SEW-Eurodrive DRS 315 User manual

Drive Technology \ Drive Automation \ System Integration \ Services
Explosion-Proof
AC Motors – DRS/DRE/DRP 315
Operating Instructions
Edition 10/2007
11631015 / EN

SEW-EURODRIVE – Driving the world

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 3
Contents
Contents
1 General Information ............................................................................................ 5
1.1 Structure of the safety notes ....................................................................... 5
1.2 Rights to claim under limited warranty ........................................................ 6
1.3 Exclusion of liability..................................................................................... 6
2 Safety Notes ........................................................................................................ 7
2.1 Preliminary information ............................................................................... 7
2.2 General information .................................................................................... 7
2.3 Designated use ........................................................................................... 8
2.4 Other applicable documentation ................................................................. 8
2.5 Transport..................................................................................................... 9
2.6 Installation .................................................................................................. 9
2.7 Electrical connection ................................................................................. 10
2.8 Operation .................................................................................................. 11
2.9 Disposal .................................................................................................... 11
3 Motor Design ..................................................................................................... 12
3.1 Basic design of the DR.315 ...................................................................... 12
3.2 Nameplate, unit designation ..................................................................... 13
4 Mechanical Installation..................................................................................... 14
4.1 Before you start......................................................................................... 14
4.2 Mechanical installation.............................................................................. 14
5 Electrical Installation ........................................................................................ 17
5.1 General information .................................................................................. 17
5.2 Using wiring diagrams and terminal assignment diagrams....................... 18
5.3 Wiring instructions..................................................................................... 18
5.4 Improving the grounding (EMC)................................................................ 19
5.5 Environmental conditions during operation............................................... 20
5.6 Motors in category 3GD ............................................................................ 21
6 Startup................................................................................................................ 26
6.1 Prerequisites for startup............................................................................ 26
7 Inspection/Maintenance ................................................................................... 27
7.1 Inspection and maintenance intervals....................................................... 28
7.2 Bearing lubrication ................................................................................... 29
7.3 Reinforced bearing.................................................................................... 30
7.4 Inspection and maintenance work on the motor DR315 ........................... 31
8 Technical Data................................................................................................... 34
8.1 Permitted anti-friction bearing types ......................................................... 34
8.2 Lubricant table for anti-friction bearings of SEW motors........................... 34
8.3 Order information for lubricants and anti-corrosion agents....................... 34

4Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
Contents
9 Appendix............................................................................................................ 35
9.1 Wiring diagrams ........................................................................................ 35
9.2 Declaration of Conformity ......................................................................... 37
10 Malfunctions ...................................................................................................... 38
10.1 Motor malfunctions.................................................................................... 38
10.2 Customer service ...................................................................................... 39
11 Address List ...................................................................................................... 40
Index................................................................................................................... 49

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 5
1
Structure of the safety notes
General Information
Explosion-Proof AC Motors – DRS/DRE/DRP 315
1 General Information
1.1 Structure of the safety notes
The safety notes in these operating instructions are structured as follows:
Symbol SIGNAL WORD
Nature and source of hazard.
Possible consequence(s) if disregarded.
• Measure(s) to avoid the hazard.
Symbol Signal word Meaning Consequences if disre-
garded
Example:
General hazard
Specific hazard,
e.g. electric shock
HAZARD! Imminent hazard Severe or fatal injuries
WARNING! Possible hazardous situation Severe or fatal injuries
CAUTION! Possible hazardous situation Minor injuries
NOTE ON EXPLO-
SION PROTECTION
Important note on explosion pro-
tection
Suspension of explosion protection and
resulting dangers
STOP! Possible damage to property Damage to the drive system or its environ-
ment
NOTE Useful information or tip.
Simplifies handling of the drive
system.

6Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
1Rights to claim under limited warranty
General Information
1.2 Rights to claim under limited warranty
Adhering to the operating instructions is a prerequisite for fault-free operation and the
fulfillment of any right to claim under warranty. Read the operating instructions before
you start working with the unit.
Make sure that the operating instructions are available to persons responsible for the
system and its operation as well as to persons who work independently on the unit. You
must also ensure that the documentation is legible.
1.3 Exclusion of liability
You must comply with the information contained in these operating instructions to en-
sure safe operation of the explosion-proof electric motors and to achieve the specified
product characteristics and performance requirements. SEW-EURODRIVE assumes no
liability for injury to persons or damage to equipment or property resulting from non-ob-
servance of these operating instructions. In such cases, any liability for defects is ex-
cluded.

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 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 make sure that the basic safety notes are read
and observed. Make sure that persons responsible for the plant 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, please contact SEW-EURODRIVE.
2.1 Preliminary information
The following safety notes are concerned with the use of motors. If using gearmotors,
also refer to the safety notes for gear units in the corresponding operating instructions.
Please also consider the supplementary safety notes in the individual sections of
these operating instructions.
2.2 General information
Never install damaged products or take them into operation. Submit a complaint to the
shipping company immediately in the event of damage.
Low-voltage machines have dangerous, live and rotating parts as well as hot surfaces.
All work related to transportation, putting into storage, setup/mounting, connection, star-
tup, maintenance and repair may only be carried out by qualified personnel observing
• The relevant detailed operating instruction(s) and wiring diagrams
• The warning and safety signs on the motor/gearmotor
• The specific regulations and requirements for the system
• The national/regional regulations governing safety and the prevention of accidents
Removing covers without authorization, improper use as well as incorrect installation or
operation may result in severe injuries to persons or damage to machinery.
Consult the documentation for additional information.

8Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
2Designated use
Safety Notes
2.3 Designated use
The electric motors are intended for industrial systems. They fulfill the applicable stan-
dards and regulations:
• Low Voltage Directive 73/23/EEC
• Directive 94/9/EC
• EN 61241-0 Electrical apparatus for use in atmospheres containing combustible
dust: General requirements
• EN 61241-1 Electrical apparatus for use in atmospheres containing combustible
dust: Protection through housing "tD"
• EN 60079-0 electrical apparatus for potentially explosive atmospheres: General
requirements
• EN 60079-15 electrical apparatus for potentially explosive atmospheres: Design,
testing and designation of electric equipment in protection type "n".
• EN 60034 Rotating electrical machines
Technical data and information on the permitted conditions are given on the nameplate
and in the documentation; they have to be observed under all circumstances.
2.4 Other applicable documentation
The following publications and documents have to be observed as well:
• Operating instructions "Explosion-Proof Gear Units R..7, F..7, K..7, S..7 Series,
Spiroplan®W" for gearmotors
• Operating instructions of the frequency inverter for motors powered by inverters
• Operating instructions of installed options, if applicable
• Corresponding wiring diagrams

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 9
2
Transport
Safety Notes
2.5 Transport
Immediately upon receipt, inspect the shipment for any damage that may have occurred
during transportation. Inform the shipping company immediately. It may be necessary to
preclude startup.
Tighten the eyebolts securely. They are only intended for the weight of the motor/gear-
motor; 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 of
these 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 when necessary. Remove any trans-
portation fixtures prior to startup. Reattach these in the case of further transportation.
When storing low voltage machines, make sure to keep it in a dry, dust-free environment
with minimum vibration (veff ≤ 0.2 mm/s) (damage to stalled bearings). Measure the in-
sulation resistance prior to startup. Dry the winding if values ≤ 1 kΩper volt of the rated
voltage.
2.6 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.
Turn the rotor manually and listen for unusual noises. 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.
Observe the notes in section "Mechanical Installation" (see page 14)!

