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 143
us or time limit types areoften connected to the secondaries of current and of pressure trans-formers to indicate by lamp or bell any trouble that may occur in thegenerator circuit. These relays operate with a low current reversal at full pressure andconversely with a proportionally greater current… … TO 8ELL fTTl Fig. 2.330.—Diagram showing two phase motor or feeder circuit protected by double poledouble coil, overload circuit breaker (or two single pole breakers interlocked) with bellalarm switch. Specifications sometimes call for automatic generator circuitbreakers: in this case definite time…
Electrical engineering
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