Delta Electronics VFD-M Series, User Manual

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Chapter 2 Installation and Wiring
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Revision May 2008, ME14, SW V3.04 2-5
2.2 External Wiring
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
B1
B2
Brake
Resistor
Zero-phase
Reactor
Zero-phase
Reactor
FUSE/NFB
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)
Used to improve the input power
factor, to reduce harmonics and
provide 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 phase lead reactor will be
switched. And the wiring distance
should not exceed 10m. Please refer
to Appendix B for detail.
Zero-phase
Reactor
(Ferrite Core
Common
Choke)
(Optional)
Zero phase reactors are used to
reduce radio noise especially when
audio equipment installed near the
inverter. Effective for noise reduction
on both the input and output sides.
Attenuation quality is good for a wide
range from AM band to 10Mhz.
Appendix B specifies zero phase
reactors. (RF220X00A)
EMI filter
(Optional)
To reduce electromagnetic
interference. Please refer to
Appendix B for detail.
Brake
Resistor
(Optional)
Used to reduce stopping time of the
motor. Please refer to the chart on
Appendix B for specific brake
resistors.
Output AC
Line Reactor
(Optional)
Motor surge voltage amplitudes
depending on motor cable length. For
long motor cable applications (>20m),
it is necessary to install on the
inverter output side.