protection equipotential bonding is installed, it must
be connected to the base points of the overvoltage protection
devices.
TN-C systems
TN-S system
TT system
PAS = Equipotential bonding strip
RCD (Residual Current Device): Residual current-operated circuit breakers
L1
L2
L3
N
PE
kWh
F3
F2F2
F1
PEN
PAS
I201_13773a
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
TN-C system
Lightning
arrester
Plant grounding
Device protection
Lightning protection
equipotential bonding
L1
L2
L3
N
PE
kWh
F3
F2
F1
PEN
PAS
I201_13774a
F2
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
TN system
Lightning
arrester
Plant grounding
Device protection
Lightning protection
equipotential bonding
If a lightning protection equipotential
bonding is installed, it must
be connected to the base points of
the overvoltage protection
devices.
*)
L1
L2
L3
N
PE
kWh
F3
F2
F1
PAS
I201_13775a
F2
RCD
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
S
P
D
Plant grounding
Device protection
Lightning arrester
TT system
Lightning protection
equipotential bonding
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Configuration
Overvoltage Protection Devices
■
More information
Rated arrester voltage U
C
The highest continuous voltage (maximum permissible opera-
tional voltage) is the r.m.s. value of the maximum voltage that
can be applied under field conditions to the terminals of the
overvoltage protection device as specified on the respective
terminal. It is the maximum voltage that can be applied to the
arrester in a defined, non-conductive state that, after it has
tripped and discharged, still ensures that this state can be
restored. The value of U
C
is based on the rated voltage of the
system to be protected and the specifications of the installation
regulations (DIN VDE 0100-534).
Break time t
a
The break time is the time required to automatically switch off the
power supply in the event of a fault in the electrical circuit or
equipment being protected. The break time is an application-
specific value, which is derived from the level of fault current
flowing and the characteristic of the protective device.
Response time t
A
Response times largely characterize the response behavior of
the individual protective elements used in arresters. Depending
on the rate of rise du/dt of the surge voltage or di/dt of the surge
current, response times may change within specific limits.
Versions for Austria
The standard ÖVE/ÖNORM E 8001-1 is generally applied in
Austria – with relevant supplements.
The key difference for implementation of devices of type 2 is that
these have to have a higher rated voltage (335 V AC, 440 V AC).
Breaking capacity, follow current discharge capacity I
fi
The breaking capacity is the prospective r.m.s. value of the
follow current that can be extinguished by the overvoltage pro-
tection device on its own when U
C
is applied. This is proven in
the operating duty test according to EN 61643-11.
Operating temperature range
The operating temperature range specifies the range within
which the devices can be used. In the case of devices without
self-heating, this is identical to the ambient temperature range.
The temperature rise in devices with self-heating must not
exceed the specified maximum value.
Lightning impulse current I
imp
The lightning impulse current is a standardized surge current
curve with waveform 10/350
μ
s. With its parameters (peak value,
load, specific energy) it simulates the load of natural lightning
currents. Lightning and combination surge arresters must be
capable of repeatedly discharging these types of lightning im-
pulse currents.
Insertion loss a
E
At a specified frequency, the insertion loss of a overvoltage
protection device is described by the ratio of the voltage value
at the installation site before and after insertion of the over-
voltage protection device. Unless otherwise specified, this is
based on a 50 Ω system.
Frequency range
The frequency range characterizes the transmission band or let-
through frequency of the arrester, depending on the described
damping characteristics.
Limit frequency f
G
The limit frequency describes the frequency-dependent be-
havior of an arrester. The limit frequency is the respective fre-
quency that produces an insertion loss under specific test
conditions (a
E
) of 3 dB (see EN 61643-21). Unless otherwise
specified, this is based on a 50 Ω system.
Categories according to IEC 61643-21 (DIN VDE 0845-3-1)
In order to test the current carrying capacity and the voltage
limitation during pulse interference, the standard IEC 61643-21
(DIN 0845-3-1) describes a range of surge voltage and surge
current impulses. All Siemens overvoltage protection devices
exceed these values in the depicted categories. For this reason,
the explicit value for the surge current carrying capacity is
derived from the specified rated discharge surge current (8/20)
and lightning impulse current (10/350).
Combined surge U
oc
The combined surge is produced by a hybrid generator
(1.2/50
μ
s, 8/20
μ
s) with a fictitious impedance of 2 Ω. The no-
load voltage of this generator is indicated as U
oc
. The specifica-
tion of U
oc
is primarily achieved with arresters of type 3.
Short-circuit strength
The value of the prospective short-circuit current that can be
controlled by the overvoltage protection device if the respective
back-up fuse is connected.
Maximum discharge surge current I
max
The maximum peak value of the surge current with the waveform
8/20
μ
s that the device can safely discharge.
