Siemens SIMOTICS SD User manual

Low-voltage motors
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SIMOTICS GP, SD, DP, XP
Low-Voltage Motors
Low-voltage motors
Operating Instructions
05/2014
5 610 00000 02 000
Introduction
1
Safety information
2
Description
3
Preparing for use
4
Assembly
5
Electrical connection
6
Commissioning
7
Operation
8
Maintenance
9
Spare parts
10
Disposal
11
Appendix
A
Technical data and drawings
B

Siemens AG
Industry Sector
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: 5 610 00000 02 000
Ⓟ
05/2014 Subject to change
Copyright © Siemens AG 2008 - 2014.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by
personnel qualified
for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 5
Table of contents
1 Introduction............................................................................................................................................. 9
1.1 About these instructions.................................................................................................................9
1.2 Information for the reader ..............................................................................................................9
2 Safety information ................................................................................................................................. 11
2.1 Information for those responsible for the plant or system............................................................11
2.2 The five safety rules.....................................................................................................................11
2.3 Qualified personnel ......................................................................................................................12
2.4 The safe use of electrical machines.............................................................................................12
2.5 Safety instructions: Explosion-proof machines ............................................................................13
2.6 Special designs and construction versions..................................................................................13
2.7 Special conditions for explosion-proof machines.........................................................................13
3 Description............................................................................................................................................ 15
3.1 Area of application .......................................................................................................................15
3.1.1 CE marking ..................................................................................................................................15
3.2 Rating plates ................................................................................................................................16
3.3 Installation ....................................................................................................................................17
3.3.1 Machine design............................................................................................................................17
3.3.2 Regulations ..................................................................................................................................18
3.3.3 Cooling and ventilation.................................................................................................................19
3.3.3.1 General ........................................................................................................................................19
3.3.3.2 Machines with a fan .....................................................................................................................19
3.3.3.3 Machines without a fan (optional) ................................................................................................20
3.3.4 Bearings .......................................................................................................................................21
3.3.5 Balancing .....................................................................................................................................21
3.3.6 Types of construction/method of installation................................................................................22
3.3.7 Degree of protection ....................................................................................................................24
3.3.8 Optional built-on and built-in accessories ....................................................................................25
4 Preparing for use .................................................................................................................................. 27
4.1 Delivery ........................................................................................................................................27
4.2 Transport......................................................................................................................................27
4.3 Storage.........................................................................................................................................28
4.4 Electromagnetic compatibility ......................................................................................................29
5 Assembly.............................................................................................................................................. 31
5.1 Installation ....................................................................................................................................31
5.1.1 Safety instructions........................................................................................................................31
5.1.2 Safety instructions: Explosion-proof machines ............................................................................31
5.1.3 Machine installation .....................................................................................................................32
5.1.4 Cooling .........................................................................................................................................33
5.1.4.1 Ventilation ....................................................................................................................................33
5.1.5 Machines with type of construction IM B15, IM B9, IM V8 and IM V9.........................................34

