Checking The Insulation Of The Assembly - ABB ACS800-U4 Hardware Manual

Checking the insulation of the assembly

Every drive module 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. Check the insulation of the assembly as follows.
WARNING! Check the insulation before connecting the drive to the mains. Make
sure that the drive is disconnected from the mains (input power).
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 the 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.
ohm
M
PE
55
Installation