ABB ACS880-17 - Motor and Motor Cable

90 Electrical installation
 Motor and motor cable
WARNING! Obey the instructions in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
WARNING! Use a vacuum cleaner with antistatic hose and nozzle. Using a
normal vacuum cleaner creates static discharges which can damage circuit
boards.
1. Stop the drive and do the steps in section Electrical safety precautions (page 16)
before you start the work.
2. Check that the motor cable is disconnected from the drive output terminals U2, V2 and
W2.
3. 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.
Checking the compatibility with IT (ungrounded) systems
 EMC filter (option +E202)
EMC filter (option +E202) is not suitable for use in an IT (ungrounded) system. If the drive
is equipped with filter +E202, disconnect the filter before you connect the drive to the
supply network. For instructions on how to do this, see EMC filter and ground-to-phase
varistor disconnecting instructions, ACS880 frames R1 to R11 (3AUA0000125152
[English]).
WARNING! If a drive with EMC filter (option +E202) is installed in an IT system
(an ungrounded power system or a high resistance-grounded [over 30 ohm]
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 unit.
 Ground-to-phase varistor
The ground-to-phase varistor of the drive is not suitable for use in an IT (ungrounded)
system. Disconnect the ground-to-phase varistor before you connect the drive to the
supply network. For instructions on how to do this, see EMC filter and ground-to-phase
varistor disconnecting instructions, ACS880 frames R1 to R11 (3AUA0000125152
[English]).
ohm
M
3~
U1
V1
W1
PE
ohm