ABB ACS880-37LC Hardware Manual page 80

80 Electrical installation
1. Stop the drive and do the steps in section
you start the work.
2. Check that the motor cable is disconnected from the drive output terminals.
3. Measure the insulation resistance between the phase conductors and then between
each phase conductor and the Protective Earth conductor. Use a measuring voltage of
1000 V DC. The insulation resistance of an ABB motor must exceed 100 Mohm
(reference value at 25 °C [77 °F]). For the insulation resistance of other motors, consult
the manufacturer's instructions.
Note:
Moisture inside the motor casing reduces the insulation resistance. If moisture is
suspected, dry the motor and repeat the measurement.
1000 V DC,
ohm
> 100 Mohm
Electrical safety precautions (page 17)
ohm
U1
M
V1
3~
W1
PE
U1-V1, U1-W1, V1-W1
U1-PE, V1-PE, W1-PE
before