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Measurement of main circuit voltages, currents and powers
6.2.8 Insulation resistance test using megger
For the drive unit, conduct the insulation resistance test on the main circuit only as shown below and do not perform the test
on the control circuit. (Use a 500VDC megger.)
6.2.9 Pressure test
Do not conduct a pressure test. Deterioration may occur.
NOTE
Before performing the insulation resistance test on the external circuit, disconnect the cables from all terminals of
the drive unit so that the test voltage is not applied to the drive unit.
For the continuity test of the control circuit, use a tester (high resistance range) and do not use the megger or buzzer.
R/L1
S/L2
T/L3
U
V
W
Drive unit
Earth (Ground)
500VDC
megger
Power
supply
M
Moto
r