Operating
Instructions
H -- R 263 en 03.09
Explosion--proof three--phase motors
with squirrel cage for high voltage,
with sleeve bearings
Protection type ”Flameproof enclosure”
(acc. to Directive 94/9/EC)
DHT.-400..--.. to DHT.-630..-..
DHQ.-710..--.. to DHQ.-800..-..
LOHER GmbH
P.O. Box 1164 S94095 Ruhstorf
Hans--Loher--Str. 32 S94099 Ruhstorf
Germany
Telephone +49--8531 39--0 SFax +49--8531 32895
e--mail: info@loher.com
http://www.loher.com
H--R 263 en 03.09Page1of33
Table of contents
Page
1. Safety-andcommissioninginstructions......................... 2
2. Protectiontype”Flameproofenclosure”............................. 5
3. Description............................................... 12
4. Transport.................................................. 14
5. Installationandcommissioning................................ 15
6. Maintenance ................................................. 24
7. Additional equipment.......................................... 27
8. Spare parts and components ................................. 27
9. Storageinstructions...................................... 28
10. Faultsandremedies........................................ 31
11. EC-DeclarationofConformity.....................................32
Appendix 1; Alignment check .................................... 33
Subject to modifications
©Loher GmbH 2009
All rights reserved
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Safety- and commissioning instructions
1. Safety-- and commissioning instructions
1.1 Warning symbols in these instructions
The symbols are used in these operating instructions to point out to particular dangers.
This symbol refers to a dangerous situation which can cause fatal or serious injuries or
considerable damage to property.
This symbol refers to a possibly dangerous situation which can cause injuries and damage to
property if it is not avoided.
1.2 General
High voltage motors > 1kV have dangerous, live and rotating parts, and probably hot surfaces.
All work for transport, connection, commissioning and maintenance is to be made by qualified,
responsible specialists (EN 50 110-1 / DIN VDE 0105 / IEC 60364 must be observed). An
inadequate behaviour can cause severe damage to persons and property.
Caution Danger to life!
1.3 Intended use
These high voltage motors are meant for use in industrial plants. They are in accordance with
the harmonized standards of the series EN 60034 (VDE 0530). For their use in hazardous areas
the additional instructions for protection type ”d” have to be observed (pages 5 to 11).
Air--cooled types are suitable for ambient temperatures from -- 2 0 oCto+40oCas well as altitudes
≤1000 m above sea level. The ambient temperatures for water--cooled models must be at least
+5oC (observe the manufacturer documentation for sleeve bearings).
It is imperative to observe differing data on the rating plate. The conditions at the site of application
must comply with all indicated data on the rating plate.
High voltage motors are components to be installed into machines in accordance with the
Machinery Directive 98/37/EC. Commissioning is not allowed as long as the conformity of the
end product with this directive is not established (the relevant national and international safety- and
installation regulations, e.g. EN 60204 have to be observed).
1.4 Transport, storage
The carrier is immediately to be informed on damage found upon delivery; commissioning must
not be admitted, if required. Eye bolts (attachment points) are suitable for the weight of the high
voltage motor, no additional loads are allowed to be attached. If required, sufficiently dimensioned
means of transport (e.g. rope guides) are to be used. Prior to commissioning the transport
locking devices (e.g. antifriction- and sleeve bearing locks, vibration dampers) are to be
removed. Reuse for further transports.
For storage of high voltage motors, take care of a dry, dustfree and low--vibration (v eff ≤0.2
mm/s) ambiance (bearing damage with motor at standstill). Before commissioning the insulation
resistance is to be measured. In case of values ≤4⋅(UN[kV]+1) [MΩ]at20oC winding temperature
the winding must be dried. Observe the ”Storage instructions”.
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Safety- and commissioning instructions
1.5 Installation
Take care of an even ground, suitable fastening of feet or flange and an exact alignment for direct
coupling. Avoid that structure--dependent natural frequencies occur within the rotary frequency
and the double mains frequency. Turn rotor, listen for abnormal frictioning noises.
Check direction of rotation before coupling (observe paragraph ”Electrical connection”).
Couplings or other driving elements are only allowed to be installed or removed with suitable
devices (heating!) and to be covered with protection against accidental contact. Avoid inadmissible
radial and axial bearing loads (observe manufacturer documentation). Balance of the high voltage
motor is indicated on the shaft end face or on the rating plate (H = half key, F = full key). In case
of a half key (H) the coupling must also be balanced with a half key. Remove any protruding and
visible part of the key.
If required, make the necessary pipe connections. Mounting types with the shaft end facing
upwards are to be provided with a cover by the customer. The ventilation must not be hindered
and the outgoing air – also from adjacent units – must not be directly sucked in again.
1.6 Electrical connection
All work is only allowed to be done by qualified personnel with the high voltage motor at
standstill. Prior to start work it is imperative that the following 5 safety rules are applied:
-- Electrically dead
-- Locking against restart
-- Check de--energizing
-- Earthing and short--circuiting
-- Adjacent parts under voltage are to be covered or provided with barriers
Auxiliary circuits (e.g. space heater) must also be electrically dead.
Exceeding the limits of range A indicated in EN 60034-1/ DIN VDE 0530 -1 -- voltage 5%,
frequency 2%, curvature, symmetry -- will result in an excessive heating.
Observe data on the rating plate as well as the wiring diagram in the terminal box.
Connection is to be made in such a way that a durably safe, electrical connection is maintained;
provided cable end equipment is to be used.
A safe potential equalization is to be made and maintained.
The minimum air gaps between uninsulated and live parts themselves and to earth must not be
lower than the following values: 36 mm at UN≤3.2 kV, 60 mm at UN≤6.3 kV,
100 mm at UN≤10 kV. The operating voltage may exceed the voltage level indicated
by 10%.
The terminal box must be free from foreign bodies, dirt as well as humidity.
For trial operation without driving elements the key is to be secured.
For high voltage motors with additional equipment check before initial start--up, whether the
additional equipment is perfectly functioning.
The plant erector is responsible for the adequate installation (e.g. signal lines and power cables,
shielded lines and cables etc. to be spaced apart).
If no other data is indicated, the tightening torques according to paragraph 5.8.2. are applicable
to the terminal screws and nuts.
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Safety- and commissioning instructions
1.7 Operation
Vibration severities according to ISO 10816--1 in the range ”satisfactory” (Veff ≤4.5 mm/s) are not
critical in coupled operation. In case of changes compared with normal operation -- e.g. higher
temperatures, noises, vibrations -- the motor is to be switched off in case of doubt. The cause
is to be found, if required, consult the manufacturer.
Even for trial operation the safety devices are not allowed to be put out of function.
In the case of heavy dirt accumulation, the cooling system must be cleaned at regular intervals.
Observe the oil change intervals for sleeve bearings.
Sound power levels as well as instructions on the use of the appropriate sound reduction measures
are indicated in the manufacturer documentation.
