. The street railway review . required to operate the pump in the same ratio as the throt-tling, although the pump maintains a constant speed. The total maximum head pumped against will be 36 ft., but llienormal head will be 26 ft. The friction in the long 48-in. intake,etc., is offset by the siphon effect of the water from the the sewer. This will about balance when the full capacity ofthe pipe and station, which is 40,000 gallons per minute, isreached. Generators and Electrical .\pparatus. The generators are of the General Electric type, three-phase,25 cycle, volt
. The street railway review . required to operate the pump in the same ratio as the throt-tling, although the pump maintains a constant speed. The total maximum head pumped against will be 36 ft., but llienormal head will be 26 ft. The friction in the long 48-in. intake,etc., is offset by the siphon effect of the water from the the sewer. This will about balance when the full capacity ofthe pipe and station, which is 40,000 gallons per minute, isreached. Generators and Electrical .\pparatus. The generators are of the General Electric type, three-phase,25 cycle, volt, with revolving fields. The rating is 3,000 load. There are two i2S-volt continuous current exciters,driven by 200-h. p. induction motors from current furnished bytransformers having 6,600 volts on the primary and giving 350 onthe .secondary coils. A 78-cell storage battery of the ElectricStorage Battery Cos. type H having 60-kw. capacity, located inthe basement, will furnish current for excitation when the indiic-. KIG. n-SECTION OK STnKKItS ,\NI> ASM 11 .\ .\ 1 .N motors cannot be operated, also for lighting, switch testing current when no other is available. It is kept floatingoil the line being cut in between the exciters and switchboard onthe positive and negative busses. The for the excitersas well as for the pumping slalioii are of the General Elec-tric self-cooled type, in .Uh;.. Tlu- i-,s-volt current isused for the switchboard controlling devices and for oil switch.•md battery ami cell switch motors, Cc ilm-ls which were cmbcililfii mthe concrete lloors and Knlleries when they were laiil. They runlo cnrrent and potential Ir,insfnriner>, rheostats, motors, engine ixnal ami control motors, exciter switchboard ap
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
