Electrical news and engineering . art the synchronous motor, the other machine can onlydeliver half of the plant capacity; therefore half the feederline section is sufficient for the purpose. The characteristics of these motors have been such thatthey have successfully kept in step in spite of various shortcircuits and grounds which have occurred during the year,ami only one shut down was experienced during twelvemonths of operation. Voltage Regulation The Tirrill regulator which was used in connection withthe generators had not given satisfaction as the whole sys-tem was subject to heavy fluc
Electrical news and engineering . art the synchronous motor, the other machine can onlydeliver half of the plant capacity; therefore half the feederline section is sufficient for the purpose. The characteristics of these motors have been such thatthey have successfully kept in step in spite of various shortcircuits and grounds which have occurred during the year,ami only one shut down was experienced during twelvemonths of operation. Voltage Regulation The Tirrill regulator which was used in connection withthe generators had not given satisfaction as the whole sys-tem was subject to heavy fluctuation due to a couple of steelfurnaces operated by the Canadian Brakeshoe Company; andii was found almost impossible to 1 ep the regulator in opera-tion during the breaking of the charge on these steel furnaces. This Tirrill regulator was then removed and installed inconnection with the motor-generatoi set exciter at this dis-tributing station and installing of the switching apparatus? I i. >r the synchn >m ms moti Showing the two synchronous motors in operation The series element of this regulator is connected to thesteel furnace circuit, and the regulator is acting upon thesynchronous motor exciter and is maintaining a constantvoltage bj varying the power-factor on the bus-bars. Thetwo voltage charts will show what the voltage was before thechange and after. Horse Power Recovered After the above mentioned change was made, the Fron-tenac Street power house was in position to deliver 1,940 kwat eighty-eight per cent, power-factor with 300 amperes onthe machine; and the Rock Forest plant has carriedkw. at ninety per cent, power-factor with !i amperes permachine. This means that during nine months of the year1918 the corporation was in position to sell a one demand by the manufacturers of shells, without addingany machinery to their power houses, but simply by makinguse of two old generators, at an expense of approximately$2,000 covering the removing of
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