1.8 Maintenance and repair
The operating instructions of the manufacturer have to be observed.
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Instructions for electrical machines in
protection type ”Flameproof enclosure”
2. Protection type ”Flameproof enclosure”
Marking of the motors with EC type examination certificate according to Directive 94/9/EC:
CE 0102 II 2 G Ex de IIB T4 resp. T or CE 0102 II 2 G Ex d IIB T4 resp. T
CE 0102 II 2 G Ex de ib IIB T4 resp. T or CE 0102 II2G ExdibIIBT4resp.T
For explosion--proof motors in protection type ”Flameproof enclosure” according to
EN 60079--0, EN 60079--1, EN 60079--7, and EN 60079--11 the following items have to be
observed:
2.1 General
The increased risk in hazardous areas requires strict observance of the
safety- and commissioning instructions.
2.2 Intended use
Explosion--proof electrical machines are in accordance with the standards EN 60034 as well as
EN 60079. In hazardous areas they are only allowed to be used in accordance with the
specifications of the competent supervising authority, which decides on the explosion hazard and
zone classification.
Additionally to the parameters as for instance power, voltage, current etc., the type of protection,
temperature class as well as special conditions are indicated on the rating plate and in the EC type
examination certificate respectively.
-- Device group II (hazardous areas by gas), Category 2 (= Zone 1)
This category includes electrical machines, e.g. also in protection type ”Flameproof enclosure”,
to be used in areas hazarded by an explosive atmosphere.
Air--cooled types are suitable for ambient temperatures from -20 oCto+40oC as well as altitudes
≤1000 m above sea level. It is imperative to observe differing data on the rating plate. The
conditions at the site of application must comply with all indicated data on the rating plate.
If the certificate number is supplemented by an X, the special conditions of the EC type
examination certificate have to be observed.
Special conditions
Gap dimensions according to the minimum specifications of the EN 60079--1 are not allowed to
be repaired. Please see also paragraph 2.6 Maintenance and repair.
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Instructions for electrical machines in
protection type ”Flameproof enclosure”
2.3 Installation and electrical connection
The installation and operation of electrical equipment in hazardous areas requires the observance
of the applicable national and international rules, e.g.
”Decree on operational safety” (BetrSichV):
”Decree on safety and health care for provision of tools and the use thereof during work, on safety
during operation of plants requiring special monitoring and on the organisation of industrial safety.”
For belt drives only those belts may be used which are allowed for hazardous areas.
The general safety- and commissioning instructions are applicable to the electrical connection.
Cable entries and plugs (for openings which are not used) must be tested for hazardous areas and
approved by an EC type examination certificate according to Directive 94/9/EC.
Position, form and size of the lead--in threads are documented in the motor dimensioned
drawing. In the case of the terminal boxes ”Ex d” type and size of the lead--in threads are
indicated near to the holes.
Special threads are closed with non--certified plugs (only transport protection) upon delivery. These
plugs are to be replaced depending on the type of explosion protection of the terminal box with
certified line entries with EC type examination certificate according to Directive 94/9/EC.
When connecting the motors, the connections inside the terminal box are to be given special
care and attention. Furthermore a safe earthing connection has to be made (see paragraph 1.6
and 2.8.5).
When the leads are inserted into the terminal box, care must be taken that the leads are
strain--relieved.
The inside of the terminal boxes must always be kept clean. The seals must be intact and fit
correctly. In operation the terminal box must always be tightly closed.
High--voltage terminal boxes in protection type ”Increased safety” have a pressure--relief
valve with rupture joint (in the bottom part of the terminal box). Valve and sealing must not be
damaged during assembly and connection. The type of protection must be guaranteed. In case
of damage the sealing has to be renewed only with original sealing material.
Terminal box in protection type ”e” with unbored entry plate
The plate thickness is selected so that a sufficient number of thread turns is achieved when
tapping.
The customer is responsible that the entry plate still has sufficient strength after making the
threads.
Avoidance of contact corrosion
If the aluminium conductors of the motor are connected to Cu-- or Ms--terminals by the
customer special attention must be paid to a low electrolytic potential difference, e.g. special
cable lugs should be used.
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Instructions for electrical machines in
protection type ”Flameproof enclosure”
2.4 Notes on ”intrinsically safe circuits”
For the installation of intrinsically safey circuits a potential equalization is to be applied along the
entire ”intrinsically safe circuit“.
Electrical data:
not intrinsically safe circuit Um= 700 V alternating voltage
intrinsically safe circuit in protection type ”Intrinsic safety“
Ex ib IIB/IIC, only for connection to certified
intrinsically safe and electrically isolated
circuits.
Maximum values of the sum:
IIB⇒IIC⇒
e.g. at T4: Ui=28[V]Ui=24[V]
Ii= 300 [mA]Ii= 170 [mA]
Pi=1.3 [W]Pi=1.3 [W]
The effective internal inductivity and capacity are neglibly low.
Up to a peak value of the rated voltage of 1000[V]the intrinsically safe circuits are isolated from
all circuits which are not intrinsically safe.
There is also an additional plate at the motor onto which the maximum values for ”intrinsically safe
circuits” are stamped.
2.5 Protective measures against overheating
The motors must only be used for the duty type stated on the rating
plate.
Zone A in EN 60034-1 (VDE 0530, Part 1) – voltage 5%, frequency 2%, curvature, mains
symmetry – has to be observed, in order to keep the heating within the admissible limits. Higher
deviations from the rated values can cause an inadmissible heating of the electrical machine and
have to be stated on the rating plate.
In particular, each motor must be protected against overheating due to overload. The following
notes must be observed:
According to EN 60 079--14 all machines must be protected against overheating by a current
dependent delayed circuit breaker with phase failure protection in accordance with EN 60 947 or
by an equivalent equipment in all phases. The protective device must be adjusted to the rated
current (value is indicated on the rating plate).
Furthermore, they must be selected in such a way that the motor is thermally protected even in
case of a blocked rotor.
Windings with delta-connection must be protected in such a way that the circuit breakers or relays
are connected in series with the winding phases. For the selection and adjustment of the circuit
breakers, the rated value of the phase current, i.e. 0.58-times the rated current of the motor must
be taken as basis.
For pole--changing motors, independent and interlocking protective devices are required for each
speed step. Recommended are devices which are tested and certified by a registered inspection
body.
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Measures for maintaining the
explosion protection during operation
2.6 Maintenance and repair
For maintenance, repair and modifications on explosion--proof machines the relevant national
rules ”Decree for electrical apparatus in hazardous areas” (”Betriebssicherheitsverordnung”), the
safety instructions and descriptions of the general maintenance instructions have to be observed.
Any work directly influencing the explosion protection, like for instance
-- repair work on stator- or rotor winding and on the terminals
-- repair work on the ventilation system,
-- repair work on the sleeve bearings,
-- disassembly of flameproof machines,
has to be made at the manufacturer or by a workshop for electrical machines which has been
approved by the manufacturer. The following works are to be identified by an additional repair plate
showing the following data:
-- date
-- company performing the work
-- kind of repair work
-- reference number of the person performing the work concerning the repair.
Check and repair are to be carried out in accordance with the respective EC Directives.
The machine identification was supplemented by the character ”X” (according to EN 60079--0,
paragraph 29.2.i) to draw the attention of the user to the special conditions on repair. The gap
dimensions of the electrical machine do not correspond with the specifications of the EN 60079--1.
If ignition gap geometries are to be repaired or restored, the manufacturer is to be asked for the
gap dimensions of the corresponding machine.
Gap dimensions according to the minimum specifications of the EN 60079--1 are not allowed to
be repaired.
2.7 Spare parts
With the exception of standard, commercial and equivalent parts (e.g. screws) only original spare
parts are allowed to be used (see spare parts list); in particular this also applies to
gaskets.
Components like e.g. terminals, cable-- and lead entries are only allowed to be replaced with
components with an EC type examination certificate.
2.8 Measures to maintain the explosion protection during operation
2.8.1 For explosion--proof motors in protection type ”Flameproof enclosure” according to EN
60079--0 and EN 60079--1, the following points have to be observed:
2.8.2 The machined contact areas and fitting surfaces on the stator housing, end shields, bearing
caps, on the motor shaft, on the bushing plate of the terminal box and, if there are any, the bushing
plates of additional terminal boxes, must not be additionally machined or painted afterwards. The
surfaces are to be kept clean and protected against corrosion with a thin grease layer. There must
not be any sealings between those surfaces which are important for the flameproofness.
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Measures for maintaining the
explosion protection during operation
2.8.3 All screws used to fix the end shields, the bearing caps, the bushing plates and the terminal
boxes must be available and securely tightened. Damaged screws are to be replaced immediately
with screws of the same type and perfect quality.
According to the ambient temperature only screws of the screw quality indicated in the
table are allowed to be used for motors without space heating.
Screw quality for ambient temperature TU
Type/size ≧-- 2 0 oC-- 4 0 oC≦TU<-- 2 0 oC
Standard Stainless screws Standard Stainless screws
400.H, 400.K, 400.L
400.M, 400.N, 400.X 8.8 A4--80 8.8 A4--80
450.K, 450.L, 450.M, 450.N, 450.X
500.K, 500.L, 500.M, 500.N, 500.X
560.K, 560.L, 560.M, 560.N, 560.X
8.8 A4--70 8.8 A4--80
630.H, 630.K, 630.L
630.M, 630.N, 630.X 8.8 A4--80 8.8 A4--80
710.A, 710.B, 710.C, 710.X 8.8 A4--70 8.8 A4--80
800.A, 800.B, 800.C, 800.D 8.8 A4--80 8.8 A4--80
2.8.4 If there are damages on the bushing plates, connection or entry parts, the damaged parts are to
be replaced immediately with original spare parts of perfect quality.
2.8.5 When the motor is being connected, the connections inside the terminal boxes are to be given
special care and attention. The fittings for the mains supply which are screwed on the bushing bolts
for the stator winding connection are to be clamped in such a way that they are locked against
rotation on the bolts. The clamping screws of the connecting parts are to be securely tightened
without force being applied. They must be secured against automatic loosening.
Leakage paths and air gaps must be observed according to EN 60079--0/60079--7.
Connection see paragraph 5.2.
High--voltage terminal boxes in protection type ”Increased safety” are equipped with
a pressure--relief valve with rupture joint (in the bottom part of the terminal box). Valve and sealing
must not be damaged during assembly and connection. The type of protection must be
guaranteed.
In the case of damage the sealing has to be renewed only with original sealing material.
2.8.6 After inserting the cable in the terminal box the glands and the parts used for the strain relief
are to be tightened with the corresponding torque in accordance with the data of the cable gland
manufacturer (see also paragraph 5.8.5).
H--R 263 en 03.09 Page 10 of 33
Measures for maintaining the
explosion protection during operation
2.8.7 All unused cable entries have to be sealed (see paragraph 2.3). The inside of the terminal boxes,
particularly the surface of the insulation parts, is to be kept clean. The seals must be intact and
fit correctly. If there are machined contact areas and fitting surfaces on the terminal boxes and the
terminal box covers, they are also to be kept clean and protected against corrosion by a thin grease
layer.
The terminal boxes must always be tightly closed during operation.
For terminal boxes in protection type ”Flameproof enclosure”, paragraph 2.8.10 is to be observed.
Cable- and lead entries and connecting cables must be suitable for the existing ambient
temperatures.
2.8.8 If there are any O--sealing rings, attention is to be paid that the sealing rings (O--rings) which
are arranged between the individual parts are of a perfect quality and have a proper fit in the slots
provided.
2.8.9 The motors are designed for ambient temperatures of -- 2 0 oCto+40oC or for the temperature
range indicated on the rating plate.
In case of a custom design with integrated heating or heating via winding the motor may
be operated up to the minus temperature indicated on the rating plate. Please see the supplement
to the operating instructions N--R 455 ”Heating to reach the surface temperature required”.
The heating must be switched off before the motor is switched on. The heating may only be
operated when the motor is switched off and is to be locked against the main circuit.
During motor operation the heating must not be switched on.
The heating data for voltage and current is indicated on the additional plate attached to the motor.
Motors of a mechanical special design ”for low temperatures” can be put into operation
without heating up to the minus temperature indicated on the rating plate.
2.8.10 For terminal boxes in protection type d II, flameproof entries must be used, which are tested
and certified for this protection type (see paragraph 2.3).
2.8.10.1 The motors are to be connected via suitable cable-- and lead entries or to piping systems which
meet the requirements of EN 60079--1 and for which a separate examination certificate is
available.
2.8.10.2 Unused openings are to be sealed according to EN 60079--1.
2.8.10.3 Cable-- and lead entries (screw connections) as well as sealing plugs of simple types are not
allowedtobeused.
2.8.11 The maintenance instructions for sleeve bearings specified by the motor manufacturer,
especially for lubrication of the bearings, have to be observed.
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Measures for maintaining the
explosion protection during operation
2.8.12 Mechanical explosion protection
All machines which are marked according to Directive 94/9/EC are to be checked regularly for
mechanical damage that could represent an ignition risk according to EN 60079--17.
The oil change intervals defined are to be observed.
-- The mechanical operativeness of sleeve bearings is to be proved in the course of an inspection.
-- The calculated nominal service life of the bearings is indicated on the machine data sheet if it
was especially prescribed or defined for design reasons for a single case.
-- If bearings are supplied by an exterior oil supply source the user is to monitor the maintenance
of lubrication.
-- The machine must be switched off if the admissible temperature is exceeded, but at 100 °Cat
the latest.
