Delta VFD-B Series

Appendix B Accessories|VFD-B-P Series
B-30 Revision April 2009, SW V1.00
Connected in input circuit
Application 1 Question
When more than one AC motor drive are
connected to the same power, one of them is
ON during operation.
When applying to one of the AC motor drive,
the charge current of capacity may cause
voltage ripple. The AC motor drive may
damage when over current occurs during
operation.
Correct wiring
M1
M2
Mn
reactor
AC motor drive
AC motor drive
AC motor drive
motor
motor
motor
Application 2 Question
Silicon rectifier and AC motor drive is
connected to the same power.
Surges will be generated at the instant of
silicon rectifier switching on/off. These surges
may damage the mains circuit.
Correct wiring
DC
power
reactor
reactor
AC motor drive
motor
silicon rectifier