Shunt trip breaker question

[weressl]

Yeah! See Bob, it's not just me.

Yeah, but do you really want to be in THAT company?

 

[zog]

Yeah, but do you really want to be in THAT company?

Sure do, we don't always agree but I enjoy your posts and have learned some things from you.

 

[Cold Fusion]

Well, the one I was talking about is a 3p 225a breaker for one of several sub-panels in a switchgear. ---

I'm fairly sure that branch-circuit-sized ST breakers do have integral contacts in series with the trip coil, but the one I'm talking about clearly did not. I can find out the type tomorrow. I kept it in case I ever need one without the ST.

I can't tell you about branch circuit CBs with ST coils. Probably the smallest I have ever dealt with is about the size of the one you have.

cf

 

[LarryFine]

The original one was an ITE, the replacement a Siemens. The breaker number is QJ23B225001S01, the shunt-trip accessory number is S01QJOR3.

The wiring diagram on the side of the case says, in part: "Caution: Auxiliary switch must be connected in series with the shunt trip" and shows a diagram.

 

[iwire]

Electricity is electricity. MV voltage is distribution not just generation and transmission.

No kidding, that was why I put a at the end of my statement. :smile:

The solenoids CAN NOT BE LEFT CONTINUALLY ENERGIZED

I never said or meant to imply otherwise. :smile:

 

[iwire]

Yeah! See Bob, it's not just me.

I know, I am sorry for that. :grin: