External Wiring - Delta Electronics VFD-M Series User Manual

2.2 External Wiring

Power Supply
EMI Filter
R/L1 S/L2
U/T1 V/T2
Motor
Revision May 2008, ME14, SW V3.04
FUSE/NFB
Magnetic
contactor
Input AC
Line Reactor
Zero-phase
Reactor
T/L3
B1
Brake
Resistor
B2
W/T3
Zero-phase
Reactor
Output AC
Line Reactor
Chapter 2 Installation and Wiring|
Items
Please follow the specific power
Power
supply requirement shown in
supply
APPENDIX A.
There may be inrush current during
power up. Please check the chart of
Fuse/NFB
APPENDIX B and select the correct
(Optional)
fuse with rated current. NFB is
optional.
Please do not use a Magnetic
Magnetic
contactor as the I/O switch of the AC
contactor
drive, this will reduce the operating
(Optional)
life cycle of the AC drive.
Used to improve the input power
factor, to reduce harmonics and
provide protection from AC line
disturbances. (Surge, switching
Input AC
spike, power flick, etc.) AC line
Line Reactor
reactor should be installed when the
power supply capacity is ≧500kVA
(Optional)
or phase lead reactor will be
switched. And the wiring distance
should not exceed 10m. Please refer
to Appendix B for detail.
Zero phase reactors are used to
reduce radio noise especially when
Zero-phase
audio equipment installed near the
Reactor
inverter. Effective for noise reduction
(Ferrite Core
on both the input and output sides.
Common
Attenuation quality is good for a wide
Choke)
range from AM band to 10Mhz.
(Optional)
Appendix B specifies zero phase
reactors. (RF220X00A)
To reduce electromagnetic
EMI filter
interference. Please refer to
(Optional)
Appendix B for detail.
Used to reduce stopping time of the
Brake
motor. Please refer to the chart on
Resistor
Appendix B for specific brake
(Optional)
resistors.
Motor surge voltage amplitudes
Output AC
depending on motor cable length. For
Line Reactor
long motor cable applications (>20m),
it is necessary to install on the
(Optional)
inverter output side.
Explanations
2-5