Electrical installation
55
Electrical installation
What this chapter contains
This chapter describes the electrical installation procedure of the drive.
WARNING! The work described in this chapter may only be carried out by a qualified
electrician. Follow the Safety instructions on the first pages of this manual. Ignoring
the safety instructions can cause injury or death.
Make sure that the drive is disconnected from the mains (input power) during
the installation. If the drive is already connected to the mains, wait for 5 min
after disconnecting mains power.
Checking the insulation of the installation
Drive
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.
Input cable
Check the insulation of the input cable before connecting it to the drive according to
local regulations.
Motor and motor cable
Check the insulation of the motor and motor cable as follows:
1. Check that the motor cable is disconnected from the drive output terminals U2,
V2 and W2.
2. Measure the insulation resistances of the motor cable and motor between each
phase and the Protective Earth by using a measuring voltage of 1 kV DC. The
insulation resistance must be higher than 1 Mohm.
PE
ohm
M
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