Mitsubishi Electric FR-A802-P Instruction Manual page 105

Measurement of main circuit voltages, currents and powers
5.2.7
Insulation resistance test using megger
• For the inverter and the converter unit, 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
and the converter unit so that the test voltage is not applied to the inverter and the converter unit.
• For the continuity test of the control circuit, use a tester (high resistance range) and do not use the megger or buzzer.
Power
supply
500 VDC
megger
5.2.8
Pressure test
Do not conduct a pressure test. Deterioration may occur.
104
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
R/L1 P/+
Converter
S/L2
N/-
unit
T/L3
Earth (ground) terminal
P/+ U
Inverter
N/-
V
W
Earth (ground) terminal
Motor
IM
500 VDC
megger