Delta VFD-EL Series Drive
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May 04, 2022 6:53 am
How can resolve problem GFF Ground fault in delta VFD EL series drive ?
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May 04, 2022 6:53 am
Ground fault
When (one of) the output terminal(s) is grounded, short circuit current is more than 50% of AC motor drive rated current, the AC motor drive power module may be damaged.
NOTE: The short circuit protection is provided for AC motor drive protection, not for protection of the user.
1. Check whether the IGBT power module is damaged.
2. Check for possible poor insulation at the output line.
Check drive rectifier & IGBT using multimeter.
Check wiring.
Check drive hardware using multimeter.