Rated discharge surge current I
n
The rated discharge surge current is the peak value of a surge
current of the waveform 8/20
μ
s for which the overvoltage pro-
tection device is designed in accordance with a specified test
program.
Rated load current (rated current) I
L
The rated load current is the highest permissible operational
current that can be continuously routed over the terminals with
this specification.
Rated voltage U
N
This corresponds to the rated voltage of the system to be pro-
tected. In the case of information systems, the rated voltage
usually serves as the type rating. In the case of AC voltage, it is
specified as the r.m.s. value.
Line-side overcurrent protection/discharge back-up fuses
An overcurrent protection device (e.g. fuse or miniature circuit
breaker) that is located outside the arrester on the infeed side
and serves to interrupt the line-frequency follow current if the
breaking capacity of the overvoltage protection device is
exceeded.
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Overvoltage Protection Devices
Configuration
N-PE arrester
Protective devices that are intended solely for installation
between the N and PE conductor.
Operating loss
In high-frequency applications, the operating loss indicates how
many parts of the "advancing" wave are reflected at the protec-
tive device ("transition point"). This is a direct benchmark for how
well suited a protective device is to the surge impedance of the
system.
Screening attenuation
Ratio of feeding power of a coaxial cable to that of the radiated
power of the cable supplied by the outer conductor.
Protective conductor current I
PE
The current that flows through the PE terminal connection when
the overvoltage protection device is connected to the rated
arrester voltage U
C
without any load-side consumers.
Protection level U
p
The protection level of a surge protective device is the highest
instantaneous value of the voltage at the terminals of an over-
voltage protection device, determined from standardized indi-
vidual tests:
• Lightning impulse sparkover voltage 1.2/50
μ
s (100 %)
• Operational voltage at a rate of rise 1 kV/
μ
s
• Residual voltage U
res
for rated discharge current
The protection level characterizes the capability of an over-
voltage protection device to limit overvoltages to a residual level.
When used in power systems, the protection level determines
the mounting location with regard to overvoltage category acc.
to DIN VDE 0110-1, -11.
In the case of overvoltage protection devices used in information
systems, the protection level must be adapted to the immunity
to interference of the equipment to be protected
(EN 61000-4-5, -12).
Protection circuit
Protection circuits are multi-step cascading protective devices.
The individual protection steps can be made up of discharge
paths, varistors and/or semiconductor devices. The energetic
coordination of the individual protection steps is achieved using
decoupling elements.
Series impedance
The impedance in signal flow direction between the input and
output of an arrester.
Thermal isolating arrester
Overvoltage protection devices for power systems that are
equipped with voltage-dependent resistors (varistors) have an
integral isolating arrester, which disconnects the overvoltage
protection device from the mains in the event of an overload and
displays this operating state. The isolating arrester reacts to
"joule heat" generated by an overloaded varistor and discon-
nects the overvoltage protection device from the mains if a
specific temperature is exceeded. The isolating arrester discon-
nects the overloaded overvoltage protection device from the
mains so fast that any risk of fire is prevented. However, it is not
the task of an isolating arrester to ensure "protection against
indirect contact".
Symbols
Circuit symbol Description
Surge protection device
(SPD)
Lightning arresters, type 1
Surge arresters type 2 or type 3
Tripped spark gap
Varistor
Spark gap
Gas-filled surge arrester
Plug-in contact
Suppressor diode
S
P
D
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Configuration
Overvoltage Protection Devices
Selection of overvoltage protection devices
Situation Systems Basic protection
Which type of building do you
want to protect?
Generally all our devices are
suitable for residential build-
ings, office buildings, industrial
and commercial buildings.
For installation upstream of counters in main distribution boards
or in combined main/sub-distribution boards
Low risk buildings
- No external lightning
protection
- Power supply
via ground conductor
TN-S and TT system Surge arresters, type 2
5SD7424-0, 5SD7424-1, 5SD7464-0, 5SD7464-1
Combination surge arresters, type 1 / type 2
5SD7414-2, 5SD7414-3
TN-C system Surge arresters, type 2
5SD7423-0, 5SD7423-1, 5SD7463-0, 5SD7463-1
Combination surge arresters, type 1 / type 2
5SD7413-2, 5SD7413-3
High-risk buildings
- External lightning
protection system
- Power supply
via overhead lines
- Grounded antenna
structures
TN-S and TT system Lightning arresters, type 1
5SD7414-2, 5SD7414-3, 5SD7414-1
TN-C system Lightning arresters, type 1
5SD7413-2, 5SD7413-3, 5SD7413-1
TN-S and TT system Combination surge arresters, type 1 + type 2
5SD7444-1
TN-C system Combination surge arresters, type 1 + type 2
5SD7443-1, 5SD7441-1
IT systems
without N conductor incorporated
in the cable
Typically, IT systems are only installed in special
building sections. In the area of the main distribution
board, TN-C-, TN-S or TT systems are generally still
used. In this case, the protective devices shown
above must be installed.
