Motor And Motor Cable; Custom Brake Resistor Assembly - ABB ACS880-07 Hardware Manual

100 Electrical installation

Motor and motor cable


WARNING! Obey the instructions in chapter
them, injury or death, or damage to the equipment can occur.
1. Stop the drive and do the steps in section
18 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 then 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
ohm

Custom brake resistor assembly


Check the insulation of the brake resistor assembly (if present) as follows:
WARNING! Obey the instructions in chapter
them, injury or death, or damage to the equipment can occur.
1. Stop the drive and do the steps in section
18 before you start the work.
2. Check that the resistor cable is connected to the resistor, and disconnected from the
drive output terminals R+ and R-.
3. 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
Precautions before electrical work
U1
M
V1
3~
W1
PE
Precautions before electrical work
R+
R-
PE
Safety instructions. If you ignore
Safety instructions. If you ignore
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