Delta VFD-B Series

Appendix B Accessories_VFD-B Series
B-34 Revision 10/2005, BE13, SW V4.08
Correct wiring
DC
power
reactor
reactor
AC motor drive
motor
silicon rectifier
Application 3 Question
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 and exceeds 6 times the inverter capacity,
or the mains wiring distance
d 10m.
When power capacity is too large, line impedance
will be small and the charge current will be too large.
That may damage AC motor drive due to higher
rectifier temperature.
Correct wiring
large-capacity
power
reactor
small-capacity
AC motor drive
motor