Electrical Installation; What This Chapter Contains; Before Installation; It (Ungrounded) Systems - ABB ACS800-U7 Hardware Manual

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
the safety instructions can cause injury or death.

Before installation

IT (ungrounded) systems

A drive equipped with no EMC filter or with EMC filter +E210 is suitable for IT
(ungrounded systems). If the drive is equipped with EMC filter +E202, disconnect
the filter before connecting the drive to an ungrounded system. For detailed
instructions on how to do this, please contact your local ABB representative.
WARNING! If a drive with EMC filter +E202 is installed on an IT system [an
ungrounded power system or a high resistance-grounded (over 30 ohms) 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.

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.

Input cable

Check the insulation of the input cable according to local regulations before
connecting it to the drive.

Motor and motor cable

1. Check that the motor cable is disconnected from the drive output terminals U2,
V2 and W2.
Safety instructions on the first pages of this manual. Ignoring
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Electrical installation