Insulation Resistance Test Using Megger; Pressure Test - Mitsubishi Electric FR-D720 K Series 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.
288
R/L1
Power
S/L2
supply
T/L3
500VDC
Inverter
megger
Earth (Ground)
Motor
U
IM
V
W