External Wiring; Power Supply - Delta Electronics AC Drive VFD-F Series User Manual

3.2 External Wiring

Power Supply

FUSE/NFB
Magnetic
Contactor
Input AC
Line Reactor
Zero-phase
Reactor
EMI Filter
E
R/L1 S/L2 T/L3
+/B1
U/T1 V/T2 W/T3
Zero-phase
Reactor
Output AC
Line Reactor
Motor
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Power
supply
Fuse/NFB
(Optional)
Magnetic
contactor
(Optional)
Input AC
Line Reactor
(Optional)
B2
Zero-phase
-
Reactor
E
(Ferrite Core
Common
Choke)
(Optional)
EMI filter
(Optional)
Brake
Resistor
(Optional)
Output AC
Line Reactor
(Optional)
Items
Please follow the specific power
supply requirements shown in
Appendix A.
There may be an inrush current
during power up. Please check the
chart of Appendix B and select the
correct fuse with rated current. Use
of an NFB is optional.
Please do not use a Magnetic
contactor as the I/O switch of the AC
motor drive, as it will reduce the
operating life cycle of the AC drive.
Used to improve the input power
factor, to reduce harmonics and
provide protection from AC line
disturbances (surges, switching
spikes, short interruptions, etc.). AC
line reactor should be installed when
the power supply capacity is 500kVA
or more or advanced capacity is
activated. The wiring distance should
be 10m. Refer to appendix B for
≤
details.
Zero-phase reactors are used to
reduce radio noise especially when
audio equipment is 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 the zero-phase
reactor. (RF220X00A)
To reduce electromagnetic
interference, please refer to
Appendix B for more details.
Used to reduce the deceleration time
of the motor. Please refer to the chart
in Appendix B for specific Brake
Resistors.
Motor surge voltage amplitude
depends on motor cable length. For
applications with long motor cable
(>20m), it is necessary to install a
reactor at the inverter output side.
3-5
VFD-F Series
Explanations
3