I've only used a one brand, Sq D and it was a QO style breaker with a unit on the side which required a neutral and a hot from a switch. In my case a panic button that shut a whole panel down. Pretty simple to install. I doubt you can make a regular breaker into a shunt trip. This breaker went bad, 100 amp 3 pole and it cost 300 bucks,used, , had to have it overnighted from California. It was the only thing my supplier could find at 4 pm in the afternoon and we needed it yesterday
I'm not a big fan of shunt trips, as they require power to operate. In the small, molded-case breakers, they require another pole space in the panel, which could usually be better utilized. The field installed trip units are just a little magnet coil, with short leads, that "coerce" the C/B's magnetic trip.
Like Bob says, I haven't seen them used on elevators recently.
(What would happen if Ella Fitzgerald married Darth Vader?? She'd become Ella Vader) Let the boos and rotten tomatoes fly. ...S
Re: shunt trip#36817 04/16/0409:05 AM04/16/0409:05 AM
On the elevator issue. NFPA 70 and 72 tell us "if" your going to do it here is how it needs to be done. In my area the last call has always been left to the elevator inspector. My first call is to the elevator inspector for any given jurisdiction to see what he says regardless of what the F.A. drawings say on new installs. I have never liked the idea of shunting the power since it could leave people in the car between floors. To me that has always seemed to be a major life safety issue.
there is the other area i use the shunt breakers is the gas staion area. [ this is more common with older system ] and anyone hit the e stop button aka panic button it will shut off the gas pumps off [that have seperate breaker box for it or add shunt breakers as needed],
as far for the elevators, i know few place did have shunt trips. but as far i work on it i haven't deal with it for quite a while so i dont know if the local codes have diffrent addmentdent[changes] over the state and national codes .
and the other area i try to think they use the shunt trips is commercal kitchen they use that too . when the Fire Alarm go off or someone hit the trip button it will shut few appliances off.
for other area i have no idea but maybe other members maybe have some idea here too.
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)