Delta Electronics VFD-VL manual Saddle on both ends Saddle on one end, Length of motor cable

Appendix B Accessories

1.Use the cable with shielding (double shielding is the best).

2.The shielding on both ends of the motor cable should be grounded with the minimum length and maximum contact area.

3.Remove any paint on metal saddle for good ground contact with the plate and shielding.

Remove any paint on metal saddle for good ground contact with the plate and shielding.

saddle the plate with grounding

Saddle on both ends

Saddle on one end

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:

Revision Nov. 2008, VLE1, SW V1.03 B-37