JCM, We use these(Quick-Lag) breakers in some types of Gael switchboards over here in NZ. Just can't remember who makes them off-hand, but I can find out for you at work tommorrow!. These are rated 400/230 and I don't think that they are UL listed either. BTW, welcome to ECN!!.
Re: looking for miniature circuit breaker#137023 05/22/0307:05 AM05/22/0307:05 AM
Thank you for your comments. However let me bring you additional information:The three-phase, four-wire power system I´m speaking is neither the " center-tap grounded delta" nor the " center-tap grounded open delta" but the " grounded Wye" as showed in the following address: http://home.att.net/~benmiller/elecsys.htm
As you realize the phase to ground voltage is 120 volts, not 208 volts.
Would you please bring me your additional concept after having clarified this point?
Re: looking for miniature circuit breaker#137026 05/23/0304:16 AM05/23/0304:16 AM
JCM, In this particular case, I don't think that voltage comes into it. As long as the voltage of the unit is above the voltage of the system in use. 3 pole breakers are generally supposed to trip if one of the poles break. It shouldn't really matter what sort of system that this is done under!.
Re: looking for miniature circuit breaker#137027 05/24/0307:03 AM05/24/0307:03 AM