ABB ACS 6000 - IFU Preparation; Main Circuit Measurement

ABB
Chapter 6 - Insulation Resistance Measurement
ACS 6000 Commissioning Manual
3BHS135824 ZAB E01Rev. D 35 (of 62)
6.2.5 IFU Preparation
The following preparatory measures must be taken in an Input Filter
Unit (IFU):
DC_NP
1
1 Short circuit the NP capacitor.
6.2.6 Main Circuit Measurement
• The insulation measurement is carried out with 5kV DC voltage.
• The plus terminal is connected to the combined circuit of the DC
link. The minus terminal is connected to the ground potential.
• The measurement time is 60 sec.
• The lowest value is to be recorded.
• The value of the insulation resistance must be higher than 0.5 MΩ.
In the commissioning record, write down the measured value of the
insulation resistance and the value of the water conductivity present
at the time of measurement. Carry out the measurement as soon as
the pumps have stopped to avoid an error in the conductivity reading.