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 136
f the latter part n when once set to operate at differ-ent time values i value of the short:Dward continuity of service. CURRENT AND PRESSURE LIMITING DEVICES 1,653 Ques. Describe the time mechanism of a definite timelimit relay. Ans. It consists of an air dash pot, and an air diaphragm… … Fig. 2,309.—Condit type A selective relay, designed for use with circuit breakers whereselective or discriminating action is required. The circuits and connections of this relayare illustrated in fig. 2,307, and its characteristics in fig. 2,308. In construction, therelay consists of a special…
Electrical engineering
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