External Wiring - Delta Electronics AC Motor Drive VFD-E User Manual

Chapter 2 Installation and Wiring|

2.2 External Wiring

Power Supply
EMI Filter
R/L1 S/L2
U/T1 V/T2
Motor
2-12
FUSE/NFB
Magnetic
contactor
Input AC
Line Reactor
Zero-phase
Reactor
T/L3
+/B1
B2
-
W/T3
Zero-phase
Reactor
Output AC
Line Reactor
Items
Please follow the specific power
Power
supply requirements shown in
supply
Appendix A.
There may be an inrush current
during power up. Please check the
Fuse/NFB
chart of Appendix B and select the
(Optional)
correct fuse with rated current. Use of
an NFB is optional.
Please do not use a Magnetic
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
disturbances. (surges, switching
Input AC spikes, short interruptions, etc.). AC
line reactor should be installed when
Line Reactor
the power supply capacity is 500kVA
(Optional)
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
Zero-phase
audio equipment is 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 the zero phase
reactor. (RF220X00A)
To reduce electromagnetic
EMI filter
interference.
Brake Used to reduce the deceleration time
resistor and of the motor. Please refer to the chart
Brake unit in Appendix B for specific Brake
(Optional) resistors.
Motor surge voltage amplitude
Output AC
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
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11
Explanations