The insulation of the bearings -- if installed -- must always correspond to DIN 31692--4 and must
never be bypassed (e.g. by a thermometer) or reduced.
The lubricant level must regularly be checked via the oil--level gauge or by a level control in the
case of bearings with automatic lubrication or by a flow control to be provided by the operator
in the case of bearings with external lubrication. The machine is to be switched off immediately
if the admissible limit values are exceeded or fallen below.
The oil of bearings with recirculating lubrication should be continuously filtered. The mesh size
of the oil filter should not exceed 20 mm.
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Description
3. Description
3.1 Overall construction and design
Mounting arrangement according to EN 60034--7: see dimensioned drawing or rating plate
Horizontal arrangement IM B3
Connection designations according to
DIN VDE 530 Part 8
IEC 60034 -- 8: see wiring diagram
Enclosure according to
EN 60034 -- 5: see rating plate
Cooling according to EN 60034--6
IC 411 Surface cooling or hollow fin cooling
IC 511 Tube cooling
Details of the motor design are indicated in the valid technical catalogues.
3.2 Bearings
The motors are equipped with sleeve bearings. The bearings are provided with oil--ring lubrication
(with natural cooling) or with oil circulating lubrication (external oil cooling) or water cooling. The
rotor has axial clearance. The axial clearance is indicated in the dimensioned drawing and marked
on the motor. The additional operating instructions ”Axial clearance indicator” must be observed.
It is not permissible that axial forces from the coupling and working machine respectively are
transmitted to the motor bearings. (Special bearings for taking up axial forces only on special
order).
3.3 Cooling
3.3.1 Surface cooling
Design for fin- and hollow fin- or tube cooling, where an external fan takes in the cooling air through
the openings in the fan cover and presses the air over the surface or through the cooling tubes of
the stator housing. With hollow fin- or tube cooling the heat dissipation is supported by a closed
cooling air circuit inside the motor.
3.4 Motor frame
Construction for surface cooling (TEFC):
The stator frame and end shields are of steel. The fan cover is made of sheet steel. The stator
frame surface is provided with cooling fins, hollow fins or tubes and mounted--on terminal box.
3.5 Stator winding
The stator winding is executed in insulation class (see rating plate) according to EN 60034-1.
High--quality enamelled wires, suitable surface insulating materials and the type of insulation
provide a high level of mechanical and electrical stability with a high utilization factor and a long
service life.
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Description
3.6 Rotor
The rotor is equipped with a squirrel cage in brazed version. The rotor is dynamically balanced.
Balance is indicated on the shaft end face or the rating plate,
see paragraph 5.1 ”Installation”.
The motors in standard design meet the requirements of vibration level A according to
EN 60034--14/DIN VDE 0530--14/IEC 60034--14, in special cases level B.
3.7 Terminal boxes
If required, additional terminal boxes for the monitoring devices are available further to the motor
terminal boxes.
On special order a star--point terminal box will be installed (see dimensioned drawing).
The number of available terminals is indicated in the wiring diagrams.
3.8 Monitoring devices
Monitoring devices are only available on special request.
See wiring diagram!
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Transport
4. Transport
For handling during transport the stator construction of the motor is equipped with lifting eyes,
where the lifting hooks can be fixed.
Check whether screwed lifting eyes are securely tightened.
Lift motors only by using these lifting eyes. Several lifting eyes must always be used
together.
Lifting of the motors on other parts (e.g. shaft ends, fan cover) is not permitted, since this may lead
to considerable damage.
The lifting eyes are only suitable for the motor weight. Additional loads attached to the
motor must never be lifted using these lifting eyes.
The minimum or maximum permissible ambient temperature must not be fallen below or
exceeded during transport.
The permissible ambient temperatures are indicated on the rating plate.
Differing ambient temperatures for transport are especially to be agreed upon and are specified
in the technical documents.
4.1 Check before installation
Check whether the motor has been damaged during transport. If the packing is damaged to
such an extent that a motor damage is to be assumed, the packing should be removed in the
presence of a representative agent of the carrier.
4.2 Bearing lock
The rotor of the motor is fixed axially by a transport locking mechanism which is attached to the
shaft end or to the coupling and is supported by the bearing box. The transport locking mechanism
must be removed before commissioning. After this, it must be possible to turn the shaft without
difficulties.
The transport locking mechanism has to be reused for further transports.
Prevent failures and thus avoid damage to persons and property.
The person responsible for the system has to make sure, that
-- safety-- and operating instructions are available and observed
-- operating conditions and technical data according to the order are observed
-- protective equipment is used and
-- specified maintenance work is carried out.
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Installation and commissioning
5. Installation and commissioning
Maximum permissible coolant temperature (ambient temperature on site) acc. to EN 60034-1/
IEC 60034-1 is max. 40 oC (104oF) and a permissible altitude up to 1000 m above sea level
(other values see rating plate).
Care must be taken that the cooling air can flow without hindrance into the air inlet openings
and freely pass through the air outlet openings and cannot be directly sucked in again. Suction-
and outlet openings must be protected from obstructions and coarse dust.
A most careful mounting and alignment of the motors on an absolutely even surface is
imperative to avoid distortions when the screws are being tightened. For machines which are to
be coupled attention must be paid to a careful alignment. See Appendix 1 for alignment check.
As elastic as possible couplings should be used.
5.1 Assembly
Stable foundations or mounting and installation conditions, precise alignment of the motors and
a properly balanced driven assembly are prerequisites for a smooth and low--vibration running.
Check the foundation surface for evenness and check whether it is free from contamination
before starting mounting work. In order to avoid distortion of the motor feet the total evenness
of the mounting surfaces must not exceed the following values
Size Total evenness of the mounting
surfaces
≤080 0.1 mm
090--355 0.2 mm
≥400 0.3 mm
If spacers are required for height adjustment and in order to avoid distortions of the motors,
these must be made of even rolled material of sufficient size.
Balancing of the rotor with the driven assembly may be necessary.
Fitting of pulleys or couplings.
First the shaft end should be cleaned (not with emery cloth) and then greased. Pulley or
coupling may only be fitted with the aid of a fitting device. For this purpose the threaded
centering hole in the shaft end can be used. Insert a threaded bolt into the threaded hole. Then
place the steel washer, the diameter of which is large enough to cover the hub borehole of the
pulley or coupling. The pulley and coupling is to be pulled up onto the shaft end by means of a
nut or a suitable hydraulic device.
The fitting of the drive elements by means of hammer blows is not permitted because of
the risk of bearing damage.
When replacing the bearing shells only original spare parts may be used.
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H--R 263 en 03.09 Page 16 of 33
Installation and commissioning
The rotor of the motor is dynamically balanced. Balance is indicated on the shaft end face or
theratingplate(H= half key, F= full key). Take care of the balance for installation of the
driving element!
The balancing of the transmission elements to be fitted must be adapted to the rotor balancing.
