Insulation Resistance Test Using Megger; Pressure Test - Mitsubishi Electric FR-CS82S-025 Instruction Manual

7.2.7

Insulation resistance test using megger

• For the inverter, conduct the insulation resistance test on the main circuit only as follows 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.
Power
supply
500 VDC
megger
7.2.8

Pressure test

Do not conduct a pressure test. Deterioration may occur.
236
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.2 Measurement of main circuit voltages, currents, and powers
Motor
R/L1
U
Inverter
S/L2 V
T/L3
W
IM