185
Precautions for maintenance and inspection
3
3.3.4
Insulation resistance test using megger
1) Before performing the insulation resistance test on the external circuit, disconnect
the cables from all terminals of the inverter so that the test voltage is not applied to
the inverter.
2) For the continuity test of the control circuit, use a tester (high resistance range) and
do not use the megger or buzzer.
3) For the inverter, conduct the insulation resistance test on the main circuit only as
shown below and do not perform the test on the control circuit. (use the 500VDC
megger)
3.3.5
Pressure test
Do not conduct a pressure test. Deterioration may occur.
U
V
W
Inverter
Power
supply
IM
Motor
500VDC class
megger
R
S
T
Earth (Ground) terminal
Содержание FR-S500 Series
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