SEW-Eurodrive DR 315 Series, Operating Instructions Manual

Page: 34 / 268

4
Mechanical installation
Preliminary work after longer periods of storage
Operating Instructions – AC Motors
34
4.2.3 Drying the motor
Use either warm air or an isolation transformer to dry the motor.
INFORMATION
The motors of size 56 and DR..J motors must be dried only by warm air.
WARNING
Risk of crushing due to torque at the motor shaft.
Severe or fatal injuries.
• Only use warm air for drying DR..J motors.
Drying the motor with warm air
1. Dry the motor with warm air.
2. End the drying process when the minimum insulation resistance is exceeded.
Dry the motor with an isolation transformer
1. Connect the windings in series.
2. Auxiliary AC voltage supply max. 10% of the nominal voltage with max. 20% of the
rated current
Connect the windings in series: R13 wiring diagram
[1]
2336250251
[1] Transformer
Connect the windings in series: wiring diagram R72
[1]
V3
T8 W3
T9
V2
T5 W2
T6
V1
T2
U1
T1
W1
T3
U3
T7
U2
T4
W4
T12
V4
T11
U4
T10
[2]
2343045259
[1] Motor terminal boards [2] Transformer
25851535/EN – 02/2019