In case of half key balancing any protruding and visible part on the key has to be removed.
The motor must only be mounted and operated according to the specified mounting
arrangement (see rating plate).
If e.g. pulleys, gears etc. are used care must be taken that the permissible radial and axial
shaft loads are not exceeded.
For explosion--proof motors only belts which are permissible for hazardous areas are allowed
to be used.
5.2 Connection, insulation resistance
Connection must only be made by an expert and in accordance with the valid standards and
safety regulations. The relevant national and international safety-- and installation regulations
have to be considered.
Observe data on the rating plate!
Compare type of current, mains voltage and frequency (see also paragraph 5.3.1).
Observe connection!
Observe rated current for setting of the protective switch!
Connect motor in accordance with the wiring diagram provided in the terminal box!
The motor must be protected against inadmissible overheating.
See paragraph 2.5.
For terminal boxes with clamp strap the individual conductors must be distributed in such a
way that the clamp heights on both connector sides are more or less the same. This
connection type requires that one single conductor is shaped in a U--form and connected with a
cable lug.
This also applies to the internal and external earthing conductor connection.
When connecting with cable lugs it must be ensured that the cable lug size corresponds to the
required conductor cross section and the bolt size. An inclined arrangement is only permissible
if the air-- and leakage paths required are maintained.
Strip the conductor ends to that the remaining insulation comes nearly up to the cable lug.
H--R 263 en 03.09Page 17 of 33
Installation and commissioning
Bolt with collar
Mains connection with cable lug
between washer DIN 125 and DIN
137
Bushing bolt with cable lug connection
Bushing bolt with clamping head
H--R 263 en 03.09 Page 18 of 33
Installation and commissioning
For earthing the motor is provided with an earthing terminal, which depending on the mounting
arrangement is either located on the frame resp. on the flange end shield. In addition all motors
have a protective conductor terminal inside the terminal box.
As protection against dust and humidity unused cable entries in the terminal box (see also
paragraph 2.3) must have a torsion--proof seal. All terminal screws and nuts have to be
securely tightened to avoid excessive transition resistances (see paragraph 5.8).
Protective measures are to be taken.
In operation the terminal box must always be tightly closed.
On terminal boxes which have ground surfaces between cover and base, a thin grease film is
to be applied for sealing and against corrosion.
High--voltage terminal boxes of the protection type ”e” have a pressure--relief valve with rupture
joint (in the bottom part of the terminal box). Valve and sealing must not be damaged during
assembly and connection. The type of protection must be guaranteed.
In the case of damage the sealing has to be renewed only with original sealing material.
Terminal boxes with current transformer
If current transformers are used make sure that the secondary circuit of the current transformers
is protected against inadvertent opening during operation.
After longer storage periods or standstill (see 9.1.2) the insulation resistance of the winding must
be measured phase against phase and phase against ground before putting into operation.
Damp windings can cause leakage currents, arcing and ruptures.
The insulation resistance of the windings must reach the following values
-- stator winding ≧4⋅(U
stator [kV] + 1) [ΜΩ],
measured at a winding temperature of 20 oC.
Possibly existing overvoltage suppressors which are connected to the motor can invalidate the
insulation resistance. In case of doubt disconnect the overvoltage suppressors.
In case of lower insulation resistance the windings have to be dried (also see paragraph 9.1.2).
H--R 263 en 03.09Page 19 of 33
Installation and commissioning
5.3 Direction of rotation and designation of the terminals according to DIN VDE
0530-8/IEC 60034-8
5.3.1 Motors suitable for one direction of rotation only are identified by an arrow on the motor for
the correct direction. Terminals U1, V1, W1 connected to phase L1, L2, L3 (in alphabetical
sequence or natural sequence) always result in clockwise rotation.
This rule applies to all motors, even if they are not suitable for clockwise direction.
5.3.2 Change of rotational direction:
The direction of rotation can be reversed by exchanging two mains conductors on the motor
terminal board.
For a machine with one shaft end only or with two shaft ends of different diameters, that direction
of rotation of the rotor is considered as the direction of rotation, being noticed by anybody when
looking at the front end or thicker shaft end.
5.3.3 With forced ventilation the direction of rotation is separately marked by an arrow on the forced
ventilation itself.
5.4 Oil supply
The diameter of the piping must be rated in such a way that for the supply line the flow rate does
not exceed 1.5 m/s approx., for the return line the flow rate should not exceed 0.15 m/s.
If a gradient of 15_in the return line cannot be realized because of constructional reasons,
correspondingly large diameters must be installed in order to avoid an oil back draught which could
cause overflowing of the bearing.
Welded and hot--bent, rusty or internally strongly dirty piping must be pickled before installation.
After installation of the piping the whole oil circuit must be flushed in order to avoid bearing damage
by contamination. Use kerosene or flushing oil. For this purpose all measuring fittings (pressure
switch etc.) have to be removed and their connections must be closed. After flushing, the filters
must be cleaned.
The bearings must never be kept in the flushing circuit.
Filling the bearing lubricating oil by collecting units, for example in connection with gears, a
corresponding filter must be provided in the pressure pipe to the motor. Further, in front of every
bearing a suitable pressure reducing valve must be provided, by the air of which the oil pressure
can be adjusted from 0.2 to 0.8 bar (at operating temperature). We recommend to install electronic
flow indicators into the discharge lines behind the bearings to be able to control the oil circuit. Flow
sight glasses are provided by standard!
H--R 263 en 03.09 Page 20 of 33
Installation and commissioning
5.5 Sleeve bearings
In order to avoid leaking during transport, the bearings of the motors are delivered without bearing
oil. Prior to commissioning the bearings must be filled with oil up to the oil level mark and to the
oil return respectively.
The viscosity class according to DIN 51519 of the bearing lubricating oil and the oil quality
respectively are indicated on the instruction plate at the motor.
In general, every branded mineral oil with low foaming property and good ageing stability can be
used as lubricant. If a lubricating oil with a viscosity deviating from the specified is to be used, this
is to be confirmed by the motor manufacturer.
For the use of synthetic oils attention is to be paid that only PAO (Poly--Alpha--Olefine) oils are
allowed to be used! For all other synthetic oils it is necessary to consult the motor manufacturer!
If the motor is operated at low ambient temperatures special measures are required, e.g.
synthetic oils or oil--circulating lubrication or a bearing heater with level switch are to be used.
The bearing heater and the level switch are to be connected as indicated in the wiring diagram.
The bearing heater must never be switched on during motor operation.
An operation of the bearing heater is only allowed when the motor is switched off.
The lower permissible ambient temperature is indicated on the rating plate.
In order to ensure a sufficient oil flow in the oil supply lines for sleeve bearings with
circulating--oil lubrication, the oil inlet temperature should not be lower than + 10 _C!
5.6 Sleeve bearings for oil--ring lubrication with water cooling
See dimensioned drawing or instruction plate at the motor!
