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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
the safety instructions can cause injury or death.
WARNING! During the installation procedure, the supply and inverter modules may
have to be temporarily extracted from the cabinet. The modules are heavy, and have
a high centre of gravity. In order to minimise the danger of toppling over, keep the
sheet metal support supplied with the drive attached to the modules whenever
manoeuvring them outside the cabinet.
Before installation
Checking the insulation of the assembly
Every drive has been tested for insulation between the main circuit and the chassis
(2500 V rms 50 Hz for 1 second) at the factory. Therefore, do not make any voltage
tolerance or insulation resistance tests (e.g. hi-pot or megger) on any part of the
drive. When checking the insulation of the assembly, proceed in the following
manner:
WARNING! Check the insulation before connecting the drive to the supply. Make
sure that the drive is disconnected from the supply (input power).
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 of the motor cable and motor between each
phase and the Protective Earth using a measuring voltage of 500 VDC. The
insulation resistance of an ABB motor must exceed 10 Mohm (reference value at
25 °C). For the insulation resistance of other motors, please consult the
manufacturer's instructions.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Safety instructions
on the first pages of this manual. Ignoring
71
Electrical installation
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