Table of contents
Low-voltage motors
6Operating Instructions, 05/2014, 5 610 00000 02 000
5.1.6 Balancing..................................................................................................................................... 35
5.1.6.1 Mounting and withdrawing output transmission elements .......................................................... 36
5.1.7 Noise emission............................................................................................................................ 37
5.2 Alignment and fastening.............................................................................................................. 37
5.2.1 Flatness of supporting surfaces .................................................................................................. 38
5.2.2 Machine frame mounting feet (special design) ........................................................................... 38
6 Electrical connection ............................................................................................................................. 39
6.1 Connecting the machine ............................................................................................................. 39
6.1.1 General........................................................................................................................................ 39
6.1.2 Terminal designations ................................................................................................................. 41
6.1.3 Direction of rotation ..................................................................................................................... 41
6.1.4 Connection with/without cable lugs............................................................................................. 41
6.1.5 Connection with cable lug for explosion-protected machines..................................................... 42
6.1.6 Connecting protruding cables ..................................................................................................... 42
6.1.7 Cable glands ............................................................................................................................... 42
6.1.7.1 Mounting position of sheet metal nuts in screw-type connections.............................................. 43
6.1.8 Terminal box ............................................................................................................................... 44
6.1.8.1 General........................................................................................................................................ 44
6.1.8.2 Versions ...................................................................................................................................... 45
6.1.8.3 Protruding connection cables...................................................................................................... 47
6.1.8.4 Connecting the temperature sensor/anti-condensation heater................................................... 48
6.1.8.5 Cable entry.................................................................................................................................. 50
6.1.8.6 Thread sizes in terminal box ....................................................................................................... 51
6.2 Tightening torques ...................................................................................................................... 53
6.2.1 Electrical connections - Termincal board connections................................................................ 53
6.2.2 Cable glands ............................................................................................................................... 54
6.2.3 Terminal boxes, end shields, grounding conductors, sheet metal fan covers ............................ 54
6.3 Conductor connection ................................................................................................................. 55
6.3.1 General information on conductor connection ............................................................................ 55
6.3.2 Type of conductor connection..................................................................................................... 56
6.4 Connecting the grounding conductor .......................................................................................... 59
6.4.1 General information on connecting the grounding conductor ..................................................... 59
6.4.2 Grounding connection type ......................................................................................................... 60
6.4.3 Minimum surface area of grounding conductor........................................................................... 61
6.4.4 Size of grounding conductor screw............................................................................................. 62
6.5 Final measures............................................................................................................................ 62
6.6 Connecting optional mounted components................................................................................. 63
6.6.1 External fan, incremental encoder, brake ................................................................................... 63
6.6.1.1 Mounting a brake ........................................................................................................................ 63
6.6.1.2 Mounted external fan .................................................................................................................. 63
6.7 Connecting converters ................................................................................................................ 64
7 Commissioning ..................................................................................................................................... 67
7.1 Insulation resistance ................................................................................................................... 67
7.1.1 Testing the insulation resistance................................................................................................. 67
7.2 Measures before start-up ............................................................................................................ 69
7.3 Switching on................................................................................................................................ 71

Table of contents
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 7
8 Operation.............................................................................................................................................. 73
8.1 Safety instructions........................................................................................................................73
8.1.1 Safety instructions during operation.............................................................................................73
8.1.2 Safety information for explosion-protected machines in operation..............................................75
8.1.3 Safety instructions for cleaning....................................................................................................76
8.1.4 Machines with textile fan covers ..................................................................................................76
8.2 Stoppages ....................................................................................................................................76
8.3 Fault tables...................................................................................................................................78
8.4 Deactivating .................................................................................................................................80
8.5 Class ............................................................................................................................................80
8.5.1 Zone 1 with type of protection Ex de IIC Gb (flameproof enclosure "d" for the machine
and increased safety "e" for the terminal box) .............................................................................80
8.5.2 Zone 1 with Ex e IIC Gb type of protection (increased safety "e")...............................................81
8.5.3 Zone 1 with Ex e IIB Gb type of protection (increased safety "e")...............................................82
8.5.4 Zone 2 with type of protection Ex nA IIC Gc, non sparking .........................................................83
8.5.5 Zone 2 with type of protection Ex nA IIB Gc, non sparking .........................................................84
8.5.6 Zone 21 ........................................................................................................................................85
8.5.7 Zone 22 ........................................................................................................................................86
9 Maintenance ......................................................................................................................................... 87
9.1 Preparation and notes..................................................................................................................87
9.1.1 North American market ................................................................................................................88
9.1.2 Customs union Eurasia................................................................................................................88
9.1.3 Touch up any damaged paintwork...............................................................................................90
9.1.4 Repainting ....................................................................................................................................90
9.2 Inspection.....................................................................................................................................91
9.2.1 General inspection specifications ................................................................................................91
9.2.2 Optional built-on accessories.......................................................................................................91
9.2.3 Initial inspection............................................................................................................................91
9.2.4 Main inspection ............................................................................................................................92
9.3 Maintenance.................................................................................................................................93
9.3.1 Maintenance intervals ..................................................................................................................93
9.3.2 Regreasing (optional)...................................................................................................................94
9.3.3 Cleaning .......................................................................................................................................94
9.3.4 Drain condensate.........................................................................................................................95
9.4 Corrective maintenance ...............................................................................................................96
9.4.1 Instructions for repair ...................................................................................................................96
9.4.2 Storage.........................................................................................................................................96
9.4.2.1 Changing bearings.......................................................................................................................97
9.4.2.2 Replacing bearings in explosion-proof machines ........................................................................98
9.4.3 Dismantling ..................................................................................................................................98
9.4.3.1 Bearing bushes ............................................................................................................................99
9.4.3.2 Links.............................................................................................................................................99
9.4.4 Assembly......................................................................................................................................99
9.4.4.1 Assemly........................................................................................................................................99
9.4.4.2 Fitting the bearing cartridges .......................................................................................................99
9.4.4.3 Fitting bearings...........................................................................................................................100
9.4.4.4 Mounting fans.............................................................................................................................100