10 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
2Electrical connection
Safety Notes
2.7 Electrical connection
All work may only be carried out by qualified personnel. During work, the low-voltage
machine must be on standstill, enabled, and safeguarded against an accidental restart.
This also applies to auxiliary circuits (e.g. anti-condensation heating).
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. Observe nameplate data and the wiring diagram in the terminal box.
Pay attention to the wiring information and different data on the nameplate, as well as
observing the wiring diagram.
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 to non-insulated
and live parts must not be shorter than the minimum values according to EN 60079-15
and national regulations. With low voltage, the distances should be no shorter than the
following values, in compliance with EN 60079-15:
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 chapter "Electrical Installation" (see page 17)!
Rated voltage VNDistance
≤500 V 5 mm
≤690 V 5.5 mm

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 11
2
Operation
Safety Notes
2.8 Operation
Whenever changes occur in relation to normal operation, such as increased tempera-
tures, noise, oscillation, determine the cause and contact the manufacturer, if required.
Never bypass or disable protection devices, not even in test mode. If you are in doubt,
switch off the motor.
Regularly clean air ducts in dusty or dirty environments.
2.9 Disposal
Dispose of the motors in accordance with the material structure and the regulations in
force:
•Iron
•Aluminum
• Copper
• Plastics
• Electronic components

12 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
3Basic design of the DR.315
Motor Design
3 Motor Design
3.1 Basic design of the DR.315
The following figure illustrates the general structure. Its only purpose is to facilitate the
assignment of components to the spare parts lists. Deviations are possible depending
on the motor size and version!
351998603
[1]
[2]
[3]
[4]
[7]
[9]
[11]
[15]
[16]
[17]
[19]
[21]
[22]
[24]
[25]
[26]
[30]
Rotor
Circlip
Key
Key
Flange
Screw plug
Deep groove ball bearing
Machine screw
Stator
Hexagonal nut
Machine screw
Oil seal flange
Hex head bolt
Eyebolt
Machine screw
Sealing washer
Oil seal
[31]
[32]
[35]
[36]
[40]
[42]
[43]
[44]
[90]
[94]
[100]
[103]
[105]
[106]
[107]
[108]
[109]
Key
Circlip
Fan guard
Fan
Circlip
B-side endshield
Supporting ring
Deep groove ball bearing
Foot
Machine screw
Hexagonal nut
Stud
Spring washer
Oil seal
Oil flinger
Nameplate
Grooved pin
[111]
[112]
[113]
[115]
[116]
[117]
[118]
[119]
[123]
[129]
[131]
[132]
[134]
[139]
[140]
[151]
[219]
Gasket for lower part
Terminal box lower part
Machine screw
Terminal board
Serrated lock washer
Stud
Disc
Hex head bolt
Hex head bolt
Screw plug
Gasket for cover
Terminal box cover
Screw plug
Hex head bolt
Disc
Machine screw
Hex head bolt
[452]
[454]
[604]
[604]
[606]
[607]
[608]
[609]
[633]
[634]
[705]
[706]
[707]
[715]
[716]
Terminal strip
DIN rail
Lubrication ring
Relubrication ring
Greasing nipple
Greasing nipple
Oil seal flange
Hex head bolt
End bracket
End plate
Protective canopy
Spacer bolt
Hex head bolt
Hexagonal nut
Disc
[452]
[634]
[633]
[151]
[117]
[219]
[123]
[132]
[131]
[119]
[112]
[111]
[113]
[109]
[108]
[24]
[707]
[706]
[716]
[715]
[30]
[25] [35]
[26]
[19]
[22]
[107]
[106]
[250] [100]
[7]
[9]
[42]
[17]
[94]
[93]
[90]
[15]
[16]
[705]
[115] [134] [607]
[129]
[118]
[116]
[128]
[140]
[139]
[454]
[606] [604]
[609]
[11][608]
[105]
[3]
[31]
[21][44]
[43]
[40] [36]
[32]
[4]
[1]
[2]
[103]

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 13
3
Nameplate, unit designation
Motor Design
3.2 Nameplate, unit designation
3.2.1 Nameplate
Example: Ac motor
for category 3GD
3.2.2 Unit designation
Example: AC
motor category
3GD
514903819
DRS315S4 /3GD
01.3229562906.7901.03 0,86
1480 2007
132 50
400/690 235/136
B3 150(F)
-20 ... +40 65
930
76646 Bruchsal/Germany
Made in Germany
3~ IEC60034
1883208
II3G Ex nA II T3
II3D Ex tD A22 IP65 T140°C
Jahr
Nm
i
IM
Hz
Iso.Kl.
V
kW
r/min
kg
IP
V
BR
cos ϕ
°C
DRS 315 S4 / 3GD
Unit category
Motor length and number of poles
Motor size
DR series with code letter "S" standard
motor design

