Electrical installation
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Electrical installation
What this chapter contains
This chapter describes the electrical installation procedure of the drive.
WARNING! Only qualified electricians are allowed to carry out the work described in
this chapter. Follow the Safety instructions on the first pages of this manual. Ignoring
the safety instructions can cause injury or death.
WARNING! During the installation procedure, inverter modules may have to be
temporarily extracted from the cabinet. The modules have a high centre of gravity.
Checking the insulation of the assembly
Drive
Do not make any voltage tolerance or insulation resistance tests on any part of the
drive as testing can damage 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.
Supply cable
Check the insulation of the supply (input) cable according to local regulations before
connecting to the drive.
Motor and motor cable
Check the insulation of the motor and motor cable as follows:
1. Check that the motor cable is connected to the motor, and disconnected from the
drive output terminals U2, V2 and W2.
2. 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.
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