Mitsubishi Electric FR-F800 Series Instruction Manual page 636

7.2.7
• 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.
7.2.8
Do not conduct a pressure test. Deterioration may occur.
Downloaded from ManualsNet.com
Insulation resistance test using megger
R/L1
Power
Inverter
S/L2
supply
T/L3
500 VDC
megger
Pressure test
search engine
Motor
U
M
V
W
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.2 Measurement of main circuit voltages, currents, and powers
1
2
3
4
5
6
7
8
9
10
635