Motor And Motor Cable; Brake Resistor Assembly; Checking The Compatibility With It (Ungrounded) Systems; Attaching The Device Stickers On The Cabinet Door - ABB ACS880-07 Hardware Manual

88 Electrical installation

Motor and motor cable


1. Check that the motor cable is 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, 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

Brake resistor assembly


Check the insulation of the brake resistor assembly (if present) as follows:
1. Check that the resistor cable is connected to the resistor, and disconnected from the
drive output terminals R+ and R-.
2. At the drive end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the combined conductors and the PE
conductor by using a measuring voltage of 1 kV DC. The insulation resistance must be
higher than 1 Mohm.
ohm

Checking the compatibility with IT (ungrounded) systems

EMC filters +E200 and +E202 are not suitable for use in an IT (ungrounded) system. If the
drive is equipped with filter +E200 or +E202, disconnect the filter before connecting the
drive to the supply network. For instructions on how to do this, contact your local ABB
representative.
WARNING! If a drive with EMC filter +E200 or +E202 is installed on an IT system
(an ungrounded power system or a high resistance-grounded [over 30 ohm]
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.

Attaching the device stickers on the cabinet door

A multilingual device label sticker is delivered with the drive. Attach the stickers in the local
language on the English texts, see section
U1
M
V1
3~
W1 PE
R+
R-
PE
Door switches and lights on page 41.