Hitachi J300U Series instruction manual Inverter

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R	S	T
(L1) (L2) (L3)
		(+) P
	Inverter		➤
		RB
(T1) (T2) (T3)
U	V	W
			➤
			➤

Thermal relay

Motor

IM

Part description		Function
AC reactor for		This part is used when the unbalance voltage ratio is 3%
improving		or more and power supply is 500 kVA or more, and there
the power factor		is a rapid change in the power supply.
(ALI-	L)	It also improves the power factor.
(ALI-	H)
Radio noise filter		Using the inverter may cause noise on the peripheral
(Zero phase		equipment through the power lines.
reactor) (ZCL-A)		This part reduces noise.
EMI filter for		This part reduces common noise generated between
inverter		the power supply and the ground, as well as normal noise.
(FFJ300-	)	Put it in the primary side of inverter.
Regenerative		This part is used for applications that needs to increase
resistor		the brake torque of the inverter or to frequently turn on
(RB	- )	and off and to run high inertia load.
Radio noise filter		This part reduces noise generated at the output of
(Zero phase		the inverter.
reactor) (ZCL-A)		(It is possible to use for both input and output.)
AC reactor for		Running motors with the inverter generates vibration
reducing vibration		greater than that with commercial power supply.
(ACL-L-	)	This part installed between the inverter and motor reduces
(ACL-H-	)	torque ripple.
		When the cable length between the inverter and motor is
		long, a countermeasure for a malfunction of the termal
		relay is taken.

NOTE 1: The applicable equipment is for Hitachi standard four pole squirrel-cage motor

NOTE 2: Be sure to consider the capacity of the circuit breaker to be used.

NOTE 3: Be sure to use bigger wires for power lines if the distance exceeds 20m.

NOTE 4: Be sure to use an grounding wire same size of power line or similar.

(*)Use AWG 16 wire for the alarm signal wire.

Classify the detective current of the earth leakage breaker depending on the total distance between the inverter and the motor.

length	Detective current (mA)
100 m and less	30
300 m and less	100
600 m and less	200

NOTE 5: When using CV wire and metal tube, the leakage current is around 30 mA/km.

NOTE 6: The leakage current becomes eight times because IV wires have a high dielectric constant. Therefore, use an one class larger earth leakage breaker according to the left table.

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