SEW-Eurodrive DR63 Series Installation and operating instructions

Drive Technology \ Drive Automation \ System Integration \ Services
Addendum to the Operating Instructions
Explosion-Proof AC Motors DR63/eDR63,
DVE250, DVE280
Edition 11/2012 19494815 / EN

SEW-EURODRIVE—Driving the world

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 3
Contents
Contents
1 General Information ............................................................................................ 5
1.1 How to use this documentation................................................................... 5
1.2 Structure of the safety notes ....................................................................... 5
1.3 Rights to claim under warranty ................................................................... 6
1.4 Exclusion of liability..................................................................................... 6
1.5 Copyright..................................................................................................... 6
1.6 Product names and trademarks.................................................................. 6
2 Safety Notes ........................................................................................................ 7
2.1 Preliminary information ............................................................................... 7
2.2 General information .................................................................................... 7
2.3 Target group ............................................................................................... 8
2.4 Designated use ........................................................................................... 8
2.5 Other applicable documentation ................................................................. 9
2.6 Transport/storage........................................................................................ 9
2.7 Installation .................................................................................................. 9
2.8 Electrical connection ................................................................................. 10
2.9 Startup/operation ...................................................................................... 10
3 Motor Structure ................................................................................................. 11
3.1 Basic structure of the motors .................................................................... 11
3.2 Nameplate, type designation .................................................................... 13
3.3 Accessory equipment................................................................................ 14
4 Mechanical Installation..................................................................................... 16
4.1 Before you start......................................................................................... 16
4.2 Extended storage of motors...................................................................... 17
4.3 Motor installation notes ............................................................................. 18
4.4 Installation tolerances ............................................................................... 20
4.5 Assembling the input elements ................................................................. 20
4.6 Turning the terminal box ........................................................................... 20
4.7 Painting ..................................................................................................... 22
5 Electrical Installation ........................................................................................ 23
5.1 Additional regulations................................................................................ 23
5.2 Wiring diagrams and terminal assignment diagrams ................................ 23
5.3 Checking cross sections ........................................................................... 23
5.4 Cable entries............................................................................................. 23
5.5 Equipotential bonding ............................................................................... 24
5.6 Wiring notes .............................................................................................. 24
5.7 Special aspects for operation with frequency inverter .............................. 25
5.8 Improving the grounding (EMC)................................................................ 25
5.9 Special aspects in switching operation ..................................................... 25
5.10 Ambient conditions during operation......................................................... 26
5.11 Notes regarding the connection of the motor............................................ 27

4Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
Contents
5.12 Connecting category 2G and 2GD motors ................................................ 27
5.13 Connecting category 3G and 3GD motors ................................................ 28
5.14 Motors of category 2G, 2GD, 3D and 3GD ............................................... 31
5.15 Accessory equipment................................................................................ 34
6 Duty Types and Limit Values ........................................................................... 36
6.1 Permitted duty types ................................................................................. 36
6.2 Use............................................................................................................ 38
6.3 Safe operation of motors in category 3 ..................................................... 39
6.4 Soft-start units........................................................................................... 41
7 Startup................................................................................................................ 42
7.1 Before startup ........................................................................................... 42
7.2 During startup ........................................................................................... 43
7.3 Parameter setting: Frequency inverters for category 3 motors................. 43
7.4 Changing the blocking direction for motors with backstop........................ 45
8 Inspection / Maintenance ................................................................................. 47
8.1 Inspection and maintenance intervals....................................................... 48
8.2 Change the adapter plate ......................................................................... 49
8.3 Greasing the backstop .............................................................................. 49
8.4 Mounting a VE forced cooling fan ............................................................. 50
9 Technical Data................................................................................................... 51
9.1 Maximum permitted overhung loads......................................................... 51
9.2 Permitted ball bearing types ..................................................................... 52
9.3 Tightening torques .................................................................................... 52
10 Malfunctions ...................................................................................................... 53
10.1 Malfunctions of the motor.......................................................................... 53
10.2 Malfunctions during operation with a frequency inverter........................... 54
10.3 Customer service ...................................................................................... 54
11 Declarations of Conformity .............................................................................. 55
11.1 eDR.63 AC motors in category 2GD ......................................................... 56
11.2 AC motors DR.63 in category 3GD........................................................... 57
11.3 AC motors DVE250/280 in category 3GD................................................. 58
Index................................................................................................................... 59

