2-3 Wiring „ Connecting to the Power Supply and Motor Inverter 2 Design Power supply Motor * Terminal symbols for 3G3MX-AE are indicated in parentheses ( ). •Do not connect the power supply other than to R/L1, S/L2, or T/L3. •Do not remove the short-circuit bar between P/+2 and +1, except when a DC reactor is connected. Note 1: Install an earth leakage breaker on the power supply input side. (Select an earth leakage breaker having a larger high-frequency sensed current and avoid unnecessary operations.) If the wiring between the Inverter and the motor is too long (longer than 10 m), the thermal relay may malfunction due to harmonics.
Install an AC reactor on the Inverter output side, or use a current sensor instead of the thermal relay. Note 2: Connect securely to the ground as specified (type-D grounding for 200-V class, and type-C grounding for 400-V class). Do not share the grounding electrode with other strong electrical devices. Example of incorrect grounding Example of correct grounding Inverter Inverter Inverter Inverter Ground bolt Inverter Inverter 2-12 R/L1 (L1) S/L2 (L2) T/L3 (N/L3) U/ T1 V/ T2 W/ T3