Hitachi J300U Series Instruction Manual page 29

R S T
(L1) (L2) (L3)
P
(+)
Inverter
RB
(T1) (T2) (T3)
U V W
Thermal
relay
Motor
IM
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.
Detective current (mA)
length
100 m and less
300 m and less
600 m and less
Part description
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 5:
30
NOTE 6:
100
200
5-9
Function
When using CV wire and metal tube,
the leakage current is around 30 mA/km.
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.