KSB IE4 Installation instructions

Asynchronous Motor
KSB IE4-Motor
75 kW to 132 kW
2-pole, 4-pole
Installation/Operating Manual

Legal information/Copyright
Installation/Operating Manual KSB IE4-Motor
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced,
edited or processed for any other purpose, nor otherwise transmitted, published or made available to a
third party without the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB SE & Co. KGaA, Frankenthal 2023-05-08

Contents
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Contents
Glossary .................................................................................................................................................. 5
1 General.................................................................................................................................................... 6
1.1 Principles ...........................................................................................................................................................6
1.2 Target group.....................................................................................................................................................6
1.3 Other applicable documents............................................................................................................................6
1.4 Symbols .............................................................................................................................................................6
1.5 Key to safety symbols/markings.......................................................................................................................6
2 Safety...................................................................................................................................................... 8
2.1 General..............................................................................................................................................................8
2.2 Intended use .....................................................................................................................................................8
2.3 Personnel qualification and training...............................................................................................................8
2.4 Consequences and risks caused by non-compliance with this manual .........................................................8
2.5 Safety awareness ..............................................................................................................................................9
2.6 Safety information for the user/operator.......................................................................................................9
2.7 Safety information for maintenance, inspection and installation ................................................................9
2.8 Unauthorised modes of operation..................................................................................................................9
2.9 Electromagnetic compatibility.........................................................................................................................9
3 Transport/Storage/Disposal ................................................................................................................ 10
3.1 Checking the condition upon delivery..........................................................................................................10
3.2 Transport.........................................................................................................................................................10
3.3 Storage/preservation......................................................................................................................................10
3.4 Disposal ...........................................................................................................................................................11
4 Description............................................................................................................................................ 12
4.1 General description ........................................................................................................................................12
4.2 Product information.......................................................................................................................................12
4.2.1 Product information as per Regulation No. 1907/2006(REACH) ................................................... 12
4.2.2 Product information as per Regulation (EU) 2019/1781................................................................. 12
4.3 Description......................................................................................................................................................13
4.4 Name plate......................................................................................................................................................14
4.5 Types of construction .....................................................................................................................................14
4.6 Mounting arrangements................................................................................................................................15
4.7 Noise characteristics .......................................................................................................................................16
4.8 Balancing.........................................................................................................................................................16
5 Installation at Site................................................................................................................................ 17
5.1 Checks to be carried out prior to installation...............................................................................................17
5.2 Installing the motor........................................................................................................................................18
5.3 Electrical connection ......................................................................................................................................19
5.3.1 Motor connection inside the terminal box...................................................................................... 19
5.3.2 Earthing ............................................................................................................................................. 21
5.3.3 Checking the direction of rotation .................................................................................................. 24
5.4 Tightening torques.........................................................................................................................................25
5.5 Installing and removing output components ...............................................................................................26
6 Commissioning/Start-up/Shutdown................................................................................................... 27
6.1 Checking earth conductor connection ..........................................................................................................27
6.2 Checking insulation resistance.......................................................................................................................27
6.3 Prerequisites for commissioning/start-up......................................................................................................27
6.4 Start-up ...........................................................................................................................................................28
6.5 Operating Limits.............................................................................................................................................28
6.5.1 Voltages and frequencies ................................................................................................................. 28
6.5.2 Maximum permissible speed ............................................................................................................ 28
6.5.3 Altitude, coolant temperature, ambient temperature................................................................... 28

Contents
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6.6 Shutdown........................................................................................................................................................29
6.7 Idle periods .....................................................................................................................................................29
6.8 Returning to service .......................................................................................................................................29
7 Servicing/Maintenance........................................................................................................................ 30
7.1 Safety regulations...........................................................................................................................................30
7.2 Maintenance/inspection.................................................................................................................................31
7.2.1 Supervision of operation .................................................................................................................. 31
7.2.2 Inspection .......................................................................................................................................... 32
7.3 Preparing disassembly....................................................................................................................................35
7.4 Dismantling the motor...................................................................................................................................35
7.4.1 General information/Safety regulations.......................................................................................... 35
7.4.2 Removing the protective roof (optional) ........................................................................................ 36
7.4.3 Dismantling the fan hood ................................................................................................................ 36
7.4.4 Dismantling the fan .......................................................................................................................... 36
7.4.5 Dismantling the rotor ....................................................................................................................... 36
7.4.6 Dismantling the bearings ................................................................................................................. 36
7.5 Assembling the motor....................................................................................................................................37
7.5.1 Fitting the bearings .......................................................................................................................... 37
7.5.2 Installing the rotor............................................................................................................................ 38
7.5.3 Mounting the fan ............................................................................................................................. 38
7.5.4 Mounting the fan hood.................................................................................................................... 39
7.5.5 Mounting the protective roof (optional) ........................................................................................ 39
8 Trouble-shooting.................................................................................................................................. 40
9 EU Declaration of Conformity............................................................................................................. 41
Index ..................................................................................................................................................... 42

