ABB ACS800-U7, Hardware Manual

Page: 62 / 148

Electrical installation
62
2. Measure the insulation resistance between each phase conductor and the
Protective Earth conductor using a measuring voltage of 500 V DC. The
insulation resistance of an ABB 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.
Brake resistor assembly
Check the insulation of the brake resistor assembly (if present) as follows:
1. Check that the resistor cable is connected to the resistor, and disconnected from
the drive output terminals R+ and R-.
2. At the drive end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the combined conductors and the PE
conductor by using a measuring voltage of 1 kV DC. The insulation resistance
must be higher than 1 Mohm.
Warning sticker
A multi-language sticker is attached onto the drive module cover. Attach the warning
sticker in the local language onto the cover of the drive module.
ohm
M
3~
U1
V1
W1 PE
ohm
R-
R+
PE