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 168
n has the ad-vantage that the burning out of one transformer does 164 Operating and Testing not seriously affect the operation of the other two, andeven when two transformers fail the third will stilloperate on one phase. This is not the case with thestar connection, one transformer failing… … i i ^ z il r^DO^ ? I i Figure 115 delta connection. Suppose the current be as shownby the curves under 1 at the left. At this instantphase A is at zero, and B is negative and equal to Cpositive. This leaves SI without current for an in-stant and S2 and 3 in series taking the voltage of twophases.…
Electrical engineering · Electric testing
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