gfci tripped by variable speed drive
gfci tripped by variable speed drive
(OP)
I have a variable speed drive that operates on 120 VAC single phase in order to drive a three phase motor as an output.
However this drive trips GFCI outlets where ever it is plugged in.
PWM changes don't help.
I am contemplating a common mode filter but this seems hard to find in high power ratings. Need 15 Amp capability.
Also considering an isolation transformer.
Any other ideas or comments ??
Thanks
However this drive trips GFCI outlets where ever it is plugged in.
PWM changes don't help.
I am contemplating a common mode filter but this seems hard to find in high power ratings. Need 15 Amp capability.
Also considering an isolation transformer.
Any other ideas or comments ??
Thanks





RE: gfci tripped by variable speed drive
RE: gfci tripped by variable speed drive
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: gfci tripped by variable speed drive
No it only trips the one it's plugged into.
Skoggs, I think you might be right.
Thanks
RE: gfci tripped by variable speed drive
I have the smallest TECO 1ph input unit here in my living room on piece of furniture. Let me try it in the GFI it will eventually be plugged into.... I need a grounded extension cord... I have a grounded extension cord sitting on the coffee table...
Hey! I'm in luck! It doesn't trip the GFI outlet. I really expected it to.
So, as I mentioned, some will work, especially if they're small enough.
Keith Cress
kcress - http://www.flaminsystems.com
RE: gfci tripped by variable speed drive
Was the motor frame grounded when you tried that?
The most current flows through motor capacitance to ground. But only if motor is grounded. Was it?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: gfci tripped by variable speed drive
Keith Cress
kcress - http://www.flaminsystems.com
RE: gfci tripped by variable speed drive
RE: gfci tripped by variable speed drive
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: gfci tripped by variable speed drive
http://www.idea2ic.com/GFI/GFICs.html
Z
RE: gfci tripped by variable speed drive
Awesome page on GFCI history
thanks