Mitsubishi FR-A800-E - Specifications of the Inverter

Measurement of main circuit voltages, currents, and powers
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PRECAUTIONS FOR MAINTENANCE AND INSPECTION
5.2.7 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 500 VDC megger.)
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.
5.2.8 Pressure test
Do not conduct a pressure test. Deterioration may occur.
U
V
W
Inverter
500 VDC
megger
Power
supply
IM
Motor
R/L1
S/L2
T/L3