Take care that the motor is only switched on when the cooling water circuit is operating. It must
be maintained until the motor comes to a rest after having been switched off.
Cooling water supply for sleeve bearings
In order to achieve an effective cooling for the bearings the cooling water inlet temperature should
be as low as possible!
The water speed should not exceed 1.5 m/s to avoid damage by cavitation, especially occuring
in the pipe elbows. Adequate regulating devices are to be made available by the customer.
Unpressurized discharge of the water is required. It must be possible to drain off the cooling water
circuit.
To control the cooling water circuit it is recommended to install electronic flow indicators behind
the bearings in the discharge lines.
Cooling water requirement, max. cooling water inlet temperature, max. cooling water pressure etc.
are indicated on the instruction plates at the motor.
H--R 263 en 03.09Page 21 of 33
Installation and commissioning
5.7 Check before commissioning
-- Observe data on the rating plate!
-- Check whether voltage and frequency of the motor comply with the mains data!
-- Check whether the bearing lock has been removed!
See paragraph 4.2 ”Bearing lock”!
-- Check whether the bearing is filled with oil orderly!
-- Check whether the oil--ring is seated on the shaft in the correct position!
Check whether the oil circuit on the bearings for circulating oil lubrication is in operation!
-- Check whether the rotor is located in the magnetic center!
-- Check at starting whether the oil ring is running freely and provides a perfect oil supply
for the sleeve bearing.
-- Check on the bearings for water cooling, whether the cooling water circuit is in operation!
-- Check whether the direction of rotation is correct!
-- Check whether the motor is protected as specified in the regulations!
-- Check whether the electrical connections are securely tightened and whether the
monitoring devices are correctly connected and adjusted!
-- Visual check, whether the pressure--relief valve and the sealing in the high--voltage terminal
box of protection type ”e” are undamaged.
-- Check whether protective measures have been taken: earthing!
-- Check coolant temperature!
-- Check whether additional equipment - if existing - is functioning.
-- Check whether the cooling air inlet openings and cooling surfaces are clean!
-- Check insulation resistance of the stator winding!
-- Check whether the motor is securely fixed!
-- In case of a belt drive, check the belt tension!
-- Check whether the cover of the terminal box is closed and whether the cable
entries are properly sealed.
-- Check whether the screwed cable glands and the plugs (for lead--in threads that are
not required) are approved with an EC type examination certificate according to
directive 94/9/EC.
-- For motors with forced ventilation it is to be checked, whether the forced ventilation
is functioning and in operation when the main motor is switched on.
H--R 263 en 03.09 Page 22 of 33
Installation and commissioning
5.8 Tightening torques for screwed joints
5.8.1 General
If no other data is indicated the following torque limits (screw and nut) are applicable.
Note: Screws which become unusable have to be replaced with new ones
of the same strength class and type.
5.8.2 Screwed joints for electrical connections
Thread Tightening torque [Nm] Thread Tightening torque [Nm]
M4 1,2 M12 15,5
M5 2M16 30
M6 3M20 52
M8 6M24 80
M10 10 M30 150
5.8.3 Screwed joints strength class 8.8 and A4-70
Tightening torques for screws of the strength class 8.8 and A4-70 (A4-80) only in components
with higher strength (e.g. grey cast iron, steel).
Thread Tightening torque [Nm] Thread Tightening torque [Nm]
M4 2,3 M14 105
M5 4,6 M16 160
M6 7,9 M20 330
M8 19 M24 560
M10 38 M30 1100 1)
M12 66 M36 1900 1)
1) Values are not applicable to strength class A4--70 and A4--80
5.8.4 Screwed joints strength class 5.6
Tightening torques for screws of the strength class 5.6, 4.6, A2 or for screws in components
with lower strength (e.g. aluminium).
Thread Tightening torque [Nm] Thread Tightening torque [Nm]
M4 1,1 M14 49
M5 2,1 M16 75
M6 3,7 M20 150
M8 8,9 M24 260
M10 18 M30 520
M12 30 M36 920
H--R 263 en 03.09Page 23 of 33
Installation and commissioning
5.8.5 After inserting the cable in the terminal box the glands and the parts used for the strain relief
are to be tightened with the corresponding torque in accordance with the data of the cable gland
manufacturer.
The assembly torque limits depend on the used cable gland as well as the cable or supply line
and must therefore be determined by the user.
The Loher standard glands supplied with the motor have at least to be tightened according to
the table.
Table: Assembly torque limits for Loher standard cable glands [Nm]
Cable gland for EExeII/ExeII
Type HSK--M
Cable gland for EEx d II / Ex d II
Type ADL 1F, ADL 4F
Nominal size Union nut Connection thread Union nut Connection thread
M12x1.5 5 7 -- --
M16x1.5 5 7 -- --
M20x1.5 5 7 15 20
M25x1.5 710 18 24
M32x1.5 710 20 27
M40x1.5 710 40 54
M50x1.5 710 80 107
M63x1.5 710 90 120
M75x1.5 -- -- 110 147
H--R 263 en 03.09 Page 24 of 33
Maintenance
6. Maintenance
The person responsible for the system has to make sure, that the specified
maintenance work is carried out adequately.
6.1 Bearings, lubrication and cooling of the bearings
The bearings of these motors are constructed in two parts. The bearing shells allow self--adjusting
under load.
The bearing surfaces are subjected to a precise machining. Rescraping of the surfaces should
therefore be strictly avoided. The oil rings are essential for the bearings and require a careful
treatment. They must be protected against damage and deformation.
6.1.1 Sleeve bearings with oil--ring lubrication (natural cooling)
The big ribbed housing surface of the bearings guarantees good cooling.
It is recommended to keep the outside of the bearing housings clean in order not to hinder the heat
radiation by dust or dirt deposits.
Lubrication is done automatically by oil--ring lubrication. The oil rings are essential for the bearing.
Prior to commissioning the bearings must be filled with oil up to the oil level mark.
Commissioning
After starting the bearings are to be checked permanently during the first hours, which means
a) Bearing temperature
The bearing temperature should rise constantly up to the steady--state temperature. If the
steady--state point does not occur below 90_C, the equipment must be stopped and the
reasons must be found out.
If operating temperatures were indicated for the bearings, the reasons have to be
found as well in case of downward deviations (cold bearings). The thermometers
may be defective.
b) Oil tightness
The bearings must not loose oil, neither on the lateral bore holes nor on the parting line or on
the oil levels, screw plugs etc. Check whether unused connection holes are plugged. In case
of oil--ring lubricated bearings an oil loss can easily cause the destruction of the bearing
surfaces.
c) Running smoothness
The running smoothness of an equipment depends on many influencing factors. If uneven
running occurs during the commissioning, the equipment must be stopped at once and the
cause must be eliminated.
Check after commissioning
-- Check whether the motor is running smoothly.
-- Check whether the oil ring is seated on the shaft and runs freely.
