Help with Equitech 1.5Q power conditioner

@jea48 my bad the link has the incorrect image. I'll add mine. The top left is the receptacle that has the reset button. The only devices are the TV, 2 speakers, preamp and amp are all that are plugged into the 1.5Q. none of which are plugged into the gfci plug - those are all plugged into the regular outlets on the back

Oh, now I get it.

GFCI outlets do go bad, but it could also be equipment with a leaky capacitor to ground or a reactive load, which is most likely with bigger motors and amps.

If you find the problem is only your amp, I’d suspect swapping a GFCI won’t help.

Sometimes these trips happen intermittently, so hard to diagnose fully. Of course another alternative is to see if you can trigger any other outlet.  Maybe take the suspect piece of gear to your kitchen counter and see if you can trigger one of those outlets.

Hi @jea48  - Not my first time going through a balanced power system, though it is the first time I've known about GFCI on an example.  I read through your explanation, which is what I remember.  The part that I don't get is how a GFCI, connected to the secondary windings, tripping on a balanced power system would not also trip the kitchen outlet.

As you point out, the ground is not part of the GFCI sensing strategy in either case, but it's the imbalance between the current carrying conductors (which ground should not be except on a fault) which causes the trip.