2-11
Name
Function
Input reactor (harmonic
control,electrical coordination,
power-factor improvement)
(ALI-***)
This part is used when the unbalance voltage rate is 3% or more and
power supply is 500 kVA or more, and there is a rapid change in the
power supply. It also improves the power factor.
Radio noise filter (zero-phase
reactor) (ZCL-
***
)(FC-
**
)
Using the inverter may cause noise on the peripheral radio through the
power lines. This part reduces noise.
Noise filter for Inverter
(NF-***)
This part reduces common noise generated between the power supply
and the ground, as well as normal noise. Put it in the primary side of
inverter.
Input radio noise filter
(capacitor filter) (CFI-*)
This part reduces radiation noise emitted from wire at the input.
Direct reactor (DCL-*-**)
This part control harmonic from inverter.
Breaking resistor
Regenerative breaking unit
This part is used for applications that need to increase the brake
torque of the inverter or to frequently turn on and off and to run high
inertia load.
Output noise filter (ACF-C*)
This part reduces radiation noise emitted from wire by setting between
inverter and motor. And it reduces wave fault to radio and TV, it is used
for preventing malfunction of sensor and measuring instruments.
Radio noise filter(zero-phase
reactor) (ZCL-***)
This part reduces noise generated at the output of the inverter. (It is
possible to use for both input and output.)
Output alternation reactor
Reducing vibration, Thermal
relay, preventing misapplication
(ACL-*-**)
Running motors with the inverter generates vibration greater than that
with commercial power supply. This part installed between the inverter
and motor reduces torque ripple. When the cable length between the
inverter and motor is long (10m or more), a countermeasure for a
malfunction of the thermal relay by harmonic due to switching on
inverter is taken by inserting reactor.
There is the way to use current sensor in stead of thermal relay.
LCR filter
Sine-wave filter at the output.
(3) Wiring Equipment
Refer to “(4) Common applicable tools”
(Note 1) The applicable tools indicate for Hitachi standard four-pole squirrel-
cage Motor.
(Note 2) Select applicable tools for breakers examining the capacity of
breakers.(Use Inverter type.)
(Note 3) Use earth-leakage breakers (ELB) for safety.
(Note 4) Use 60/75ºC copper electric wire.
(Note 5) It needs bigger wires for power lines, if the distance exceeds 20m.
(Note 6) 0.75mm
2
for Alarm output contact.
(Note 7) Separate by the sum wiring distance from Inverter to power supply,
from inverter to motor for the sensitive current of leak breaker (ELB).
(Note 8) When using CV wire and wiring by rigid metal conduit, leak flows.
(Note 9) IV wire is high dielectric constant. So the current increase 8 times.
Therefore, use the sensitive current 8
times as large as that of the left list. And if
the distance of wire is over 100m, use CV
wire.
Chapter 2 Installation and Wiring
Chapter 2 Installation and Wiring
Electric
conductor
ELB
RB
R
S
T
U
V
W
PD
P
N
R0
T0
In
ve
rt
e
r
Motor
IM
Power supply
Wiring
distance
Sensitive
Current(mA)
100m and less
50
300m and less
100
