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Variable Frequency Drive 3

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design2003

design2003

Electrical
Joined
Jul 8, 2003
Messages
3
Location
US
Can any of you make comments on the following experience that I had with <5.0 HP Variable Frequency Drive?

Supply breaker to Toshiba G7 Inverter in a crane application tripped and blew 20 amp supply fuses (all 3 -phases). The breaker is upstreams of the fuses. At the time, the drive was energized but idle (i.e input, but no output). This happened twice in one week period. I ended up replacing the G7s with an S9 drive.

Thanks.

 
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Suggestion: It is not clear from the original posting if any TVSSs or input reactors are being applied.
 
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