Hitachi J300U Series Wiring the Power Supply and Motor, L3 RB + T1 T2 T3 PE, Elb

The terminal board will be exposed when the front cover or terminal cover (450L/HF, 550L/HF) is removed. Wire the inverter in this state.

5.1Wiring the Power Supply and Motor

G	R	S	T RB P	N	U V	W G
(PE)	(L1)	(L2)	(L3) (RB) (+)	(-)	(T1) (T2)	(T3) (PE)

MOTOR

Dynamic

braking

resistor

Braking Units

ELB

Power supply

•The inverter will be damaged if the power supply is connected to the motor terminals U(T1), V(T2) and W(T3), so be sure not to make any mistakes.

•If multiple motors are to be connected, be sure to attach a thermal relay to each motor.

NOTE 1: When changing the power supply of the motor between the inverter and commer- cial power, be sure to install mechanically interlocked switches Mg1 and Mg2.

				Mg1
	ELB
Power	R (L1)	(T1)	U
	S (L2)	Inverter (T2)	V	Motor
supply	T (L3)	(T3) W
				Mg2
	Mg0

NOTE 2: Install an earth leakage breaker at the input of the inverter. (Select an earth leak- age breaker whose sensitive current level is raised in high frequency range.) When the cable length between the inverter and motor is long (more than 10 m), the thermal relay may malfunction due to higher harmonics. Therefore, install an AC reactor on the output side of the inverter or use a current sensor in place of the thermal relay.

5-3