CHAPTER 3
WIRING
3-6
3.2 External Wiring
Items Explanations
Power
supply
Please follow the specific power
supply requirement shown in
APPENDIX-A.
Fuse/NFB
(Optional)
There may be inrush current during
power up. Please check the chart of
APPENDIX B and select the correct
fuse with rated current. NFB is
optional.
Magnetic
contactor
(Optional)
Please do not use a Magnetic
contactor as the I/O switch of the AC
drive, this will reduce the operating
life cycle of the AC drive.
Input AC
Line
Reactor
(Optional)
In order to improve the input power
factor, reduces harmonics and
protection from AC line disturbances.
(Surge, switching spike, power flick,
etc.) AC line reactor should be
installed when the power supply
capacity is 500kVA or more and
exceeds 6 times of the inverter
capacity, or the wiring distance within
10m.
Zero-phase
Reactor
(Ferrite
Core
Common
Choke)
(Optional)
Zero phase reactors are used to
reduce radio noise specify when the
audio equipments installed near the
inverter. Good effective for noise
reduction on both the input and
output sides. Attenuation quality is
good in a wide range from AM band
to 10Mhz.
EMI filter
(Optional)
To reduce the electromagnetic
interference. Please refer to
Appendix B for detail.
DC Choke
(Optional)
Please wire to the manufacturer’s
specification to avoid damage to the
AC drive.
Braking
Resistor
(Optional)
Used to reduce stopping time of the
motor. Please refer to the chart on
Appendix B for specific Braking
Resistors.
Output AC
Line
Reactor
(Optional)
Motor surge voltage amplitudes
depending on the motor cable
length. For long motor cable
application, it is necessary installed
Motor
Output AC
Line Reactor
Power Supply
Magnetic
contactor
Input AC
Line Reactor
EMI Filter
R/L1
S/L2
T/L3
U/T1
V/T2
W/T3
+2/B1
B2
Braking
Resistor
Zero-phase
Reactor
DC
Choke
+1
Zero-phase
Reactor
FUSE/NFB