ABB ACS320 - Motor and Motor Cable

46 Electrical installation
 Motor and motor cable
Check the insulation of the motor and motor cable as follows:
1. Check that the motor cable is disconnected from the drive output terminals T1/U,
T2/V and T3/W.
2. Measure the insulation resistance between the phase conductors and between
each phase conductor and the Protective Earth (PE) conductor. Use a measuring
voltage of 500 V DC. The insulation resistance of a motor must exceed 10 Mohm
(reference value at 25 °C or 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.
ohm
M
3~
U1
V1
W1
PE
500 V DC,
≥ 10 Mohm
U1-V1, U1-W1, V1-W1
U1-PE, V1-PE, W1-PE