Glossary
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Glossary
Drive end
End of motor with bare shaft end for connecting
the machine to be driven via a coupling or traction
sheave and belt (driven output or machine
element).
Non-drive end
End of motor with fan and fan hood.

1 General
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1 General
1.1 Principles
This operating manual is valid for the type series and variants indicated on the front
cover.
The operating manual describes the proper and safe use of this equipment in all
phases of operation.
The name plate indicates the type series, the main operating data and the serial
number. The serial number uniquely describes the product and is used as
identification in all further business processes.
In the event of damage, immediately contact your nearest KSB service facility to
maintain the right to claim under warranty.
1.2 Target group
This operating manual is aimed at the target group of trained and qualified specialist
technical personnel.
1.3 Other applicable documents
Table1: Overview of other applicable documents
Document Contents
Pump operating manual Proper and safe use of the pump in all phases of
operation
Wiring diagram Description of electrical connections
For accessories and/or integrated machinery components, observe the relevant
manufacturer's product literature.
1.4 Symbols
Table2: Symbols used in this manual
Symbol Description
✓Conditions which need to be fulfilled before proceeding with the
step-by-step instructions
⊳Safety instructions
⇨Result of an action
⇨Cross-references
1.
2.
Step-by-step instructions
Note
Recommendations and important information on how to handle
the product
1.5 Key to safety symbols/markings
Table3: Definition of safety symbols/markings
Symbol Description
!DANGER
DANGER
This signal word indicates a high-risk hazard which, if not avoided,
will result in death or serious injury.
WARNING
!
WARNING
This signal word indicates a medium-risk hazard which, if not
avoided, could result in death or serious injury.

1 General
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Symbol Description
CAUTION
CAUTION
This signal word indicates a hazard which, if not avoided, could
result in damage to the machine and its functions.
General hazard
In conjunction with one of the signal words this symbol indicates a
hazard which will or could result in death or serious injury.
Electrical hazard
In conjunction with one of the signal words this symbol indicates a
hazard involving electrical voltage and identifies information about
protection against electrical voltage.
Machine damage
In conjunction with the signal word CAUTION this symbol indicates
a hazard for the machine and its functions.

2 Safety
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2 Safety
!DANGER
All the information contained in this section refers to hazardous situations.
In addition to the present general safety information the action-related safety
information given in the other sections must be observed.
2.1 General
▪This operating manual contains general installation, operating and maintenance
instructions that must be observed to ensure safe operation of the system and
prevent personal injury and damage to property.
▪Comply with all the safety instructions given in the individual sections of this
operating manual.
▪The operating manual must be read and understood by the responsible specialist
personnel/operators prior to installation and commissioning.
▪The contents of this operating manual must be available to the specialist
personnel at the site at all times.
▪Information and markings attached directly to the product must always be
complied with and kept in a perfectly legible condition at all times. This applies
to, for example:
– Markings for connections
– Name plate
▪The operator is responsible for ensuring compliance with all local regulations not
taken into account.
▪If the motor is used in countries outside the European Community, adhere to the
regulations applicable to the relevant country. Also observe any local and
industry-specific regulations governing installation and safety.
2.2 Intended use
▪This product must only be operated within the limit values stated in the technical
product literature for the mains voltage, mains frequency, ambient temperature,
motor rating, speed, density, pressure, temperature and in compliance with any
other instructions provided in the operating manual or other applicable
documents.
▪The product must not be used in potentially explosive atmospheres.
▪The motor has been designed and constructed in accordance with the
requirements of Directive 2014/35/EU (Low-voltage Directive). The motor is
intended for use in industrial plants.
2.3 Personnel qualification and training
▪ All personnel involved must be fully qualified to install, operate, maintain and
inspect the product this manual refers to.
▪The responsibilities, competence and supervision of all personnel involved in
transport, installation, operation, maintenance and inspection must be clearly
defined by the operator.
▪Deficits in knowledge must be rectified by means of training and instruction
provided by sufficiently trained specialist personnel. If required, the operator can
commission the manufacturer/supplier to train the personnel.
▪ Training on the product must always be supervised by specialist technical
personnel.
2.4 Consequences and risks caused by non-compliance with this manual
▪Non-compliance with these operating instructions will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
▪Non-compliance can, for example, have the following consequences:

