Delta VFD-E Series Drive
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May 04, 2022 5:27 am
How can resolve problem GFF Ground fault in delta VFD E series drive ?
1 Reply
May 04, 2022 5:27 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.
