Insulation Resistance Test Using Megger - Mitsubishi Electric FR-F820-00046 Instruction Manual

In the initial setting of the CA type inverter, a pulse train proportional to the output frequency is output across the analog current
output terminals CA and 5 on the inverter. Measure the current using an ammeter or tester.
For detailed specifications of the analog current output terminal CA, refer to
7.2.8

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
7.2.9 Pressure test
Do not conduct a pressure test. Deterioration may occur.
610
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.2 Measurement of main circuit voltages, currents, and powers
Motor
R/L1
U
Inverter
IM
S/L2
V
T/L3
W
page 304.