Commissioning The Motor - Siemens SINAMICS G115D Operating Instructions Manual

Limit values
The following limit values are valid for the insulation resistance at a rated voltage of U
and a winding temperature of +25 °C.
500 V
10 MΩ
0.5 MΩ / kV
Comply with the following points:
• If you measure a winding temperature other than +25 °C, convert the measured value to the
reference temperature +25 °C. The insulation resistance halves for every 10 K temperature
increase. The resistance doubles for every 10 K temperature decrease.
• If the insulation resistance is close to or below the minimum value, the cause could be
humidity and dirt accumulation. Dry the windings.
• During operation, the insulation resistance of the windings can fall to the critical insulation
resistance due to ambient and operational influences. Calculate the critical value for a
winding temperature of +25 °C. Multiply the rated voltage (kV) by the specific critical
resistance value (0.5 MΩ/kV). Example: Rated voltage U
kV = 0.345 MΩ.
12.2.13

Commissioning the motor

Note
Protect the motor against overload.
Do not exceed the maximum speed.
Note
With a brake with manual release:
No braking effect when the manual brake release lever is locked. The brake is then permanently
released.
Before commissioning the geared motor, ensure that the brake is not locked.
Unscrew the manual brake release lever and keep it separate from the geared motor.
Note
When starting / before switching on, use the appropriate circuit to ensure that the motor brake
is released.
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA
Measuring circuit voltage
Minimum insulation resistance for new, cleaned or repaired windings
Critical specific insulation resistance after a long operating time
Additional information on the SIMOGEAR geared motor
690 V: 690 V x 0.5 MΩ/
N
12.2 Specific data motor
< 2 kV
N
461