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Overvoltage Protection Devices
Configuration
Medium protection Fine protection
For installation upstream of counters in main distribution boards
or in combined main/sub-distribution boards For installation directly upstream of the terminal equipment
Surge arresters, type 2
5SD7424-0, 5SD7424-1,
5SD7464-0, 5SD7464-1
Surge arresters, type 3
For installation in sub-distribution boards
or control cabinets
5SD7432-x and 5SD7434-1
With remote signaling
Only required if the distance between the main and sub-distribution boards
is > 10 m
Surge arresters, type 2
5SD7463-0, 5SD7463-1
Only required if the distance between the main and sub-distribution boards
is > 10 m
Surge arresters, type 2
5SD7424-0, 5SD7424-1,
5SD7464-0, 5SD7464-1
Surge arresters, type 2
5SD7463-0, 5SD7463-1
Surge arresters, type 2
5SD7424-0, 5SD7424-1,
5SD7464-0, 5SD7464-1
Only required if the distance between the main and sub-distribution boards
is > 10 m
Surge arresters, type 2
5SD7463-0, 5SD7463-1
Only required if the distance between the main and sub-distribution boards
is > 10 m
Surge arresters, type 2
5SD7473-1
3-pole, (3+0 circuit)
U
c
= 580 V AC
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5SD7 surge arresters for measuring and control technology
Overvoltage Protection Devices
■
Overview
The surge arresters for measuring and control technology are
overvoltage protection modules that comprise two parts, a basic
element and a plug-in part. Their application area is the protec-
tion of signal circuits.
The cable shields of basic elements can be either directly or
indirectly grounded.
The mounting width of the new surge arresters is 1 MW.
Through the number of integrated paths, it is possible to protect
up to four signal cores or two double cores against overvoltages.
The arresters are made up of two parts (plug-in part and base
element).
A mechanical encoding ensures protection against reverse
polarity.
■
Technical specifications
KA: Basic element grounded via gas arrester
KB: Basic element directly grounded
5SD7502-0KB 5SD7522-7KA
5SD7522-7KB
5SD7530-4KA
5SD7530-4KB
5SD7540-6KB 5SD7541-7KB 5SD7550-4KA
5SD7550-4KB
IEC category/EN type C1/C2/C3/D1 C1/C2/C3/D1 C1/C2/C3/D1 C1/C2/C3/D1 C1/C2/C3/D1 C1/C2/C3/D1
Maximum continuous voltage U
C
• Direct voltage V DC 68 40 14 27 40 14
• AC voltage V AC 48 28 8.3 18.6 28 9.8
Rated current I
N
mA 2000 450 450 2000 300 450
Lightning test current I
imp
10/350 μsPer path kA 52.5 2.5 2.5 2.5 2.5
Rated discharge surge current I
n
8/20 μs
• Core – Core kA -- 10 10 0.365 -- 10
• Core – Ground kA 20 10 10 0.365 10 10
Total surge current I
N
8/20 μskA 40 20 20 20 20 20
Output voltage limit at 1 kV/μs
• Core – Core V -- ≤ 55 25 25 -- ≤ 25
• Core – Ground V ≤600 ≤ 450 40 40 ≤ 55 ≤ 25
Residual voltage at I
n
• Core – Core V -- ≤ 55 -- -- -- ≤ 25
• Core – Ground V -- -- -- -- ≤ 55 ≤ 40
Response time t
A
• Core – Core ns -- ≤ 1 ≤ 500 ≤ 1 -- ≤ 500
• Core – Ground ns ≤ 100 ≤ 100 ≤ 500 ≤ 100 ≤ 1 ≤ 500
Insertion loss a
E
• Symmetrical in the 50-Ω system dB -- Type 0.5 (1.5
MHz) -- 0.1 dB to 1 MHz -- --
• Asymmetrical in the 50-Ω system dB 0.1 (1 MHz) -- -- -- 0.5 (1.5 MHz) --
• Symmetrical in the 100-Ω system dB -- -- 0.2 (5 MHz) -- -- 0.2 (5 MHz)
Limit frequency f
G
(3 dB)
• Symmetrical in the 50-Ω system MHz -- typ. 8 -- 6 MHz (typ.) -- --
• Asymmetrical in the 50-Ω system MHz -- -- -- -- typ. 8 --
• Symmetrical in the 100-Ω system MHz -- -- typ. 70 -- -- typ. 70
Resistance per path Ω-- 2.2 -- -- 4.7 2.2
Temperature range °C -40 ... +85