Oil change periods
The first oil change should be made after 600 – 700 operating hours. The oil change intervals are
stamped on the instruction plate at the motor.
H--R 263 en 03.09Page 25 of 33
Maintenance
6.1.2 Sleeve bearings for circulating--oil lubrication (external oil cooling)
Cooling of the bearings is ensured by the circulating--oil lubrication.
The oil circuit of the system must be monitored.
The big ribbed housing surface of the bearings guarantees an additional cooling.
It is recommended to keep the outside of the bearing housings clean in order not to hinder the heat
radiation by dust or dirt deposits.
Lubrication is done automatically by oil--ring lubrication. The oil rings are essential for the bearing.
Commissioning, bearing temperature, oil tightness, running smoothness and check after
commissioning refer to paragraph 6.1.1.
6.1.3 Sleeve bearings with oil--ring lubrication and water cooling
Cooling of the bearings is ensured by the water cooling.
The water circuit of the system must be monitored.
The big ribbed housing surface of the bearings guarantees an additional cooling.
It is recommended to keep the outside of the bearing housings clean in order not to hinder the heat
radiation by dust or dirt deposits.
Lubrication is done automatically by oil--ring lubrication. The oil rings are essential for the bearing.
Prior to commissioning the bearings must be filled with oil up to the oil level mark.
Commissioning, bearing temperature, oil tightness, running smoothness and check after
commissioning refer to paragraph 6.1.1
6.2 Bridging the bearing insulation
If both bearings are insulated, the bearing insulation at the driving end must be neutralized by
connecting a bridging cable during operation in order to avoid a dangerous voltage potential
build--up in the rotor.
An instruction plate with the following text is attached to the motor:
”Caution, both bearings insulated.
The bearing insulation AS must be bridged during operation.”
6.3 Checking the bearing insulation
The bridging of the bearing insulation may only be removed by disconnecting the bridging
cables when the machine is at a standstill. Now the bearing insulation can be checked.
Reconnect the bridging cable when the insulation test is finished.
H--R 263 en 03.09 Page 26 of 33
Maintenance
6.4 Ventilation filters
The sleeve bearing at the non--driving end and the sleeve bearing at the driving end (in the
case of air exit dampers) have screwed--on ventilation filters.
The ventilation filters must be checked visually.
The visual check can be carried out when the machine is running.
Danger of accident! Pay attention to rotating parts.
No dirt or dust may penetrate in the air pipe of the sleeve bearing.
The lubricating oil must not be contaminated!
Cover the air pipe during the visual check. Don’t forget to attach the ventilation filter again.
6.5 Maintenance of the ventilation filters
The ventilation filters should be checked once a year in the case of normal applications and
every 6 months in the case of applications where dust or sand is present.
In the case of heavy contamination the ventilation filter is to be replaced with an original spare
part.
6.6 Terminal locations, terminals and ventilating passages
Depending on the operating conditions, the following should be done at certain intervals
-- check the cleanliness of terminal locations and terminals
-- check the electrical connections with regard to tight fit
(tightening torques see paragraph 5.8)
-- clean the air--flow channels.
Both the cooling air inlets and the cooling surfaces must be protected against obstruction and
contamination.
Never use sharp--edged tools for cleaning.
H--R 263 en 03.09Page 27 of 33
Additional equipment
Spare parts
7. Additional equipment
On special order only.
7.1 Temperature monitoring *)
The temperature sensors for monitoring e.g. of the stator winding temperature, the bearings,
the coolant must be connected by one or several additional terminal boxes.
The temperature sensors have to be connected according to the relevant wiring diagram.
For connection the specifications and instructions acc. to paragraph 5.2 ”Connection” are
applicable.
7.2 Space heater*) (for protection against condensation water)
Heating capacity and connection voltage: see instruction plate at the motor. The space heater is
to be connected according to the wiring diagram provided in the terminal box.
For connection the specifications and instructions acc. to paragraph 5.2 ”Connection” are
applicable.
The heating may only be operated when the motor is switched off and is to be locked against the
main circuit.
7.3 Forced ventilation *)
Observe direction of rotation! (see arrow for direction of rotation)
Forced ventilation is to be connected according to the wiring diagram inside the terminal box.
During operation of the main motor the forced ventilation must be switched on! The forced
ventilation is dissipating the heat loss during operation of the main motor. The temperature of
the main motor must be monitored electrically.
If forced ventilation is regulated by temperature sensors in the main motor winding, a
temperature--dependent follow--up run must be possible after the main motor was switched off.
7.3.1 To be checked when commissioning the main motor:
Check whether the forced ventilation is functioning and in operation when the main motor is
switched on!
*) On special order only.
8. Spare parts and components
When ordering spare parts, please state:
Spare part designation
Generator type
Serial number
Example: End shield AS
DHQL--710LC--18A
5 133 755
Type and serial number of the motor can be taken from the rating plate.
H--R 263 en 03.09 Page 28 of 33
Storage instructions
9. Storage instructions
9.1 For motors which have to be stored for a period of up to 2 years, the
following is to be observed:
9.1.1 Storage
9.1.1.1 The motors are to be stored dry, dust--free and at room temperature.
In this case no special packing is required. Otherwise the motors must be packed into plastic
foil with humidity--absorbing substances (e.g. Branogel) or into an air--sealed foil. Protective
cover against sun and rain is to be provided.
9.1.1.2 In order to avoid consequential damage at the bearings caused by vibrations at standstill, for
example by adjacent running machines, the motors are only allowed to be stored in
vibrationless rooms.
9.1.1.3 For transport the motors with sleeve bearings have to be equipped with a bearing lock at the
driving end. This is to remain locked until commissioning resp. to be re--installed after an
inspection or a trial operation.
9.1.1.4 The motors are delivered and stored without oil filling in the bearings. In order to protect the sleeve
bearings incl. the motor shaft against corrosion until commissioning the following measures have
to be taken:
All openings have to be sealed,
the threaded holes have to be fitted with plugs,
the connection flanges have to be fitted with blank flanges,
the gap between gasket and shaft or gasket and housing has to be covered (self--adhesive,
durable tape).
Remove the glass cover on the bearing housing; with a pneumatic spraying gun spray in an
anti--corrosive through this opening. This medium (e.g. Valvoline Tectyl 511 M) does not have to
be removed for commissioning of the motor.
Put a bag with humidity--absorbing filling (e.g. Branogel) below the glass cover to avoid
condensation water. Then the bearings have to be screwed again tightly.
If the period of 1/2 year from the date of conservation to the date of commissioning is exceeded,
the above mentioned conservation steps have to be repeated.
Prior to commissioning the humidity--absorbing filling must be removed from the bearing housings
and the sleeve bearings must be filled up with bearing oil up to the marking on the oil level
indicators. The viscosity class of the bearing oil and the oil change intervals are indicated on an
additional plate.
