Megger Test; Withstand Voltage Test; Checking The Inverter And Converter - Omron 3G3MX2 User Manual

Megger Test

For a megger test of the external circuit, be sure to disconnect all the terminals of the Inverter
and not to apply the test voltage to the Inverter. Use a 500 V DC megger for a megger test.
Conduct the megger test for the Inverter's main circuit after short-circuiting terminals R/L1, S/
L2, T/L3, U/T1, V/T2, W/T3, RB, +1, P/+2 and N/− using wires, as shown below.
Conduct an Inverter megger test only to the main circuit, not to the control circuit.
Use a high resistance tester for a power distribution test of the control circuit. Do not use a megger
or buzzer.
500 VDC megger
Do not connect the
power supply wires.

Withstand Voltage Test

Do not conduct a withstand voltage test on any part of the Inverter.
Doing the test may cause damage or deteriorate to the parts inside the Inverter.

Checking the Inverter and Converter

The quality of the Inverter and converter can be checked using a tester.
Preparation
1. Disconnect the externally connected power supply wires (R/L1, S/L2, T/L3), the
motor connection wires (U/T1, V/T2, W/T3), and the generation control resistance
(P/+2, RB).
2. Prepare a tester. (Usable range is 1Ω measurement resistance.)
Checking method
The quality can be judged by measuring the conduction state of Inverter main circuit terminal
blocks R/L1, S/L2, T/L3U/T1, V/T2, W/T3, RB, P/+2, and N/− while alternating the tester polarity.
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-A@@@@)
RB +1
R/L1 S/L2 T/L3 U/T1
Power supply
8-1 Inspection and Maintenance
P/+2 N/−
Ground terminal
V/T2 W/T3
Do not connect to the motor.
IM
Motor
8
8-6