Delta Electronics VFD-EL series, User Manual

Page: 19 / 181

Chapter 2 Installation and Wiring
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2-6 Revision 2016/03, 6ELE, V1.14
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
+
Zero-phase
Reactor
Zero-phase
Reactor
FUSE/NFB
-
B
R
B
U
E
B
ra
ke
re
si
st
or
B
ra
k
un
it
Items Explanations
Power supply
Please follow the specific power supply
requirements shown in Appendix A.
Fuse/NFB
(Optional)
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.
Magnetic
contactor
(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.
Input AC Line
Reactor
(Optional)
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
Reactor
(Ferrite Core
Common
Choke)
(Optional)
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)
EMI filter
It is used to reduce electromagnetic
interference. All 230V and 460V models are
built-in EMI filter.
Brake
Resistor and
Brake Unit
(Optional)
Used to reduce the deceleration time of the
motor. Please refer to the chart in Appendix B
for specific Brake Resistors.
Output AC
Line Reactor
(Optional) Motor surge voltage amplitude depends on
motor cable length. For applications with long
motor cable (>20m), it is necessary to install a