￭
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 Electrical safety precautions (page 21) before you start
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
U1-PE, V1-PE, W1-PE
ohm
M
3~
U1
V1
W1
PE
￭
Measuring the insulation resistance of the input power cable
Before you connect the input power cable to the drive, measure its insulation resistance
according to local regulations.
Compatibility check - IT (ungrounded) earthing system
Drives with a category 2, 1st environment EMC filter (option +E202) are not suitable
for use in an IT (ungrounded) supply network system. If the drive is equipped with
option +E202, disconnect the filter before connecting the drive to the IT supply network.
Contact ABB for instructions.
WARNING!
Do not install a drive equipped with EMC filter +E202 on an IT system (an
ungrounded power system or a high-resistance-grounded [over 30 ohms] power
system). The system will be connected to ground potential through the EMC
filter capacitors of the drive. This can cause danger, or damage the drive.
Attaching the device stickers to the cabinet door
A multilingual device label sticker is delivered with the drive. Attach the stickers in the
appropriate language on the English texts; see section Door devices (page 48).
116 Electrical installation
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