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 5
1
How to use this documentation
General Information
Explosion-Proof AC Motors DR63/eDR63, DVE250/280
1 General Information
1.1 How to use this documentation
The documentation is an integral part of the product and contains important information
on operation and service. The documentation is written for all employees who assemble,
install, start up, and service this product.
The documentation must be accessible and legible. Make sure that persons responsible
for the system and its operation, as well as persons who work independently on the unit,
have read through the documentation carefully and understood it. If you are unclear
about any of the information in this documentation, or if you require further information,
contact SEW-EURODRIVE.
Use this addendum to the operating instructions only together with the operating instruc-
tions "Explosion-Proof AC Motors, Asynchronous Servomotors" and "Explosion-Proof
AC Motors EDR.71 – 225".
1.2 Structure of the safety notes
1.2.1 Meaning of the signal words
The following table shows the grading and meaning of the signal words for safety notes,
notes on potential risks of damage to property, and other notes.
1.2.2 Structure of the section-related safety notes
Section-related safety notes do not apply to a specific action, but to several actions per-
taining to one subject. The used symbols indicate either a general or a specific hazard.
This is the formal structure of a section-related safety note:
Signal word Meaning Consequences if disregarded
DANGER Imminent danger Severe or fatal injuries
WARNING Possible dangerous situation Severe or fatal injuries
CAUTION Possible dangerous situation Minor injuries
NOTICE Possible damage to property Damage to the drive system or its
environment
NOTE ON
EXPLOSION
PROTECTION
Important note on explosion
protection
Suspension of explosion protection and
resulting hazards
INFORMATION Useful information or tip:
Simplifies the handling of the
drive system.
SIGNAL WORD
Nature and source of danger.
Possible consequence(s) if disregarded.
• Measure(s) to avoid the danger.

6Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
1Rights to claim under warranty
General Information
1.2.3 Structure of the embedded safety notes
Embedded safety notes are directly integrated in the instructions just before the descrip-
tion of the dangerous action.
This is the formal structure of an embedded safety note:
•SIGNAL WORD Nature and source of danger.
Possible consequence(s) if disregarded.
– Measure(s) to avoid the danger.
1.3 Rights to claim under warranty
A requirement of fault-free operation and fulfillment of any rights to claim under limited
warranty is that you adhere to the information in the documentation. Read the documen-
tation before you start working with the unit!
1.4 Exclusion of liability
Compliance with the information contained in the documentation is essential to ensure
safe operation of the explosion-proof AC motors DR63/eDR63 and DVE250/280and to
achieve the specified product characteristics and performance requirements. SEW-
EURODRIVE assumes no liability for injury to persons or damage to equipment or prop-
erty resulting from non-observance of the documentation. In such cases, any liability for
defects is excluded.
1.5 Copyright
© 2012 - SEW-EURODRIVE. All rights reserved.
Copyright law prohibits the unauthorized duplication, modification, distribution, and use
of this document, in whole or in part.
1.6 Product names and trademarks
The brands and product names contained within this publication are trademarks or
registered trademarks of the titleholders.

