Checking The Insulation Of The Drive; Checking The Insulation Of The Input Cable; Connecting The Motor Cable At The Motor End; Checking The Insulation Of The Motor And Motor Cable - ABB ACS580-07 Hardware Manual

76 Electrical installation
￭

Checking the insulation of the drive

WARNING!
Do not make any voltage withstand 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.
￭

Checking the insulation of the input cable

Check the insulation of the input cable according to local regulations before connecting it
to the drive.
￭

Connecting the motor cable at the motor end

Connect the power cables at the motor end. Always ground the motor cable shield at the
motor end. For minimum radio frequency interference, ground the motor cable shield 360
degrees at the entry of the motor terminal box.

Checking the insulation of the motor and motor cable

Check that the motor cable is disconnected from the drive output terminals U2, V2 and
W2.
1. 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, 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.
1000 V DC,
ohm
> 100 Mohm
ohm
U1
V1
W1
PE
U1-V1, U1-W1, V1-W1
M
3~
U1-PE, V1-PE, W1-PE