14 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
4Before you start
Mechanical Installation
4 Mechanical Installation
4.1 Before you start
The drive may only be installed when
• the specifications on the drive's nameplate and the output voltage of the frequency
inverter match the voltage supply system
• The drive is undamaged (no damage caused by transportation or storage).
• you are certain that the following requirements have been fulfilled:
– Ambient temperature between -20 °C and 40 °C 1)
– No oil, acid, gas, vapors, radiation, etc.
– Installation altitude max. 1000 m above sea level
– Note the restrictions for encoders
– Special versions: Drive configured in accordance with the ambient conditions
4.2 Mechanical installation
4.2.1 Preliminary work
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 penetrate the
bearings or shaft seals – this could damage the material.
Motors with rein-
forced bearing
NOTE
Do observe the safety notes in chapter 2 (see page 7) for when installing the unit!
1) Note that the temperature range of the gear unit may also be restricted (see gear unit operating instruc-
tions).
STOP
The mounting position for installation must correspond to the specifications on the
nameplate.
STOP
Motors with a reinforced bearing must not be operated without an overhung load. Oth-
erwise you risk damaging the bearings.

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 15
4
Mechanical installation
Mechanical Installation
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.
• You should re-lubricate the lubrication devices on motors that have been in storage
for longer than 5 years before startup. Observe the information on the motor lubricant
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.
Drying motor Heat the motor:
• with warm air or
• via isolation transformer
– Connect windings in series (see following figure)
– Auxiliary alternating current max. 10% of the rated voltage with max. 20% of the
rated current
The drying process is finished when the minimum insulation resistance has been ex-
ceeded.
Check the terminal box for the following:
• dry and clean inside
• Connection and fastening elements corrosion free
• Gasket and sealing surfaces OK
• Cable glands are sound, otherwise clean or replace them
173323019
100
10
1
0,1 020 40 60 80
[˚C]
[M ]
Trafo

16 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
4Mechanical installation
Mechanical Installation
4.2.2 Installing the motor
• The motor or gearmotor may only be mounted or installed in the specified mounting
position on a level, vibration-proof and torsionally rigid support structure.
• Clean the output shafts thoroughly to ensure they are free of anti-corrosion agents
(use a commercially available solvent). Do not allow the solvent to penetrate the
bearings and shaft seals – this could damage the material.
• Carefully align the motor and the driven machine to avoid placing any unacceptable
strain on the motor shafts (observe permitted overhung load and axial load!).
• Do not butt or hammer the shaft end.
• Ensure there is sufficient clearance around the unit to allow for adequate cooling.
Furthermore, the unit must be positioned in such a way that it does not reuse the air
warmed by other devices.
• Balance components for subsequent mounting on the shaft with a half key (output
shafts are balanced with a half key).
Installation in
damp locations or
in the open
• Use suitable cable glands for the incoming cable (use reducing adapters if
necessary) according to the installation instructions.
• Coat the threads of cable glands and screw plugs with sealant and tighten them well
– then coat them again.
• Seal the cable entry well.
• Clean the sealing surfaces of the terminal box and the terminal box cover carefully
before re-assembly; gaskets have to be glued in on one side. Replace brittle gaskets.
• Restore the anticorrosion coating if necessary
• Check enclosure according to nameplate.
4.2.3 Installation tolerances
NOTE ON EXPLOSION PROTECTION
• If using belt pulleys:
– Only use belts that do not build up an electrostatic charge.
– Do not exceed the maximum permitted overhung load.
• Use an appropriate cover to protect motors in vertical mounting positions from
objects or fluids entering (protection cowl C)!
Shaft end Flanges
Diameter tolerance according to EN 50347
• ISO j6 with ∅ ≤ 28 mm
• ISO k6 with ∅ ≥ 38 mm up to ≤ 48 mm
• ISO m6 with ∅ ≥ 55mm
• Center bore in accordance with DIN 332, shape
DR..
Centering shoulder tolerance according to
EN 50347
• ISO j6 with ∅ ≤ 250 mm
• ISO h6 with ∅ ≥ 300 mm

