Справочник Пользователя для Mitsubishi Electronics FR-D740-012
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Measurement of main circuit voltages, currents and powers
6.2.7
Insulation resistance test using megger
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 a 500VDC megger.)
on the control circuit. (Use a 500VDC megger.)
6.2.8
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 inverter so that the test voltage is not applied to the inverter.
For the continuity test of the control circuit, use a tester (high resistance range) and do not use the megger or buzzer.
the inverter so that the test voltage is not applied to the inverter.
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
S/L2
T/L3
U
V
V
W
Inverter
Earth (Ground)
500VDC
megger
megger
Power
supply
supply
IM
Motor