. The Street railway journal . ,when the breaker isopened, the current isGradually shuntedfrom the current-car-rying contacts to thecarbons by steps ofsuch low resistancethat no arcing can oc-cur until the finalbreak is made on thecarbons. This fea-ture obviates all possi-bility of blistering thecopper or current-carrying contacts. The len gth of break,or opening of the cir-cuit breaker, is proportioned to the voltage of the arc occurs on the carbon terminals above, and is wellremoved from the metal parts. This construction aids thenatural tendency of the arc to rise and prevents a
. The Street railway journal . ,when the breaker isopened, the current isGradually shuntedfrom the current-car-rying contacts to thecarbons by steps ofsuch low resistancethat no arcing can oc-cur until the finalbreak is made on thecarbons. This fea-ture obviates all possi-bility of blistering thecopper or current-carrying contacts. The len gth of break,or opening of the cir-cuit breaker, is proportioned to the voltage of the arc occurs on the carbon terminals above, and is wellremoved from the metal parts. This construction aids thenatural tendency of the arc to rise and prevents any possi-bility of communication of the arc to any live parts belowthe carbon terminals. Each element of the set is providedwith an automatic tripping coil which acts independently ofthe others. As already indicated, this piece of apparatus is closed bymeans of compressed air and it is held in the closed positionby a toggle lock. The valves which are located on the cyl-inders are operated electrically from the controlling sta-.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