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 17
5
General information
Electrical Installation
5 Electrical Installation
5.1 General information
5.1.1 Additional regulations for potentially explosive atmospheres
In addition to the generally applicable installation regulations for low-voltage equipment
(e.g. in Germany: DIN VDE 0100, DIN VDE 0105), it is also necessary to comply with
the special regulations for setting up electrical machinery in potentially explosive atmo-
spheres (operating safety regulations in Germany: EN 60079-14; EN 61241-14 and sys-
tem-specific regulations).
5.1.2 Cable entries
The terminal boxes have metric threaded holes according to EN 50262 or NPT threaded
holes according to ANSI B1.20.1-1983. All metric cable entries are supplied with ATEX
certified closing plugs.
To establish the correct cable entry, the sealing plugs must be replaced by ATEX ap-
proved cable glands with strain relief. Select the cable screw fitting according to the
outer diameter of the cable used. The IP enclosure of the cable entry must be at least
as high as the IP enclosure of the motor.
All cable entries that are not required must be sealed off with an ATEX certified closing
plug after completion of the installation (→ maintaining the enclosure).
5.1.3 Equipotential bonding
In accordance with EN 60079-14 and EN 61241-14, it might be necessary to establish
a connection to an equipotential bonding system. Observe section "Improving the
grounding (EMC)" (see page 19).
NOTES
• Do observe the safety notes in chapter 2 (see page 7) during installation!
• Use switch contacts in utilization category AC-3 according to EN 60947-4-1 for
switching the motor.

18 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
5Using wiring diagrams and terminal assignment diagrams
Electrical Installation
5.2 Using wiring diagrams and terminal assignment diagrams
Connect the motor only as shown in the wiring diagram(s) included with the motor. Do
not connect or start up the motor if the wiring diagram is missing. You can obtain
the valid wiring diagrams free of charge from SEW-EURODRIVE.
5.3 Wiring instructions
Comply with the safety notes during startup.
5.3.1 Protecting motor protection devices against interference
In order to protect SEW motor protection devices (temperature sensors TF) against in-
terference:
• You may route separately shielded supply cables together with switched-mode
power lines in one cable.
• You must not route unshielded supply cables together with switched-mode power
lines in one cable.

Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315 19
5
Improving the grounding (EMC)
Electrical Installation
5.4 Improving the grounding (EMC)
For improved, low-impedance grounding at thigh frequencies, we recommend using the
following connection:
5.4.1 Size DR.315:
• 1 x hex head bolt ISO 4017 M12 x 30
• 1 x washer ISO 7090
• 1 x serrated lock washer DIN 6798
370040459
[1] Use the grounding screw at the terminal box
[1]

20 Operating Instructions – Explosion-Proof AC Motors – DRS/DRE/DRP 315
5Environmental conditions during operation
Electrical Installation
5.5 Environmental conditions during operation
5.5.1 Ambient temperature
The temperature range of -20 °C to 40 °C must be ensured unless specified otherwise
on the nameplate. Motors intended for use in higher or lower ambient temperatures have
the appropriate designation on the nameplate.
5.5.2 Installation altitude
The maximum installation altitude of 1000 m above sea level must not be exceeded.
5.5.3 Hazardous radiation
Motors must not be subjected to hazardous radiation (such as ionizing radiation). Con-
tact SEW-EURODRIVE if necessary.
5.5.4 Hazardous gases, vapors and dusts
If used according to their designated use, explosion-proof motors are incapable of ignit-
ing explosive gases, vapors or dusts. However, explosion-proof motors may not be sub-
jected to gases, vapors or dusts that endanger operational safety, for example through
•Corrosion
• Damage to the protective coating
• Damage to the sealing material
etc.