. The Street railway journal . ngle-pole, double-throw main switches; one lightning switch;one two-way field switch; one potential plug; one pilotlamp; one resistance lamp; two bus wires on the back.(Equalizer switches are furnished, but are located at thegenerator.) Five alternating-current feeder panels, each equippedwith one 200-^mpere, dead-beat, inclined coil ammeter;one 200-ampere, 3500-volt, alternating, three-phase Thorn- May, 1898.] STREET RAILWAY JOURNAL. 273 son recording wattmeter, and two station transformers;three porcelain chamber, high-voltage triple-pole switches;one pilot lam
. The Street railway journal . ngle-pole, double-throw main switches; one lightning switch;one two-way field switch; one potential plug; one pilotlamp; one resistance lamp; two bus wires on the back.(Equalizer switches are furnished, but are located at thegenerator.) Five alternating-current feeder panels, each equippedwith one 200-^mpere, dead-beat, inclined coil ammeter;one 200-ampere, 3500-volt, alternating, three-phase Thorn- May, 1898.] STREET RAILWAY JOURNAL. 273 son recording wattmeter, and two station transformers;three porcelain chamber, high-voltage triple-pole switches;one pilot lamp; six busbars at the back; one indicatingwattmeter, 700 capacity (single-phase type), andthree fuse blocks. Eight special railway feeder panels, each equipped withtwo 300-500-ampere, circuit breakers; two 200-ampere,round pattern, Weston ammeters; one pilot lamp; twosingle-pole main switches; two busbars at the back. Two exciter panels, each equipped with one illuminateddial Weston voltmeter; one round pattern Weston am-. FIG. 9 -700 THREE-PHASE GENERATOR meter; one rheostat; two single-pole, double-throw, mainswitches; two single-pole field switches; two busbars atthe back; one automatic circuit breaker. TRANSFORMERS The static transformers employed in this plant are ofthe standard air-blast type, and are twenty-one in number,of 233 capacity each. Six of these are placed in themain station for the purpose of raising the generator volt-age from 3450 to 6900 volts, and the remaining 15 areplaced in the three sub-stations, two containing six, andthe third three. This type of transformer is too well known to need anextended description, although it might be interesting torefer to some of the most important features of its con-struction. The first and greatest aim in the manufacture of anytransformer is to thoroughly insulate the high potentialfrom the low potential windings. This is accomplished inthis transformer by the method of cooling, which ad-mits of a heavy i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
