Name: Omron MX2 Series
Brand: Omron
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11 Maintenance and Inspection

11 - 10

Multi-function Compact Inverter 3G3MX2-EV2 User’s Manual (I666-E1)

11-1-5 Megger Test

Before performing a megger test on external circuits, be sure to disconnect all the terminals of the

inverter and not to apply the test voltage to the inverter. Use a 500 VDC megger for a megger test.

For a megger test on the inverter main circuit, short-circuit the terminals R/L1, S/L2, T/L3, U/T1, V/T2,

W/T3, RB, +1, P/+2, and N/− with wires, as shown below.

Because the insulation resistance rating of the single inverter unit is 5 M or higher, it is normal if the

resistance is 5 M or higher.

•

For the inverter, do not perform a megger test on the control circuit. Perform it only on the main cir-

cuit.

•

Use a tester (in a high resistance range) for a power-on test on the control circuit. Do not use a meg-

ger or buzzer.

11-1-6 Withstand Voltage Test

Do not conduct a withstand voltage test on any part of the inverter.

Doing this test is dangerous because it may cause damage to or deterioration of the parts inside the

inverter.

11-1-7 Inverter/Converter Unit Test

Use the following procedure to check conditions of the inverter and converter units by using a tester.

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 regenerative braking resistance (P/+, RB).

2 Prepare a tester. Use the 1  resistance measurement range.

Preparation

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Omron MX2 Series Specifications

General

Cooling Method	Fan cooling
Output Frequency Range	0.1 to 400 Hz
Control Method	V/f control, Sensorless vector control
Protection Functions	Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit
Communication Options	Modbus RTU
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Ambient Operating Temperature	-10°C to +50°C
Enclosure	IP20
Storage Temperature	-20°C to +65°C
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000m
Power Supply Voltage	200-240V AC
Input Voltage	3-phase 200-240V AC