ABB ACS580-01 drives, Hardware Manual

Page: 74 / 226

74 Electrical installation
Checking the insulation of the assembly

Drive
Do not make any voltage tolerance or insulation resistance tests on any part of the
drive as testing can damage the drive. Every drive has been tested for insulation
between the main circuit and the chassis at the factory. Also, there are voltage-
limiting circuits inside the drive which cut down the testing voltage automatically.

Input power cable
Check the insulation of the input cable according to local regulations before
connecting it to the drive.

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 conductor. Use a measuring
voltage of 1000 V DC. The insulation resistance of a motor must exceed
100 Mohm (reference value at 25 °C or 77 °F). For the insulation resistance of
other motors, please consult the manufacturer’s instructions.
Note: Moisture inside the motor casing will reduce the insulation resistance. If
moisture is suspected, dry the motor and repeat the measurement.
ohm
M
3~
U1
V1
W1 PE
1000 V DC,
> 100 Mohm
U1-V1, U1-W1, V1-W1
U1-PE, V1-PE, W1-PE