English (GB)
8
5. Construction
5.1 Mounting designations
5.2 Drain holes
As standard, MG motors have drain holes in the drive end of the
stator housing.
If the motor is installed in a humid environment or in areas with
high air humidity, open the bottom drain hole. The drain holes
enable the escape of water which has entered the stator housing,
for instance through condensation.
5.2.1 Number of drain holes
1. The flange can be turned 90 ° and 180 ° to both sides.
2. The flange can be turned 180 °.
3. The flange can be turned 90 ° to both sides.
5.3 Motor bearings
The motor bearing type is stated on the nameplate.
5.3.1 Motors with lubricating nipples
Frame size 160 and 180 motors have lubricating nipples both in
the drive end and the non-drive end. The bearings are lubricated
from factory and should therefore not be lubricated until
commissioning.
The lubricating intervals are stated on the nameplate with
mechanical data. For information about lubrication and
maintenance of bearings, see section
5.4 Balancing
The rotor is dynamically balanced. As standard, the rotor has
been balanced with a half key inserted (cylindrical shaft).
5.5 Cable entry/screwed connection
Motors are supplied without screwed cable entries. The table
below shows the number and size of the cable entry holes of the
terminal box according to EN 50262.
IEC 60034-7,
Code I
IEC 60034-7,
Code II
Flange-mounted motor (tapped-hole flange)
IM B 14
IM 3601
IM V 18
IM 3611
Flange-mounted motor (free-hole flange)
IM B 5
IM 3001
IM V 1
IM 3011
Foot-mounted motor
IM B 3
IM 1001
Foot-mounted motor (tapped-hole flange)
IM B 34
IM 2101
Foot-mounted motor (free-hole flange)
IM B 35
IM 2001
Caution
If the drain plug is removed, the motor enclosure
class will change from IP55 to IP44.
B 3
B 14, B 5,
B 34, B 35
MG 71, 80
One drain hole closed
with a plug
1
One drain hole closed
with a plug
1
MG 90-132
Two drain holes closed
with plugs
2
Three drain holes
closed with plugs
2
MG 160, 180
Three drain holes
closed with plugs
3
Four drain holes closed
with plugs
3
Frame
size
Model
Number x
dimensions
Description
71, 80
B, C, H
2 x (M20 x 1.5)
The holes have precast
threads and are closed
with knock-out cable
entries.
90, 100
B, C, D, H
4 x M20
The holes are closed
with knock-out cable
entries.
112, 132
C, D, F, H
4 x M25
160, 180 F, H
4 x M40
2 x M20
Summary of Contents for MG
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