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 7
2
Preliminary information
Safety Notes
2 Safety Notes
The following basic safety notes must be read carefully to prevent injury to persons and
damage to property. The operator must ensure that the basic safety notes are read and
adhered to. Make sure that persons responsible for the system and its operation, as well
as persons who work independently on the unit, have read through the operating
instructions carefully and understood them. If you are unclear about any of the informa-
tion in this documentation or if you require further information, please contact SEW-
EURODRIVE.
2.1 Preliminary information
The following safety notes are primarily concerned with the use of the following compo-
nents: Explosion-proof AC motors DR63/eDR63 and DVE250/280. If you use gear-
motors, also refer to the safety notes in the corresponding operating instructions for:
• Motors
• Gear units
Also observe the supplementary safety notes in the individual sections of this documen-
tation.
2.2 General information
This documentation provides additional information.
WARNING
Danger of fatal injury or risk of injury during the operation of motors or gearmotors
caused by live, bare (in the event of open connectors/terminal boxes) and movable or
rotating parts.
Risk of burns caused by hot surfaces
Severe or fatal injuries
• All work related to transport, storage, installation, assembly, connection, startup,
maintenance and repair may only be carried out by qualified personnel.
• For transport, storage, installation, assembly, connection, startup, maintenance
and repair it is important that you adhere to the information in the following docu-
ments:
– Warning and safety signs on the motor/gearmotor
– All the project planning documents, startup instructions and wiring diagrams re-
lated to the drive
– System-specific regulations and requirements
– National/regional regulations governing the safety and prevention of accidents
• Never install damaged products.
• Never operate or energize the unit without the necessary protection covers or
housing.
• Use the unit only for its intended purpose.
• Make sure the unit is installed and operated properly.
INFORMATION
In the event of damage caused by transport, submit a complaint to the shipping com-
pany immediately.

8Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
2Target group
Safety Notes
2.3 Target group
Any mechanical work may only be performed by adequately qualified personnel. Quali-
fied personnel in the context of this documentation are persons familiar with the design,
mechanical installation, troubleshooting and servicing of the product who possess the
following qualifications:
• Training in mechanical engineering, e.g. as a mechanic or mechatronics technician
(final examinations must have been passed).
• They are familiar with these operating instructions.
Any electronic work may only be performed by adequately qualified electricians. Quali-
fied electricians in the context of this documentation are persons familiar with electrical
installation, startup, troubleshooting and servicing of the product who possess the
following qualifications:
• Training in electrical engineering, e.g. as an electrician, electronics or mechatronics
technician (final examinations must have been passed).
• They are familiar with these operating instructions.
All work in further areas of transportation, storage, operation and waste disposal must
only be carried out by persons who are trained appropriately.
All qualified personnel must wear appropriate protective clothing.
2.4 Designated use
The explosion-proof electric motors are intended for industrial systems.
When installed in machines, startup of the motors (i.e. start of designated operation) is
prohibited until it is determined that the machine meets the requirements stipulated in
EC Directive 94/9/EC (ATEX Directive).
Air-cooled types are dimensioned for ambient temperatures of -20 °C to +40 °C and in-
stallation altitudes ≤1000 m above sea level. Note that information on the nameplate
may differ. The ambient conditions must comply with all the specifications on the name-
plate.
NOTES ON EXPLOSION PROTECTION
• The motor is only allowed to be operated under the conditions described in the
"Startup" section.
• A motor may only be operated with the frequency inverter when the requirements
of the prototype test certificates and/or this documentation and the information on
the nameplate of the motor, if available, are fulfilled.
• There may be no aggressive substances in the vicinity that could damage the paint
and seals.
• The motors must not be operated in areas/applications that cause strong electrical
charge on the motor housing, e.g. as a fan motor in a dust-transporting tube as this
may cause electrostatic charge of the coated surfaces.

