Motor And Motor Cable; It (Ungrounded) Systems - ABB ACS800 Series Hardware Manual

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Motor and motor cable

Check the insulation of the motor and motor cable as follows:
1. Check that the motor cable is connected to the motor, and disconnected from the
drive output terminals U2, V2 and W2.
2. Measure the insulation resistance between each phase conductor and the
Protective Earth conductor using a measuring voltage of 1000 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.
ohm

IT (ungrounded) systems

Drives with EMC filter option +E202 or +E200 are not suitable for use in an IT
(ungrounded) system as such. Disconnect the EMC filter capacitors before
connecting the drive to an ungrounded system as described below.
WARNING! If a drive with an EMC filter +E202 or +E200 is installed on an IT system
(an ungrounded power system or a high resistance-grounded [over 30 ohms] power
system), the system will be connected to earth potential through the EMC filter
capacitors of the drive. This may cause danger, or damage the unit.
Electrical installation
U1
M
V1
3~
W1
PE