Delta VFD-M-D series, Руководство пользователя, Страница: 147 / 163

Appendix B Accessories
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VFD-M-D Series
B-4 Revision Jan. 2007, MDE2, SW V1.05
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:
Use a motor with enhanced insulation.
Connect an output reactor (optional) to the output terminals of the AC motor drive
The length of the cable between AC motor drive and motor should be as short as possible
(10 to 20 m or less)