2 Safety
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– Hazards to persons due to electrical, thermal, mechanical and chemical
effects and explosions
– Failure of important product functions
– Failure of prescribed maintenance and servicing practices
– Hazard to the environment due to leakage of hazardous substances
2.5 Safety awareness
In addition to the safety information contained in this operating manual and the
intended use, the following safety regulations shall be complied with:
▪Accident prevention, health regulations and safety regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards, directives and laws
2.6 Safety information for the user/operator
▪Fit protective equipment (e.g. contact guards) supplied by the operator for hot,
cold or moving parts, and check that the equipment functions properly.
▪Do not remove any protective equipment (e.g. contact guards) during operation.
▪Provide the personnel with protective equipment and make sure it is used.
▪Eliminate all electrical hazards. (In this respect refer to the applicable national
safety regulations and/or regulations issued by the local energy supply
companies.)
2.7 Safety information for maintenance, inspection and installation
▪Modifications or alterations of the pump (set) are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts/components authorised by the
manufacturer. The use of other parts/components can invalidate any liability of
the manufacturer for resulting damage.
▪The operator ensures that maintenance, inspection and installation are
performed by authorised, qualified specialist personnel who are thoroughly
familiar with the manual.
▪Any work on the product shall only be performed when it has been disconnected
from the power supply (de-energised).
▪Carry out work on the product during standstill only.
▪As soon as the work has been completed, re-install and re-activate any safety-
relevant devices and protective devices. Before returning the product to service,
observe all instructions on commissioning.
2.8 Unauthorised modes of operation
Never operate the product outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the product supplied
is only valid if the product is used in accordance with its intended use.
2.9 Electromagnetic compatibility
When operating the motor on a frequency inverter always observe the frequency
inverter manufacturer's information on compliance with the Electromagnetic
Compatibility (EMC) Directive 2014/30/EU.
Take additional measures to ensure compliance with the Directive and obtain a
connection approval from the local energy supply company, if necessary.

3 Transport/Storage/Disposal
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3 Transport/Storage/Disposal
3.1 Checking the condition upon delivery
1. On transfer of goods, check each packaging unit for damage.
2. In the event of in-transit damage, assess the exact damage, document it and
notify KSB or the supplying dealer and the insurer about the damage in writing
immediately.
3.2 Transport
DANGER
Improper transport
Danger to life from falling parts!
▷Only transport the motor in the specified position.
▷Always use all lifting lugs available at the motor during transport.
▷Always screw in lifting lugs (lifting eyebolts) up to the contact face and tighten.
▷Use suitable, permitted lifting accessories.
Only remove any transport locks provided prior to commissioning and store or
disable. Use transport locks for additional transport tasks or re-enable.
To transport motors weighing more than 25 kg, suspend them from the lifting tackle
as shown.
Fig.1: Transporting the motor by two lifting lugs attached to sides of motor housing
3.3 Storage/preservation
Exposed machined metal
surfaces
Exposed locating surfaces (shaft ends, flange faces, centring spigots, connector
contacts) are treated with a layer of temporary corrosion protection (<6months) for
transport. Take suitable corrosion protection measures for extended storage periods.
Storage period Rotate the shaft once annually to avoid permanent standstill markings. Extended
storage periods decrease the service life (increase ageing) of the grease applied to
the rolling element bearings.
Closed rolling element
bearings
Replace closed rolling element bearings after 48months of storage.
Condensation during
storage
To prevent condensation inside the motor, switch on the motor standstill heater1).
If condensation water has formed and a drain hole is provided, position the motor in
such a way that the water drain plug is at the lowest point of the housing. Drain off
the condensation water. (ðSection7.2.2.1,Page33)
1If any

