Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 125
a circuit openingrelay is to open the auxiliary circuit, usually alternating current, 1,644 HAWKINS ELECTRICITY and thereby cause the oil switch or circuit breaker to be opened bythe use of a trip coil in the secondary of a current transformer, orby low voltage release coil. The trip coil of the… … TRIP COIL MAIN CIRCUIT Fig. 2.252.—Diagram illustrating the operation of a circuit opening relay. When the relaycontacts are in the normal closed position, as shown, the cc rcnited. When the predetermined abnormal condition is reached in the main circuit, the relay contacts areopened with a quick…
Electrical engineering
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