Delta Electronics VFD-M Series User Manual page 154

Application 2
Silicon rectifier and AC motor drive
are connected to the same power.
Correct wiring
Used to improve the input power factor, to
reduce harmonics and provide protection
from AC line disturbances (surges, switching
spikes, short interruptions, etc.). The 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
Correct wiring
large-capacity
power
Revision May 2008, ME14, SW V3.04
power
Application 3
≤
10m.
reactor
Switching spikes will be generated when the silicon
rectifier switches on/off. These spikes may damage the
mains circuit.
Silicon Controlled Rectifier
reactor
AC motor drive
reactor
When the mains power capacity is too large,
line impedance will be small and the charge
current will be too high. This may damage AC
motor drive due to higher rectifier
temperature.
small-capacity
AC motor drive
Appendix B Accessories|
Question
DC
motor
Question
motor
B-9