3 Transport/Storage/Disposal
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Drain off the condensation water as required by the ambient conditions but at least
every 6months.
Outdoor storage
CAUTION
Damage during storage due to humidity, dirt or vermin
Corrosion/contamination of the drive!
▷Cover all components with water-proof material. Covers or tarpaulins must not
contact the surface of the stored goods.
▷Ensure sufficient air circulation, e.g. by inserting wooden spacers.
▷To ensure protection against ground moisture, arrange motors and packaged
motors on pallets, bars or foundations.
▷Prevent the possibility of the product sinking into the ground.
Implement appropriate measures to accommodate extreme climatic conditions, e.g.
salty, dusty or moist atmospheres.
Indoor storage
Storage rooms should provide protection against extreme weather conditions and be
dry, dust-free, frost-free, jolt-free, vibration-free and well ventilated.
3.4 Disposal
Electrical or electronic equipment marked with the adjacent symbol must not be
disposed of in household waste at the end of its service life.
Contact your local waste disposal partner for returns.
If the used electrical or electronic equipment contains personal data, the operator is
responsible for deleting it before the equipment is returned.
Due to some components, the product is classified as special waste.
1. Dismantle the product.
2. Separate and sort the materials, e.g. by:
- Metals
- Plastics
- Electronic waste
- Greases and other lubricants
3. Dispose of materials in accordance with local regulations or in another
controlled manner. PCBs, power electronics, capacitors and electronic
components are all hazardous waste.

4 Description
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4 Description
4.1 General description
Low-voltage asynchronous motor of efficiency class IE4 to IEC 60034-30 for operation
on the public power grid or on a frequency inverter
4.2 Product information
4.2.1 Product information as per Regulation No. 1907/2006(REACH)
For information as per European chemicals regulation (EC) No. 1907/2006 (REACH)
see https://www.ksb.com/en-global/company/corporate-responsibility/reach.
4.2.2 Product information as per Regulation (EU) 2019/1781
I
f
90%
50%
50%
100%
25%
PL,M (25;100) PL,M (50;100) PL,M (90;100)
PL,M (50;50) PL,M (90;50)
PL,M (25;25) PL,M (50;25)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Table4: Efficiency
Model ID Efficiency
Factory-dependent motor material
number
KSB material number ηN
[%]
η75%
2)
[%]
η50%
2)
[%]
5214341 5214248 5214315 5214325 5214272 5214352 95,6 95,1 94,1
5214338 5214333 5214319 5214322 5214277 5214356 96,0 95,9 95,5
5214342 5214249 5214316 5214326 5214273 5214353 95,8 95,3 94,5
5214339 5214334 5214360 5214323 5214278 5214357 96,1 96,0 95,5
5214343 5214330 5214317 5214327 5214274 5214354 96,0 95,6 95,0
5214340 5214335 5214361 5214324 5214279 5214358 96,3 96,1 95,6
5214337 5214331 5214318 5214321 5214275 5214355 96,2 95,9 95,1
5214332 5214336 5214362 5214276 5214320 5214359 96,4 96,1 95,4
Efficiency class: IE4
Manufacturer: KSB SE & Co. KGaA
Johann-Klein-Straße 9
67227 Frankenthal
HRB 65657 Ludwigshafen
2Minimum

4 Description
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Table5: Model-dependent electrical data
Model ID Number of
poles
Rated output power Rated input frequency Nominal voltage
Nominal
speed
PNf1U1
Factory-dependent motor material number [kW] [Hz] [V] [rpm]
5214341 5214248 5214315 2 75 50 400 2850
5214338 5214333 5214319 4 1410
5214342 5214249 5214316 2 90 2810
5214339 5214334 5214360 4 1440
5214343 5214330 5214317 2 110 2860
5214340 5214335 5214361 4 1445
5214337 5214331 5214318 2 132 2855
5214332 5214336 5214362 4 1430
Number of phases: 3
Installation altitude [m]: 1000
Ambient air temperature range [°C] -20 to 40
Maximum in-service temperature [°C] 130
4.3 Description
Table6: Designation example
Position
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
- 2 - 7 5 , 0 - 2 8 0 S - B W B 7 F 3 N T S D W F W W K S W
Table7: Designation key
Position Code Description
1-2 Number of poles
2 2 poles
4 4 poles
4-7 Rated power
7 5 , 0 75kW
9-12 IEC frame size
2 2 5 M Shaft centreline height [mm] = IEC size
14 Enclosure
B IP55
15 Type of protection
W Non-explosion-proof
16 Rated voltage and rated frequency
B 3~, AC, 400 VΔ, 690 VY, 50Hz
17 Efficiency class
7 IE4
18 Thermal class
F Thermal class F
19 Motor and winding protection
3 3 PTCs
20 Direction of rotation
N Clockwise and counter-clockwise (bi-directional)
21 Position of terminal box
T Terminal box on top