Table of contents
Low-voltage motors
8Operating Instructions, 05/2014, 5 610 00000 02 000
9.4.4.5 Mounting the fan cover.............................................................................................................. 101
9.4.4.6 Canopy; mounting a rotary pulse encoder under the canopy................................................... 101
9.4.4.7 Reassembly: Miscellaneous information................................................................................... 101
9.4.5 Screw lock washers .................................................................................................................. 102
9.4.6 Electrical connections - Termincal board connections.............................................................. 102
9.4.7 Cable glands ............................................................................................................................. 102
9.4.8 Terminal boxes, end shields, grounding conductors, sheet metal fan covers .......................... 103
9.4.9 Optional add-on units ................................................................................................................ 104
10 Spare parts..........................................................................................................................................105
10.1 Parts order................................................................................................................................. 105
10.2 Parts groups definition .............................................................................................................. 105
10.3 Ordering example...................................................................................................................... 106
10.4 Machine parts............................................................................................................................ 107
10.5 Standardized parts .................................................................................................................... 110
11 Disposal...............................................................................................................................................113
11.1 Introduction................................................................................................................................ 113
11.2 Preparing for disassembly......................................................................................................... 113
11.3 Dismantling the machine........................................................................................................... 113
11.4 Disposal of components............................................................................................................ 114
A Appendix .............................................................................................................................................115
A.1 SIEMENS Service Center ......................................................................................................... 115
A.2 Languages of operating instructions available in the Internet................................................... 115
A.3 Further documents .................................................................................................................... 116
B Technical data and drawings................................................................................................................117
B.1 Exploded drawings.................................................................................................................... 117
B.1.1 1LA,1LP,1MA,1MF,1PP6/7/9 FS 56 ... 90L .............................................................................. 117
B.1.2 1LA,1LP,1MA,1MF,1PP6/7/9 FS 100 ... 160 ............................................................................ 118
B.1.3 1LA5180 ... 225......................................................................................................................... 119
B.1.4 1MA6180 ... 200........................................................................................................................ 120
B.1.5 Terminal boxes 1MA6180 ... 200 .............................................................................................. 121
B.1.6 1MJ6070 ... 200 ........................................................................................................................ 122
B.1.7 Terminal boxes 1MJ6070 ... 160............................................................................................... 123
B.1.8 Terminal boxes 1MJ6180 ... 200 (Ex e) .................................................................................... 124
B.1.9 Terminal boxes 1MJ6180 ... 200 (Ex d) .................................................................................... 125
B.1.10 1LE1/ 1MB1 BG 80 ... 160 aluminum ....................................................................................... 126
B.1.11 1LE1 / 1MB1 BG 100 ... 200 cast iron ...................................................................................... 127
B.1.12 1LE1 / 1MB1 BG 225 ... 315 cast iron ...................................................................................... 128
B.1.13 1LG4/6 FS 180 ... 315............................................................................................................... 129
B.1.14 Terminal box gk330, gt320, gk430, gt420................................................................................. 130
B.1.15 Terminal box gk431, gt421, gt520, gt540 ................................................................................. 131
B.1.16 Terminal box 1LG4/6 gt620, gt640, gt791 ................................................................................ 132
Glossary ..............................................................................................................................................133
Index ...................................................................................................................................................135

Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 9
Introduction
1
1.1
About these instructions
These instructions describe the machine and explain how to handle it, from initial delivery to
final disposal of the equipment. Keep these instructions for later use.
Read these operating instructions before you handle the machine and follow the instructions
to become familiar with its design and operating principles and thus ensure safe, problem-
free machine operation and long service life.
If you have suggestions for improving the document, please contact the Service Center.
Text format features
The warning notice system is explained on the rear of the inside front. Always follow the
safety instructions and notices in these instructions.
In addition to the safety-related warning notices which you must read, you will find the text in
these instructions is formatted in the following way:
1. Handling instructions are always formatted as a numbered list. Always perform the steps
in the order given.
●Lists are formatted as bulleted lists.
–Lists on the second level are hyphenated.
Note
A Note is an important item of information about the product, handling of the produc
t or the
relevant section of the document. Notes provide you with help or further suggestions/ideas.
1.2
Information for the reader
Explanation of the icons
Note for 1LE1, 1MB1, 1PC1, 1PC3 machines
Note for 1LE1, 1PC1 and 1PC3 machines, frame sizes 80 and 90 with central terminal box
locking
Information about explosion-protected machines

Introduction
1.2 Information for the reader
Low-voltage motors
10 Operating Instructions, 05/2014, 5 610 00000 02 000

Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 11
Safety information
2
2.1
Information for those responsible for the plant or system
This electric machine has been designed and built in accordance with the specifications
contained in Directive 2006/95/EC ("Low-Voltage Directive") and is intended for use in
industrial plants. Please observe the country-specific regulations when using the electric
machine outside the European Community. Follow the local and industry-specific safety and
setup regulations.
The persons responsible for the plant must ensure the following:
●Planning and configuration work and all work carried out on and with the machine is only
to be done by qualified personnel.
●The operating instructions must always be available for all work.
●The technical data as well as the specifications relating to the permissible installation,
connection, ambient and operating conditions are taken into account at all times.
●The specific setup and safety regulations as well as regulations on the use of personal
protective equipment are observed.
Note
Use the services and support provided by the appropriate Service
Center for planning,
installation
, commissioning, and servicing work.
You will find safety instructions in the individual sections of this document. Follow the safety
instructions for your own safety, to protect other people and to avoid damage to property.
Observe the following safety instructions for all activities on and with the machine.
2.2
The five safety rules
For your personal safety and to prevent material damage when carrying out any work,
always observe the safety instructions and the following five safety rules, according to
EN 50110-1 "Dead working". Apply the five safety rules in the sequence stated before
starting work.
Five safety rules
1. Disconnect completely.
Disconnect the auxiliary circuits, for example anti-condensation heating.
2. Secure against reconnection.
3. Verify absence of operating voltage.
4. Carry out earthing and short-short-circuiting.
5. Provide protection against adjacent live parts.
To energize the system, apply the measures in reverse order.

Safety information
2.3 Qualified personnel
Low-voltage motors
12 Operating Instructions, 05/2014, 5 610 00000 02 000
2.3
Qualified personnel
All work at the machine must be carried out by qualified personnel only. For the purpose of
this documentation, qualified personnel is taken to mean people who fulfill the following
requirements:
●Through appropriate training and experience, they are able to recognize and avoid risks
and potential dangers in their particular field of activity.
●They have been instructed to carry out work on the machine by the appropriate person
responsible.
2.4
The safe use of electrical machines
WARNING
High voltages
Electrical machines contain live parts. Fatal or severe injuries and substantial material
damage can occur if the required covers are removed or if the machines are not handled,
operated, or maintained properly.
•Only remove covers in compliance with the applicable regulations.
•Operate the machines properly.
•Perform regular maintenance on the machine.
WARNING
Rotating parts
Electrical machines contain dangerous rotating parts. Fatal or severe injuries and
substantial material damage can occur if the required covers are removed or if the
machines are not handled, operated, or maintained properly.
•Only remove covers in compliance with the applicable regulations.
•Operate the machines properly.
•Perform regular maintenance on the machine.
•Secure free-standing shaft extensions.
WARNING
Risk of burning
Electrical machines have hot surfaces. Fatal or severe injuries and substantial material
damage can occur if the required covers are removed or if the machines are not handled,
operated, or maintained properly.
•Allow the machine to cool down before starting any work on it.
•Only remove covers in compliance with the applicable regulations.
•Operate the machines properly.