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 9
2
Other applicable documentation
Safety Notes
2.5 Other applicable documentation
The following publications and documents have to be observed as well:
• Wiring diagrams provided with the motor
• Operating instructions of the frequency inverter for motors powered by inverters
• Operating instructions "Explosion-Proof Gear Units R..7, F..7, K..7, S..7 Series,
SPIROPLAN®W" for gearmotors
• Operating instructions "Explosion-Proof VARIBLOC®Variable-Speed Gear Units
and Accessories" / "Explosion-Proof VARIMOT®Variable-Speed Gear Units and
Accessories"
• Operating instructions of installed options, if applicable
• "Explosion-Proof AC Motors" catalog and/or
• "Explosion-proof drives" catalog
The complete range of technical documentation is available at our home page:
www.sew-eurodrive.com
2.6 Transport/storage
Inspect the shipment for any damage that may have occurred in transit as soon as you
receive the delivery. Inform the shipping company immediately. It may be necessary to
preclude startup.
Tighten the eyebolts securely. They are designed to carry only the weight of the
motor/gearmotor; do not attach any additional loads.
The built-in lifting eyebolts comply with DIN 580. Always observe the loads and regula-
tions listed in this standard. If the gearmotor is equipped with two eyebolts, then both
should be used for transportation. In this case, the tension force vector of the slings must
not exceed a 45° angle according to DIN 580.
Use suitable, sufficiently rated handling equipment if required. Reattach these in the
case of further transportation.
Store the motor/gearmotor in a dry, dust-free environment if it is not to be installed
straight away. You must not store the motor/gearmotor outdoors or on the fan guard.
The motor/gearmotor can be stored for up to 9 months without requiring any special
measures before startup.
2.7 Installation
Make sure that the supports are even, the foot and flange mounting is correct and if
there is direct coupling, align with precision. Resonances between the rotational fre-
quency and the double network frequency caused by the structure are to be avoided.
Release the brake (if installed), turn rotor manually, check for unusual grinding noise.
Check the direction of rotation in decoupled status.
Only install or remove belt pulleys and couplings using suitable devices (heat up) and
cover with a touch guard. Avoid improper belt tension.
Make the pipe connections that may eventually be required. Mounting positions with
shaft ends pointing upwards should be equipped with a cover to prevent foreign objects
from falling into the fan. Ensure that ventilation openings are not obstructed and that
used air, including air from adjacent units, cannot be drawn in again straight away.

10 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
2Electrical connection
Safety Notes
Observe the notes in the "Mechanical Installation" section.
2.8 Electrical connection
All work may only be carried out by qualified personnel. During work, the low-voltage
machine must be at standstill, enabled, and safeguarded against accidental restart. This
also applies to auxiliary circuits (e.g. anti-condensation heating or forced cooling fan).
Check that the motor is de-energized!
Exceeding the tolerances in EN 60034-1 (VDE 0530, part 1) – voltage +5 %, frequency
+2 %, curve shape, symmetry – increases the heating and influences electromagnetic
compatibility. Also observe DIN IEC 60364 and EN 50110 (and, if applicable, other na-
tional regulations, such as DIN VDE 0105 for Germany).
In addition to the generally applicable installation regulations for low-voltage equipment,
it is also necessary to comply with the special regulations for setting up electrical ma-
chinery in potentially explosive atmospheres (operating safety regulations in Germany:
EN 60079-14; EN 61241-14 and system-specific regulations).
Observe the wiring information and differing data on the nameplate as well as the wiring
diagram in the terminal box.
The connection should be a continuous secure electrical connection (no protruding wire
ends); use the cable end equipment intended for this purpose. Establish a secure pro-
tective earth connection. When the motor is connected, the distances between live and
conductive parts must not be shorter than the minimum values according to DIN EN /
IEC 60079-7 and -15 and national regulations. The minimum values according to the
respective standards must be observed, see the following table:
The terminal box must be free of foreign objects, dirt and humidity. Unused cable entry
openings and the box itself must be closed so that they are dust and water proof. Secure
keys for test mode without output elements. Assure yourself of the flawless operability
prior to starting up low-voltage machines.
Observe the notes in the "Electrical Installation" chapter.
2.9 Startup/operation
Whenever changes to normal operation occur, such as increased temperatures, noise,
vibrations, etc., try to determine the cause. Consult the manufacturer if required. Never
deactivate protection devices, even in test mode. Switch off the motor in case of doubt.
Regularly clean air ducts in dusty or dirty environments.
Nominal voltage VNDistance for motors in
category 3
(DIN EN / IEC 60079-15)
Distance for motors in
category 2
(DIN EN / IEC 60079-7)
≤500 V 5 mm 8 mm
>500Vto ≤690 V 5.5 mm 10 mm

