Insulation Resistance Test Using Megger; Pressure Test - Mitsubishi Electric FR-E720-0.1 K Instruction Manual

Measurement of main circuit voltages, currents and powers
6.2.8

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.)
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.
6.2.9

Pressure test

Do not conduct a pressure test. Deterioration may occur.
310
R/L1
Power
S/L2
supply
T/L3
500VDC
Inverter
megger
Earth (Ground)
Motor
U
IM
V
W