Safety information
2.5 Safety instructions: Explosion-proof machines
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 13
2.5
Safety instructions: Explosion-proof machines
Note
The increased level of danger in hazardous areas demands that you pay particular attention
to the notes marked with
.
2.6
Special designs and construction versions
Note
Before carry out any work on the machine, determine the machine version.
If any deviations or uncertainties arise, contact the manufacturer specifying the type
designation and serial number (see rati
ng plate) or have the equipment repaired by a
Siemens
Service Center.
2.7
Special conditions for explosion-proof machines
Special conditions for the safe application of explosion-protected machines marked with
X
(excerpt from the EC type-examination certificate, point 17)
Flameproof enclosure "d"
Flameproof joints may only be repaired strictly in accordance with the manufacturer's design
specifications. Repair in accordance with the values in Tables 1 and 2 of EN / IEC 60079-1 is
not permitted.
Zone 21
●Do not operate the motors with excessively thick deposits of dust.
●When the motors are mounted with the free shaft end pointing upwards, prevent foreign
bodies from dropping into the ventilation openings using an appropriate mechanical
design.
●For motors with a fixed connecting cable: The free end of the cable must be connected
according to valid regulations for electrical installations.

Safety information
2.7 Special conditions for explosion-proof machines
Low-voltage motors
14 Operating Instructions, 05/2014, 5 610 00000 02 000

Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 15
Description
3
3.1
Area of application
Overview
The three-phase machines of this series are used as industrial drives. They are designed for
a wide range of drive applications both for line operation as well as in conjunction with
frequency converters.
They are characterized by their high power density, extreme robustness, long service life
and outstanding reliability.
Intended use of the machines
These machines are intended for industrial installations. They comply with the harmonized
standards of the series EN / IEC 60034 (VDE 0530). Their use in hazardous areas is
forbidden unless the marking on the rating plate expressly permits this operation. If
other/more wide-ranging demands (e.g. protection so that they cannot be touched by
children) are made in special cases – i.e. use in non-industrial installations – these conditions
must have been complied with in the plant or system itself when the motors are installed.
Note
Machine directive
Low
-voltage motors are components designed for installation in machines in accordance
with the current Machinery Directive. They must not be commis
sioned until it has been
verified that the end product complies with this directive (refer to EN 60204
-1).
3.1.1
CE marking
Note
Use of machines without CE identification
Machines without
marking are intended for operation outside the European Economic
Area (EEA). Do not use any machines without CE mark within of the EEA!

Description
3.2 Rating plates
Low-voltage motors
16 Operating Instructions, 05/2014, 5 610 00000 02 000
3.2
Rating plates
Rating plate
The rating plate shows the identification data and the most important technical data. The
data on the rating plate and the contractual agreements define the limits of proper usage.
Data on the rating plate
Item
Description
Item
Description
General data
Electrical data
1
Type of machine
31
Electrical data
2
Machine type
32
-
3 Serial number (incl. date of manufacture
YY.MM )
33 Rated voltage [V]
4
Standards
34
Winding connections
5
Additional details (optional)
35
Frequency [Hz]
6
Customer data (optional)
36
Rated power [kW]
7
Country of origin
37
Rated current [A]
8
Production location
38
Power factor [cosφ]
9 Identification number of testing agency
(optional)
39 Rated speed [rpm]
10
Regulations (optional)
40
Efficiency class
Mechanical data
41
Efficiency
11
Frame size
42
Torque [Nm] (optional)
12
Type of construction
43
Rated power [hp] (optional)
13
Degree of protection
44
Service factor (optional)
14
Machine weight [kg]
45
Starting current ratio (optional)
15
Temperature class
46
Operating mode (optional)
16
Ambient temperature range (optional)
47
NEMA data (optional)
17 Installation altitude (only if higher than 1000
m)
48 Anti-condensation heating (optional)
18
Vibration severity grade
49
Company logo
19
Bearing sizes
20
Relubrication data/specifications (optional)
21
Brake data (optional)

Description
3.3 Installation
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 17
Figure 3-1 Examples of rating plates
3.3
Installation
3.3.1
Machine design
Machines of this series are low-voltage three-phase asynchronous drives with a cylindrical
shaft end and featherkey way. They can be supplied as single-speed machines with different
efficiency classes or as pole changing machines for several speeds.
In the case of machines with feet (IM B3 type of construction), the feet are cast or bolted on.
It is possible to change the feet bolted on the housing of the machine, e.g. to change the
position of the terminal box; however, only have this performed by an authorized retrofit
partner.
With the appropriate post working, ensure that the feet mounting surfaces are again on one
plane and parallel to the machine shaft, and shim when required. Professionally touch up
damaged painted surfaces.

