Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 121
ines are connected between the dynamos tobe started and the bus bars, as shown. When the dy- Dynamo Operation—Direct Current 117 namo to be thro^^n in is up to voltage, the pressures ofthe bus bars and this dynamo must balance, and therecan be no noticeable current flowing through thelamps. If,… … Figure 78 are dark, the polarities of the dynamos are correct forparallel operation. In lieu of the lamps the test can be made by insert-ing one wire from each pole of the d^Tiamo into a cupof water and noting the bubbles that form. If thepolarity is correct the bubbles will form at the samepole of…
Electrical engineering · Electric testing
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