1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
t ' •) II machines, for supplying the demand during the day and later part cf the evening, the remainder of the machines being called into requisition only for a short time. Provision must be made for sufficient reserve of plant, so that the breakdown of one or more sets will not cripple the output of the station. Assuming current to be supplied at about 460 volts by different and separate steam dynamos, Dyi, Dy2 (fig. 2), the machines are connected through proper amperemeters and voltmeters with omnibus bars, Oi, …
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- Vol. 9, pp. 192-192