VFD Help

J

Thread Starter

Jameson

I have had 2 VFDs on the same piece of equipment go bad by an apparent
line to line short circuit. It destroyed the line contactor, tripped the motor circuit breaker, the feed circuit breaker, and the main circuit breaker feeding the panel. Motor was meggered line to line, and line to ground with no bad readings. It is now running fine in bypass mode.

Any help would greatly be appreciated.
 
What are the considerations to running multiple - like 2, 4, 6 VFDs from a single generator ?

We have observed that when running even a single VFD from a generator, we typically have to bypass the
input filter - to reduce the overall input impedance thereby avoiding the generator tripping on high kVAr

We are looking at implementing a scenario with 4 30 HP VFDs driven by a 180kW genset.
Any clever trickery required to get everyone to play nice ?
 
What are the considerations to running multiple - like 2, 4, 6 VFDs from a single generator ?

We have observed that when running even a single VFD from a generator, we typically have to bypass the
input filter - to reduce the overall input impedance thereby avoiding the generator tripping on high kVAr

We are looking at implementing a scenario with 4 30 HP VFDs driven by a 180kW genset.
Any clever trickery required to get everyone to play nice ?
A good electrical stability study system would be required.. As this non linear load.. And behavior on transient period can affect a smooth operation.. Can you provide a topology architecture of the studied system.. As there may be something to say about.. Is that daisy scheme used..
 
Jameson....
I suggest you contact the Gen-set supplier or suppliers to determine if their equipment can operate properly when powering VSD/VFD loads!
Regards, Phil Corso
 
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