Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 283
the switch S, Fig. 298, should not be closed until Em is equaland opposite to Eg. If this switch were closed when Em and Egare acting in the same direction round the closed circuit, then theresultant voltage Er would be equal to Em + Eg and would senda destructive current / through the circuit.… … Fig. 298.—Alternator driving Fig. 299.—Alternators in par-a synchronous motor. allel. across the switch S. When the lamp is brightest, then Er =Em + Eg; when darkest, then Er = zero and the switch $ maybe closed, after which the load may be put on the motor. Theoperation described above is called…
Electrical engineering
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