Insulation Resistance Test Using Megger; Pressure Test - Mitsubishi Electric 800 Series Instruction Manual

Measurement of main circuit voltages, currents and powers
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.
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PRECAUTIONS FOR MAINTENANCE AND INSPECTION
R/L1
Power
Inverter
S/L2
supply
T/L3
500 VDC
megger
Motor
U
IM
V
W