Check the breaker screw length and threads of the bus bar.
I have seen where either the screw is just slightly too long and bottoms
out or the threads don't go all the way down.
This causes the screw to be able to pass the torque test but in reality
it's not fully applying pressure to the breaker t
Hello, breakers are thermal-magnetic the current heats the breaker; if the
current is high enough for long enough, a solder pot inside melts; this
current and excessive heat causes other breakers to open Are you sure the
string current is less than 80% of the breaker rating and the wire
connecting
Seems to me this has come up before.
With bad breakers as probable cause.
I don’t know if the heat has caused buss damage
Might go for CH or QO breakers instead BR style.
Jay
> On Aug 4, 2022, at 8:08 PM, Jerry Shafer via RE-wrenches
> wrote:
>
>
> Jason
> Is the installation designed fo
Jason
Is the installation designed for 208 as you have greater limitations then
240, so now replace the buss and all the breakers, after that run currents
tests and see what you have. I had a 3 phase that the tin cam off the buss
and looked like a plazma cutter due to the exposed aluminum
Fun times
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