The Length Of Motor Cable - Delta VFD-B User Manual

Appendix B Accessories|VFD-B Series
Remove any paint on metal saddle for good ground contact with
the plate and shielding.

The length of motor cable

When motor is driven by an AC motor drive of PWM type, the motor terminals will experience
surge voltages easily due to components conversion of AC motor drive and cable capacitance.
When the motor cable is very long (especially for the 460V series), surge voltages may reduce
insulation quality. To prevent this situation, please follow the rules below:
B-10
saddle
Saddle on both ends
Saddle on one end
the plate with grounding
Revision July 2008, BE16, SW V4.08 & V5.00