Checking The Insulation Of The Assembly; Drive; Input Power Cable; Measuring The Insulation Resistance Of The Motor And Motor Cable - ABB ACS560 Hardware Manual

84 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. Voltage tolerance or insurance resistance tests can result in damage of
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.
￭

Measuring the insulation resistance of the motor and motor cable

WARNING!
Obey the safety instructions of the drive. If you ignore them, injury or
death, or damage to the equipment can occur. If you are not a qualified
electrical professional, do not do installation, commissioning or
maintenance work.
1. Do the steps in section
the work.
2. Make sure that the motor cable is disconnected from the drive output terminals.
3. Measure the insulation resistance between each phase conductor and the
protective earth conductor. Use a measuring voltage of 1000 V DC. The
insulation resistance of an ABB motor must be more than 100 Mohm (reference
value at 25 °C [77 °F]). For the insulation resistance of other motors, refer to
the manufacturer's instructions.
Note: Moisture inside the motor reduces the insulation resistance. If you think
that there is moisture in the motor, dry the motor and do the measurement
again.
1000 V DC,
> 100 Mohm
Electrical safety precautions (page 18)
ohm
U1
U1-PE, V1-PE, W1-PE
M
V1
3~
W1
PE
before you start