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 11
3
Basic structure of the motors
Motor Structure
3 Motor Structure
3.1 Basic structure of the motors
The following figure illustrates the structure of a DR63/eDR.63 motor:
INFORMATION
The following figures are block diagrams. They help you assign components to the
spare parts list. Deviations are possible depending on the motor size and version.
[1] Rotor [32] Retaining ring [113] Pan head screw [143] Adapter plate
[2] Retaining ring [35] Fan guard [114] Serrated lock washer [144] Screw
[3] Key [36] Fan [115] Terminal [216] Hex nut
[7] Flanged endshield [41] Shim [116] Terminal clip [230] Hex nut
[9] Screw plug [42] B-side endshield [117] Hex head screw [572] Gasket
[10] Retaining ring [44] Grooved ball bearing [118] Lock washer [823] Lock washer
[11] Grooved ball bearing [100] Hex nut [123] Hex head screw [829] Screw
[12] Retaining ring [101] Lock washer [126] Terminal clip
[13] Cap screw [103] Stud [129] Screw plug
[16] Stator [104] Supporting ring [131] Gasket for cover
[19] Screw [106] Oil seal [132] Terminal box cover
[22] Hex head screw [107] Oil flinger [134] Screw plug
[30] Oil seal [108] Nameplate [139] Hex head screw
[31] Key [109] Grooved pin [140] Lock washer
113114
116 117
118
3510 9
143 36115
144 30
32
2
13
7
11 12 131
132 16
41
123
572
829
42
44
13
101
100
104
103 31
22
19
108
109
106
107
4321
TF
TF
823
126
140
139
230
216
129
134

12 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
3Basic structure of the motors
Motor Structure
The following figure illustrates the structure of the DVE250/280 motor:
1 Rotor, complete 35 Fan guard 128 Grounding terminal
3 Key 36 Fan 129 Screw plug
7 Flanged endshield 42 B-side endshield 134 Screw plug
9 Screw plug 44 Grooved ball bearing 160 Gasket
11 Grooved ball bearing 105 Spring washer 262 Terminal
16 Stator, complete 108 Nameplate 615 Terminal
30 Oil seal 111 Gasket 616 Terminal
32 Retaining ring 127 Grounding terminal 1213 Terminal board, complete
44 3530
32
36
1691 7
105
11
108
342 131
134
129
128
127
111
160
1213
615
262
616
XX

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 13
3
Nameplate, type designation
Motor Structure
3.2 Nameplate, type designation
3.2.1 Nameplate
The following figure shows an example nameplate of a DVE motor in category 3GD:
3.2.2 Type designations
The following diagram shows a type designation example:
2439213579
The marks on the upper edge of the nameplate are only present when the motor has been certified accord-
ingly or when it includes the relevant components.
6306-2Z-J-C3
6205-2Z-J-C3
EDRE90M4/2GD 0102
82,5
01.1151928301.0001.11 PTB 10 ATEX 1234 / 01
50 1430 220-240 / 380-420Y 6,9
16
0,77
3,48
1,5
PTB 10 ATEX 1234 / 02 86,4
II2G Ex e IICT3 Gb II2D Ex tb IIIC T120°C Db
Kundenartikel-Nr. 13A47B911
B3 65 155 (F)
19 -20..+40 130 (B) 2011
e DR63 M 4 /2GD /TF
Motor protection option:
• TF temperature sensor
• Temperature detection KY
Category for explosion protection:
• 2G, 2GD, 3D, or 3GD
Number of poles:
•4,6
Motor frame length:
• S: short
•M:medium
•L:long
•
Motor size:
• 63, 250, 280
Motor series with code letter:
• E: Energy efficient motor variant IE2 (DVE250/280)
Code letter for category 2
•eDR63

