. Electric railway journal . NEW PUBLIC SERVICE POWER PLANT—SIMPLIFIED DIAGRAM OFMAIN CIRCUITS mentioned. The scheme of connection of this equipmentis as shown in the accompanying electric circuit dia-gram, in which the important pieces of equipment arerepresented by conventional symbols. The switchingequipment is laid out to give the maximum of flexibility,allowing for easy transfer of groups of feeders from onegenerator to another, the isolation of generators orgroups of feeders, and the paralleling of generators andfeeders, all with minimum risk to the plant throughthe effects of short-circ
. Electric railway journal . NEW PUBLIC SERVICE POWER PLANT—SIMPLIFIED DIAGRAM OFMAIN CIRCUITS mentioned. The scheme of connection of this equipmentis as shown in the accompanying electric circuit dia-gram, in which the important pieces of equipment arerepresented by conventional symbols. The switchingequipment is laid out to give the maximum of flexibility,allowing for easy transfer of groups of feeders from onegenerator to another, the isolation of generators orgroups of feeders, and the paralleling of generators andfeeders, all with minimum risk to the plant throughthe effects of short-circuits. Eventually there will be six group buses with switchesfor connecting any one or more to any one or more gen-erators, and there will be a looped generator tie bus forthe purpose of paralleling the generators. For the pres-ent there will be but two group buses. The route of the power from generators to feedersis this: Generator—generator switch—disconnects—. NEW PUBLIC SERVICE POWER PLANT MAIN CONTROL BOARD ON SIXTH FLOOR OF SWITCH HOUSE bus selector switch—group bus (through disconnects oneach side of switch)—feeder selector switch—feederswitch—reactor—feeder line. Between the generatorsand the tie bus will eventually be the current-limitingreactors shown in the diagram which will be installedthis year. Electrolytic lighting arresters, with horngaps, are installed on all feeders and also on the gen-erator buses. Typical views of the switching and bus equipmentsare shown in the accompanying illustrations. Theswitches are solenoid operated. The generator selectorswitches are non-automatic, but the others are providedwith relays respectively as follows: Generator mainoil switches, reverse power relays operating on full loadpower reversal; tie-bus switches, inverse selective over-load relays with high time setting, operating only incase a short-circuit is not opened by the feeder orfeeder-selector oil switches; feeder-selector oil
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