H--R 263 en 03.09Page 29 of 33
Storage instructions
9.1.2 Commissioning
9.1.2.1 Before commissioning the insulation resistance of the winding must be measured by qualified
personnel phase against phase and phase against ground. Damp windings may cause leakage
currents, arcing and ruptures. In case of values 4⋅( UN[kV] + 1) [MΩ] measured at a winding
temperature of 20 oC the winding must be dried. Drying is possible by feeding of the winding with
single phase AC current. The voltage has to be adjusted in such a way that the recommended
values of the heating current in accordance with Illustrations a) and b) are not exceeded.
The temperature should reach approx. 80 oC and being active for several hours. Drying is also
possibleinadryingkiln.
IMAX =65%I
NIMAX =75%I
N
a) Δb) Y
Recommended heating circuits and maximum heating currents
9.1.2.2 In the case of motors with bearing lock this one has to be removed before commissioning.
9.1.2.3 Prior to commissioning the humidity--absorbing filling must be removed from the bearing
housings and the sleeve bearings must be filled up with bearing oil up to the marking on the oil
level indicators. The viscosity class of the bearing oil and the oil change intervals are indicated
on an additional plate.
9.1.3 For motors which are transported and stored in assembled condition with the machine to
be driven the following must be observed:
9.1.3.1 Storage
a) The free shaft ends must be greased before installation of the motors as well as all of
the other blank metal parts, e.g. foot-- and flange surfaces or supporting faces of terminal
boxes and covers. As protection against dust and humidity grease seals with antifriction
bearing grease are to be installed at the shaft opening.
b) A humidity--absorbing substance (e.g. Branogel) is to be filled into the terminal boxes of
the motors.
c) The machines are to be stored dry, dust--free and at room temperature.
d) For further measures the specifications according to paragraphs 9.1.1.2 to 9.1.1.4 are
applicable.
H--R 263 en 03.09 Page 30 of 33
Storage instructions
9.1.3.2 Commissioning
Before commissioning the humidity--absorbing substance (e.g. Branogel) is to be removed from
the terminal boxes and the measures according to 9.1.2 are to be performed.
9.1.3.3 For outdoor storage it is additionally to be observed:
Protective cover against the influence of sun and rain is to be provided, exchange of air must
be possible to avoid condensation water.
After 2 months it must always be checked if the protective measures according to 9.1.3.1a are
still given and functioning.
9.2 For motors which are stored for more than 2 up to 3 years before
commissioning additionally applies:
9.2.1 Storage
9.2.1.1 The manufacturer must be informed of the storage time in the purchase order.
9.2.1.2 Terminal box covers are to be provided with grease seals of antifriction bearing grease.
9.2.1.3 A humidity--absorbing substance (e.g. Branogel) must be in the terminal boxes.
9.2.1.4 Further measures acc. to paragraph 9.1.1.4.
9.2.2 Commissioning
9.2.2.1 Before commissioning the humidity--absorbing substance (e.g. Branogel) is to be removed from
the terminal boxes.
Further measures acc. to 9.1.2.
9.3 For motors with sleeve bearings to be stored for more than 3 years, the
paragraphs 9.1.1 and 9.1.3 are applicable and in addition for the bearing
sleeves as follows:
9.3.1 Storage
The sleeve bearings have to be completely dismantled and all points and components subject
to corrosion incl. the motor shaft have to be provided with Valvoline Tectyl 164 for conservation.
Dry film thickness is 100 to 150 μm, wet film thickness 200 μm. Seaworthy packing of the
components is required.
The conservation of the dismantled bearing and of the motor shaft has to be checked at regular
intervals of 2 years and renewed if insufficient.
9.3.2 Commissioning
Prior to commissioning the conservation must be removed by means of solvent Valvoline 150
or kerosene or a general solvent.
Mount the bearing and fill it up with bearing oil up to the marking on the oil level indicators. The
viscosity class of the bearing oil and the oil change intervals are indicated on an additional
plate.
Further measures acc. to 9.1.2 and 9.2.2.
9.4 Further to these storage instructions all data of these operating instructions is to be
considered.
The manufacturer’s warranty is only applicable if all of the above mentioned items are
strictly observed.
H--R 263 en 03.09Page 31 of 33
Faults and remedies
10. Faults and remedies
Fault Possible causes Remedy
Bearing is too hot Bearing noise Motor runs
unevenly
No or insufficient oil circuit for
oil--circulating lubrication
Activate the oil circuit
Bearing surface dirty Clean bearing surface
Wrong oil viscosity Check oil quality
Coupling forces are pulling
or pushing
Realign motor, correct coupling
Coolant temperature above 40 oCAdjust temperature of cooling air
Not enough oil in the bearing Fill up according to specifications
Bearing shell worn
e.g. caused by motor start without
bearing oil
Replace bearing shell
Unbalance caused by pulley or
coupling Exact balancing
Machine fastening instable Check fastening
Fault Possible causes Remedy
Motor does
not start
Motor is too
hot
High
decrease in
speed
Protective
device
triggers
Countertorque too high Check motor- and load torque
Mains voltage too low Check mains conditions
Phase interruption Check mains supply
Wrong winding connection Observe wiring diagram and
rating plate
Overload Compare data on rating plate
Too many starts per hour Observe rated duty type
Insufficient ventilation Check ventilation passages,
check direction of rotation
Ventilation passages dirty Clean
Short--circuit of winding
or terminal board Measure insulation resistance
Starting time exceeded Check starting conditions
H--R 263 en 03.09 Page 32 of 33
EC-Declaration of Conformity
11. EC-Declaration of Conformity
H--R 263 en 03.09Page 33 of 33
Appendix 11
Servicebericht / Service Report
Ausrichtprotokoll / Alignment Protocol
Seite /
Page ...
Servicenr. / Service No.: Bestellnr. / Order No.:
Type / Type: Seriennr. / Service No.:
Kupplungstype / Type of coupling: Durchmesser / Diameter:
Empfohlene Ausrichtgenauigkeit / Recommended accuracy for alignment*
Drehzahl / Speed
(rpm)
Parallelversatz / Offset
mm
Winkelversatz / Angular offset
mm / 100 mm coupling diameter
750 0,09 0,09
1500 0,06 0,05
3000 0,03 0,025
Gemessene Werte an der Kupplung / Measured values at the coupling
Parallelversatz / Offset Winkelversatz / Angular offset
Messung /
Measurement
Bemerkungen / Comments:
* Falls keine Werte vom Kupplungshersteller vorgeschrieben sind / If no values were specified by the coupling manufacturer
LOHER GmbH
P.O. Box 1164 S94095 Ruhstorf
Hans--Loher--Str. 32 S94099 Ruhstorf
Germany
Telephone +49--8531 39--0 SFax +49--8531 32895
e--mail: info@loher.com
http://www.loher.com
Satz Loher -- Druck Loher 03.09 Printed in Germany