14 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
3Accessory equipment
Motor Structure
3.3 Accessory equipment
3.3.1 AC motor series
The following table shows the types of AC motors:
3.3.2 Mechanical attachments
The following table shows possible mechanical additions:
3.3.3 Temperature sensor / temperature detection
The following table shows the thermal protection options:
3.3.4 Connection
The following table shows the connection variants:
3.3.5 Ventilation
The following table shows possible ventilation variants:
Designation Category
eDR.., DR..
/2G, /2GD,
/3D, /3GD
ATEX motor
DVE.. ATEX energy-efficient motor, High Efficiency IE2
63, 250, 280 Motor sizes
S – L
Lengths:
S = short / M = medium / L = long
LC = Rotors with copper cage
4, 6 Number of poles
Designation Category Option
/RS /3GD Backstop (line-powered only)
Designation Category Option
/TF /2G, /2GD,
/3D, /3GD
Temperature sensor (PTC resistor)
/KY One KTY84 – 130 sensor
Designation Category Included in the scope of delivery
/2G, /2GD,
/3D, /3GD
Cage clamp (DT14): eDR63, DR63
Terminal board (DT13): DVE250/280
Designation Category Option
/VE /3D, /3GD Forced cooling fan for motors according to 94/9/EC, category 3
(gas / dust): DVE250/280
/AL /2G, /2GD,
/3D, /3GD
Metal fan: eDR63, DR63
/C Protection canopy for the fan guard

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 15
3
Accessory equipment
Motor Structure
3.3.6 Explosion-proof motors
The following table shows the possible explosion protection categories:
3.3.7 Other additional features
The following table shows an additional feature:
Designation Option
/II2G Motors according to Directive 94/9/EC, category 2 (gas)
/II2GD Motors according to Directive 94/9/EC, category 2 (gas/dust)
/II3D Motors according to Directive 94/9/EC, category 3 (dust)
/II3GD Motors according to Directive 94/9/EC, category 3 (gas/dust)
Designation Category Option
/2W /2G, /2GD,
/3D, /3GD Second shaft end on the motor

16 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
4Before you start
Mechanical Installation
4 Mechanical Installation
4.1 Before you start
Install the drive only if the following conditions are met:
• The data on the nameplate of the drive corresponds with the voltage supply system
or with the output voltage of the frequency inverter
• The drive is undamaged (no damage caused by transport or storage)
• All transport locks have been removed.
• You are certain that the following requirements have been met:
– Ambient temperature between -20 ˚C and +40 °C.
Note that the temperature range of the gear unit may also be restricted (see gear
unit operating instructions).
Any differing specifications on the nameplate must be observed. The ambient
conditions must comply with all the specifications on the nameplate.
– No oils, acids, gases, vapors, dusts, radiations, etc.
– Max. installation altitude 1000 m above sea level.
Observe chapter "Electrical Installation" > "Ambient conditions during operation"
> "Installation altitude".
– Note the restrictions for encoders.
– Special design: The drive is designed in accordance with the ambient conditions
The above mentioned information refers to standard orders. The conditions might be dif-
ferent when you order drives other than the standard. Refer to the order confirmation for
differing conditions.
INFORMATION
It is essential that you observe the safety notes in chapter 2 for mechanical installation.
NOTICE
The mounting position for installation must correspond with the specifications on the
nameplate.

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 17
4
Extended storage of motors
Mechanical Installation
4.2 Extended storage of motors
• Note that the service life of the lubricant in the ball bearings is reduced by 10% per
year after the first year of storage.
• Before startup, you should re-lubricate the lubrication devices on motors that have
been in storage for longer than 5 years. Observe the information on the motor lubri-
cant plate.
• Check whether the motor has absorbed moisture as a result of being stored for a long
time. Measure the insulation resistance for this purpose (measuring voltage 500 V).
The insulation resistance (see following figure) varies greatly depending on the
temperature. The motor must be dried if the insulation resistance is not adequate.
4.2.1 Drying the motor
Heat the motor
• with warm air, or
• using an isolation transformer
– Connect the windings in series (see following figures)
– Auxiliary AC voltage supply max. 10% of the rated voltage with max. 20% of the
rated current
Connection with wiring diagram R13:
173323019
100
10
1
0,1 020 40 60 80
[˚C]
[M ]
2336250251
[1] Transformer
[1]