Description
3.3 Installation
Low-voltage motors
18 Operating Instructions, 05/2014, 5 610 00000 02 000
3.3.2
Regulations
Standard motors
The regulations and standards used as basis to design and test this machine are stamped
on the rating plate. The machine design basically complies with the following standards:
Table 3- 1 Applicable general regulations
Feature
Standard
Dimensioning and operating behavior
EN / IEC 60034-1
Procedure for determining the losses and the efficiency of rotating electrical machines and
inspections
EN / IEC 60034-2-1
EN / IEC 60034-2-2
EN / IEC 60034-2-3
Degree of protection
EN / IEC 60034-5
Cooling
EN / IEC 60034-6
Type of construction
EN / IEC 60034-7
Terminal designations and direction of rotation
EN / IEC 60034-8
Noise emission
EN / IEC 60034-9
Starting characteristics of rotating electrical machines
EN / IEC 60034-12
Vibration severity grades
EN / IEC 60034-14
Efficiency classification of three-phase squirrel-cage induction motors
EN / IEC 60034-30
IEC standard voltages
IEC 60038
Supplementary regulations for explosion-proof machines
Table 3- 2 Regulations applied for explosion-protected machines
Feature
Standard
Electrical equipment for hazardous gas atmospheres, Part 0: General requirements
EN / IEC 60079-0
Electrical equipment for hazardous gas atmospheres, Part 1: Flameproof enclosure "d"
EN / IEC 60079-1
Electrical equipment for hazardous gas atmospheres, Part 7: Increased safety "e"
EN / IEC 60079-7
Electrical equipment for hazardous gas atmospheres, Part 14: Electric installations for
endangered atmospheres (except underground excavation)
EN / IEC 60079-14
Electrical equipment for hazardous gas atmospheres, Part 15: Type of protection "n"
EN / IEC 60079-15
Electrical equipment for hazardous gas atmospheres, Part 19: Repairs and overhauls
EN / IEC 60079-19
Potentially explosive atmosphere - Part 31: Device dust explosion protection by enclosure "t"
EN / IEC 60079-31
Electrical equipment for use in the presence of combustible dust - Part 17: Inspection and
maintenance of electrical systems in hazardous areas (except underground excavation)
EN / IEC 60079-17
Directive on the approximation of the laws of the Member States concerning equipment and
protective systems intended for use in hazardous areas.
RL94/9/EC

Description
3.3 Installation
Low-voltage motors
Operating Instructions, 05/2014, 5 610 00000 02 000 19
3.3.3
Cooling and ventilation
3.3.3.1
General
The machines of this series are three-phase asynchronous machines with a closed primary
(internal) cooling circuit and an open secondary cooling circuit (surface cooling). The surface
cooling varies depending on the version.
3.3.3.2
Machines with a fan
Self-ventilation (standard): Cooling IC 411 in accordance with EN / IEC 60034-6
Located at the ND end of the stator housing is an air intake cowl that guides the external air
on its way to the motor. The external air is drawn in through openings in the air intake cowl
and flows axially across the outer cooling ribs of the motor frame. The fan wheel for the
external flow of cooling air is attached to the machine shaft.
The fan wheels are bidirectional.
Check the cooling effect below rated speed in the case of frequent switching or braking – or
if the speed is controlled continually below the rated speed.
Note explosion-protected machines
Machines for use in Zone 21 and Zone 22 have a metal fan.

Description
3.3 Installation
Low-voltage motors
20 Operating Instructions, 05/2014, 5 610 00000 02 000
Forced ventilation (optional): Type of cooling IC 416 in accordance with EN / IEC 60034-6
WARNING
Risk of burning
Operating the machine without external fan results in overheating. This may result in
personal injury and material damage.
Never commission the machine without an external fan.
Cooling that does not depend on the speed is achieved by means of a separately driven fan
wheel (forced ventilation). Forced ventilation does not depend on the operating state of the
machine.
The fan wheel for the external flow of cooling air is powered by an independent module and
is enclosed by the fan cover.
3.3.3.3
Machines without a fan (optional)
Surface cooling by free convection: Cooling IC 410 in accordance with EN / IEC 60034-6
Figure 3-2 IC410