Delta Electronics VFD-F Series manual External Wiring

3.2 External Wiring

Power Supply

	FUSE/NFB
	Magnetic
	Contactor
Input AC
Line Reactor
	Zero-phase
	Reactor
EMI Filter		BrakeUnit (Optional)
R/L1 S/L2 T/L3	E
	+/B1
	B2 BR	VFDB	orBR
	-		sti
U/T1 V/T2 W/T3	E		esR )al n
	Zero-phase		eakrB oitOp(

Reactor

Output AC

Line Reactor

Motor

VFD-F Series

Items	Explanations
Power	Please follow the specific power
	supply requirements shown in
supply
	Appendix A.
	There may be an inrush current
Fuse/NFB	during power up. Please check the
	chart of Appendix B and select the
(Optional)
	correct fuse with rated current. Use
	of an NFB is optional.
Magnetic	Please do not use a Magnetic
	contactor as the I/O switch of the AC
contactor
	motor drive, as it will reduce the
(Optional)
	operating life cycle of the AC drive.
	Used to improve the input power
	factor, to reduce harmonics and
	provide protection from AC line
Input AC	disturbances (surges, switching
	spikes, short interruptions, etc.). AC
Line Reactor	line reactor should be installed when
(Optional)	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
Zero-phase	reduce radio noise especially when
Reactor	audio equipment is installed near the
(Ferrite Core	inverter. Effective for noise reduction
	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 the zero-phase
	reactor. (RF220X00A)
EMI filter	To reduce electromagnetic
	interference, please refer to
(Optional)
	Appendix B for more details.
Brake	Used to reduce the deceleration time
	of the motor. Please refer to the chart
Resistor
	in Appendix B for specific Brake
(Optional)
	Resistors.
Output AC	Motor surge voltage amplitude
	depends on motor cable length. For
Line Reactor	applications with long motor cable
(Optional)	(>20m), it is necessary to install a
	reactor at the inverter output side.

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