Switchgear with Shunt trip

[Brownetown]

I have an old switchgear most likely 30years+. It has a shunt trip device tied in with Handel. Every time customer loses power something triggers the Gear to trip.

Problem the ats is tied in after switch gear. Everytime they lose power ATS switches over but never realizes power has been restored due to the gear always going into trip position.

I’ve located an old phase monitor along with a re-set button. I’ve did a little digging and saw that this was a normal years ago having the phase monitor trigger the shunt due to has anyone have experience with this?

 

[jim dungar]

...this was a normal years ago having the phase monitor trigger the shunt due to has anyone have experience ...

I wouldn't say it was normal, but it was not uncommon where a facility running at low voltage or reverse phasing was more of a problem than having no power at all.

There should be no problem with you simply disconnecting the phase monitor from the breaker. But you would want to make sure the breaker actually has a shunt trip and not an under voltage trip.