18 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
4Motor installation notes
Mechanical Installation
The drying process is finished when the minimum insulation resistance has been ex-
ceeded.
In the terminal box, make sure that:
• The inside is clean and dry
• The connections and fixing parts are free from corrosion
• The gasket and sealing surfaces are in good condition
• The cable glands are tight, otherwise clean or replace them
4.3 Motor installation notes
• Motor shaft ends must be thoroughly cleaned of anti-corrosion agents, contamination
or similar (use a commercially available solvent). Do not allow the solvent to pene-
trate the bearings or shaft seals – this could damage the material.
• Mount the gearmotor only on a level, vibration-free and torsionally rigid support struc-
ture.
• Make sure the customer's counter-bearing is unobstructed and can move freely.
• Align the motor and the driven machine carefully in order to prevent the output shaft
from being exposed to unacceptable strain. Observe the permitted overhung and
axial forces.
• Do not jolt or hammer the shaft end.
CAUTION
Sharp edges due to open keyway.
Minor injuries.
• Insert key in keyway.
• Pull protective sleeve over shaft.
CAUTION
Improper mounting may result in damage to the motor.
Possible damage to property
• Observe the following notes.
NOTICE
The mounting position for installation must correspond with the specifications on the
nameplate.

Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280 19
4
Motor installation notes
Mechanical Installation
• Make sure that there is sufficient clearance around the motor/brakemotor to provide
for adequate cooling, and that the motor does not draw in warm air from other units.
Observe the following minimum clearance:
• Balance components for subsequent mounting on the shaft with a half key (motor
shafts are balanced with a half key).
• If you have used the hand lever of the self-reengaging manual brake release during
startup, you must remove the lever again for regular operation. A bracket is provided
for storing the lever on the outside of the motor housing.
4.3.1 Installation in damp locations or outdoors
• Use suitable cable glands for the incoming cable (use reducing adapters if neces-
sary) according to the installation instructions.
• If possible, arrange the terminal box in such a way that the cable entries are pointing
downwards.
• Seal the cable entry properly.
• Thoroughly clean the sealing surfaces of the terminal box and the terminal box cover
prior to reassembly. Replace any brittle seals!
• If required, touch up the corrosion protection (especially at the eyebolts).
• Check the degree of protection.
• Protect the shaft against corrosion using a suitable anti-corrosion agent.
Motor type h in mm
eDR63, DR63 15
DVE250 40
DVE280
h
INFORMATION
• If using belt pulleys:
– Only use belts that do not build up an electrostatic charge.
– Do not exceed the maximum permitted overhung load; for motors without gear
units, see chapter "Overhung loads (page 51)".
• Motors in vertical mounting position (e.g. M4/V1) are equipped with a canopy /C as
standard.
On request, the motor can be delivered without canopy. In this case, you have to
install a cover when you install the drive in the plant/machine in order to prevent
objects from falling into the ventilation openings. Observe the requirements accord-
ing to EN / IEC 60079-0 and EN / IEC 60079-7. This cover must not obstruct the
cooling air supply.
• In mounting positions with the motor output shaft pointing upwards (e.g. M2/V3), a
suitable cover must prevent small objects from falling through the fan guard, see
also EN / IEC 60079-0. This cover must not obstruct the cooling air supply.

20 Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
4Installation tolerances
Mechanical Installation
4.4 Installation tolerances
4.5 Assembling the input elements
Input elements that are mounted on the motor shaft end, e.g. pinions, must be warmed
up prior to assembly in order to prevent damages to the encoder of stand-alone motors.
4.6 Turning the terminal box
4.6.1 Terminal box with terminal board and anti-twist frame
The following figure shows a terminal box with anti-twist frame:
Shaft end Flanges
Diameter tolerance according to EN 50347
• ISO j6 with Ø ≤28 mm
• ISO k6 with Ø ≥38 mm up to ≤48 mm
• ISO m6 at Ø ≥55 mm
• Center bore in accordance with DIN 332, shape
DR..
Centering shoulder tolerance in accordance with
EN 50347
• ISO j6 with Ø ≤250 mm
• ISO h6 with Ø ≥300 mm
K1M6 / K1M8 in with aluminum or gray cast
design
K1M12S made of gray cast
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