4 Description
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Position Code Description
22 Bolted feet
S Bolted feet
W Without feet
H Integrally cast feet
23 Position of fixed bearing
D Fixed bearing, drive end
24 Protective roof
W Without protective roof
25 Motor flange
F EN 50347 Type FF
W Without flange
26 Operation on inverter
U Operation on inverter permitted
W Without approvals
27 Approval
W Without approvals
28-30 Manufacturer
K W C KSB IE4 motor
4.4 Name plate
The name plate provides, as a minimum, the following information:
▪Manufacturer: KSB SE & Co. KGaA, Johann-Klein-Straße 9, 67227 Frankenthal
(Germany)
▪KSB material number
▪Type designation: KSB IE4 motor
▪Year of construction
▪Number of phase windings
▪Standards for design
▪Enclosure
▪Efficiency class to IEC60034-30
▪Thermal class
▪Rated power/ rated powers
▪Rated voltage/ rated voltages
▪Rated frequency/ rated frequencies
▪Rated current/ rated currents
▪Rated speed/ rated speeds
▪Rated power factor/ rated power factors
▪Total weight
4.5 Types of construction
The motors are available in different types of construction:

4 Description
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Table8: Types of construction and installation variants
Type of construction Shaft centreline
height
[mm]
IM codes
Flange type3) With
foot
Without ✘280 to 315 B3
Flange with clearance
holes (FF)
- 280 to 315 V1, B5
✘280 to 315 V154), B35
4.6 Mounting arrangements
IM codes Illustration
IM B3
IM B5
IM B35
IM V1
IM V15
3Designations to EN50347
4Detachable feet

4 Description
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4.7 Noise characteristics
The noise characteristics stipulated by DINEN60034-9 are complied with.
4.8 Balancing
The rotor is balanced dynamically in accordance with the ISO1940-1 standard. The
rotor is balanced to balance quality grade G2.5.
The motor complies with vibration class A to IEC60034-14.
Marking
▪For motors with key, the rotors are balanced dynamically with a half key ("H") as
standard in accordance with ISO21940-32 requirements. The output element
must also be balanced with a half key in accordance with the key convention.

5 Installation at Site
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5 Installation at Site
5.1 Checks to be carried out prior to installation
Place of installation
WARNING
Installation on a mounting surface which is unsecured and cannot support the load
Personal injury and damage to property!
▷Use a concrete of compressive strength class C12/15 which meets the
requirements of exposure class XC1 to EN 206.
▷The mounting surface must be set, even, and level.
▷Observe the weights indicated.
1. Check the structural requirements.
All structural work required must have been prepared in accordance with the
dimensions stated in the outline drawing/general arrangement drawing.
Protective roof/additional
roofing
Install a protective roof or additional roofing for vertical installation.
Vertical installation ▪For vertical installation with the shaft end pointed downwards to prevent
foreign objects from falling into the fan hood.
▪For vertical installation with the shaft end pointed upwards to prevent fluid
ingress along the length of the shaft.
Outdoor installation Shield the motor by implementing suitable protection measures in order to prevent
condensation from forming and to avoid the long-term effects caused by direct
exposure to sunlight, rain, snow, ice and dust.
Flatness tolerance of contact surfaces
For foot-mounted motors, adhere to the following flatness tolerance of the contact
surfaces for the motor feet.
Table9: Flatness tolerance of contact surfaces for motor feet
Shaft centreline height Flatness tolerance (mm)
≥ 280mm 0,15
Ventilation
WARNING
Improper installation
Drive overheated!
▷Maintain the specified minimum distances to neighbouring assemblies.
▷Never restrict the ventilation ducting to/from the drive.
▷Prevent exhaust air from neighbouring assemblies from being drawn in directly.
X
Fig.2: Minimum distanceX

