Delta Electronics VFD-S manual B.3.3 Applications for AC Reactor

Appendix B AccessoriesVFD-S Series

B.3.3 Applications for AC Reactor

Connected in input circuit

Application 1	Question
When more than one AC motor drive is	When applying power to one of the AC motor
connected to the same mains power, and one	drive, the charge current of the capacitors
of them is ON during operation.	may cause voltage dip. The AC motor drive
	may be damaged when over current occurs
	during operation.

Correct wiring

M1 reactor

M2

AC motor drive

AC motor drive

motor

motor

Mn

AC motor drive

motor

Application 2		Question
Silicon rectifier and AC motor drive are		Switching spikes will be generated when the
connected to the same power.		silicon rectifier switches on/off. These spikes
		may damage the mains circuit.
Correct wiring		silicon rectifier
power	reactor
		DC
		AC motor drive
	reactor	motor

B-12 Revision August 2008, SE09, SW V2.61