Degree of protection according to
IEC 60529/EN 60529
IP20
Flammability class acc. to UL 94 V0
Test standards EN 61643-21/
EN 61643-21 EN 61643-21/
EN 61643-21 IEC_61643-21/
EN 61643-21 IEC_61643-21/
EN 61643-21 EN 61643-21/
EN 61643-21 IEC 61643-21
PH_06.book Seite 26 Freitag, 5. Februar 2016 11:41 11
© Siemens AG 2016
27
Siemens · 10/2015
Overvoltage Protection Devices
5SD7 surge arresters for measuring and control technology
5SD7581-2 5SD7581-3 5SD7581-5 5SD7581-6
IEC category/EN type B2/C1/C2/C3/D1 B2/C1/C2/C3/D1 B2/C1/C2/C3/D1 B2/C1/C2/C3/D1
Maximum continuous voltage U
C
• Direct voltage V DC 185 3.3 12 15
• AC voltage V AC 128 2.3 8.3 10.4
Rated current I
N
mA 380 1500 380 1000
Rated discharge surge current I
n
8/20 μs
• Core – Core kA 50.10 50.25
• Core – Ground kA 5250.25
Total surge current I
N
8/20 μskA 10 10 10 5
Output voltage limit at 1 kV/μs
• Core – Core V ≤ 250 ≤ 9 ≤ 25 ≤ 25
• Core – Ground V ≤ 250 ≤ 700 ≤ 700 ≤ 650
Residual voltage at I
n
• Core – Core V ≤ 120 ≤ 15 ≤ 25 ≤ 55
• Core – Ground V ≤ 120 ≤ 700 ≤ 55 ≤ 700
Respnose time t
A
• Core – Core ns ≤ 100 ≤ 1 ≤ 100 ≤ 1
• Core – Ground ns ≤ 100 ≤ 100 ≤ 100 ≤ 100
Insertion loss a
E
• Symmetrical in the 50-Ω system dB -- -- -- --
• Asymmetrical in the 50-Ω system dB -- -- -- --
• Symmetrical in the 100-Ω system dB -- ≤ 1 0.3 --
Temperature range °C -40 ... +85
Degree of protection according
to IEC 60529/EN 60529
IP20
Test standards EN 61643-21 EN 61643-21 EN 61643-21 EN 61643-21
Plug-in part 5SD7502-0 5SD7522-7 5SD7530-4 5SD7540-6 5SD7550-4 5SD7541-7
Surge arresters 5SD7502-0KB 5SD7522-7KA
5SD7522-7KB 5SD7530-4KA
5SD7530-4KB 5SD7540-6KB 5SD7550-4KA
5SD7550-4KB 5SD75SD7541-7KB
PH_06.book Seite 27 Freitag, 5. Februar 2016 11:41 11
© Siemens AG 2016
28 Siemens · 10/2015
5SD7 surge arresters for measuring and control technology
Overvoltage Protection Devices
■
Dimensional drawings
■
Circuit diagrams
1)
With the 5SD7512-1, 5SD7522-1, 5SD7541-1 and 5SD7500-0 basic
elements, the terminals 9 and 10 (GND) are directly connected to the
standard mounting rail over the metallic mounting foot.
KA: Basic element grounded via gas arrester
KB: Basic element directly grounded
5SD75..
5SD7522-7KA
5SD7522-7KB 5SD7530-4KA
5SD7530-4KBS 5SD7540-6KB
5SD7541-7KB 5SD7502-0KB 5SD7550-4KA
5SD7550-4KB
I201_15520
18
7911
81012
45
71
90
45
297
59
1173
1)
51
28
612
10
9
4
I201_15524a
PE
PE
IN
OUT
1)
PE
PE
IN
OUT
11 97
812 10
3
4
I201_18959
1)
PE
PE
IN
OUT
11 9751
28
61210
3
4
I201_18953
11 9751
2861210
3
4
I201_15526
1)
PE
PE
IN
OUT
53
1
6
24
I201_15521
PE
PE
IN
OUT
11 9751
28
61210
3
4
I201_15522a
1)
PE
PE
IN
OUT
PH_06.book Seite 28 Freitag, 5. Februar 2016 11:41 11
© Siemens AG 2016
© Siemens AG 2016
The information provided in this brochure contains merely general
descriptions or characteristics of performance which in case of actual
use do not always apply as described or which may change as a result
of further development of the products. An obligation to provide the
respective characteristics shall only exist if expressly agreed in the
terms of contract. Availability and technical specifications are subject
to change without notice.
All product designations may be trademarks or product names of
Siemens AG or supplier companies whose use by third parties for their
own purposes could violate the rights of the owners.
Siemens AG
Energy Management
Low Voltage & Products
Postfach 10 09 53
93009 REGENSBURG
GERMANY
Subject to change without prior notice
PDF (3ZW1012-5SD74-0AC1)
PH 0216 28 En
Produced in Germany
© Siemens AG 2016
www.siemens.com/lowvoltage
© Siemens AG 2016