Delta HES Series Instructions For Use Manual page 219

Appendix B Optional AccessoriesHES Series
Application 3
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
Question
When power capacity is too large, line impedance will be small and the charge current will be too
large. That may damage Hybrid Servo Controller due to higher rectifier temperature.
Correct wiring
Large-capacity
Power Supply
 10m.
Low-capacity
Hybrid Servo Controller
Reactor
B-6
Mot or