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Table10: Minimum distanceX to neighbouring assemblies
Motors with shaft centreline height [mm] Minimum distanceX [mm]
280 - 315 110
355 140
Condensation water drain If a drain hole is provided, position the motor in such a way that the water drain plug
is at the lowest point of the housing. The motor is supplied with the water drain plug
closed.
5.2 Installing the motor
Checks prior to installation work
▪Repair any damage to the paintwork. (ðSection7.2.2.2,Page33)
▪Remove any anti-corrosives applied to exposed metal parts that are required to
ensure proper assembly or installation.
Alignment and fastening
NOTE
Maintain the vibration levels to ISO 10816-1 during operation.
Observe the following when aligning and fastening:
▪Ensure that the motor feet are resting evenly on the support surface.
▪Ensure that feet and flanges are mounted as specified in the manual.
▪Avoid rigid couplings.
▪Ensure precise alignment for direct coupling.
▪Ensure that mounting surfaces are free from contamination.
▪Avoid resonances caused by the structure at the rotational frequency and double
mains frequency.
▪Unusual noise that may occur when rotating the rotor by hand.
Compensation of radial
misalignment at the
coupling and horizontal
adjustment
The following measures are required to compensate radial misalignment at the
coupling and horizontally adjust the motor in relation to the driven machine (e.g. the
pump):
▪Vertical positioning
To avoid distortion (warping) of the driven machine and the motor, place thin
metal sheets under the motor feet.
The number of shims should be restricted to a minimum, in other words, they
should only be stacked if this is unavoidable.
▪Horizontal positioning
For horizontal positioning, laterally shift the motor on the foundation while
maintaining axial alignment (to prevent angular misalignment).
Ensure a uniform circumferential axial clearance at the coupling when
positioning.
▪Smooth running characteristics
A stable, vibration-free foundation to DIN4024, exact alignment of the coupling
and a well-balanced output element (coupling, pulley, fan, etc.) are prerequisites
for smooth, vibration-free operation of the motor.
Complete balancing of the motor with the output element may be required.
Note the information and evaluation criteria to ISO 10816.
▪Foot/flange mounting
Use the thread sizes specified by EN 50347 for fastening the foot and flange of
the motor to the foundation and to the motor flange respectively. Fasten the
motor at four foot holes or flange bolt holes positioned in rectangular
arrangement to each other. The customer is responsible for selecting the
strength of the fastening elements.

5 Installation at Site
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Property class recommendations: Class5.6 or higher for fastening elements for
motors with shaft centreline height up to and including 160 mm, and class 8.8 or
higher for motors with shaft centreline height 180 mm.
NOTE
Lifting lugs that have been screwed in must either be tightened or removed after
installation.
5.3 Electrical connection
DANGER
Hazardous voltage
Danger of death from electric shock!
▷Have all work performed only by qualified specialist personnel and only when
the drive is at a standstill and secured against unintentional start-up. This also
applies to auxiliary circuits (e.g. standstill heater).
▷The drive must not be electrically connected at any point in time when work is
performed on the open terminal box.
▷Ensure that the rotor cannot turn or be turned at any point in time when work
is performed on the open terminal box.
WARNING
Incorrect connection to the mains
Damage to the mains network, short circuit!
▷Observe the technical specifications of the local energy supply companies.
NOTE
Always protect three-phase motors with a current-dependent overload protection
device with additional phase failure protection.
Select the motor connection cables in accordance with IEC60364, taking into account
the current load of the cable at the given ambient temperature and the requisite
heat dissipation to IEC/EN60204-1 as a result of cable routing.
5.3.1 Motor connection inside the terminal box
Observe the following when performing any work on the terminal box:
▪Always use the original sealing element to close the terminal box so that it is dust
tight and watertight.
▪Do not damage any components inside the terminal box, such as terminal board
and cable connections.
▪Ensure that no foreign matter, contamination or moisture are present in the
terminal box. Terminal box cable entries to DIN42925.
▪Close additional open cable entries, using O-rings or suitable gaskets.
▪Observe prescribed tightening torques for cable glands and other screws/bolts.
▪When retrofitting cable glands to safeguard the required level of enclosure
protection, ensure that the gasket is seated properly on the outside of the
terminal box.

5 Installation at Site
20 of 44 KSB IE4-Motor
4080.8/07-EN
Connecting the motor
1. Check the electrical voltage of the available power supply network against the
data on the motor name plate.
2. Connect the earth conductor (PE).
3. Knock out any knock-out openings in the terminal box. While doing this, avoid
causing damage to the terminal board, cable connections, etc. inside the
terminal box.
4. Connect the motor in star configuration or delta configuration in accordance
with the rated voltage (see name plate) and the available power supply
network. Alternatively, the 6-core connection of the three windings can be
connected to an external switchgear for automatic switchover.
Fig.3: Star configuration
Fig.4: Delta configuration
ðThe terminal boards of motors with shaft centreline heights of 80mm and
90mm may differ from the schematic shown. In this case, star configuration
or delta configuration is selected by setting jumpers.
5. Optionally, the 2-core connection of the series-connected PTC thermistors for
temperature monitoring of the motor can be connected to terminals 1T1 and
1T2 with a suitable thermistor relay (PTC thermistor tripping unit). Observe the
maximum measuring voltage!