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 122
RESSURE LIMITING DEVICES 1,641 Ques. How do protective relays operate? Ans. They act in combination with automatic circuitbreakers, operating when their predetermined setting has beenreached, energizing the trip coil of the circuit breaker and open-ing the circuit. Fig. 2,279 shows the principles… … vJ&PJ INSTRUMENTPStmm TRANSFORMER Pig. 2.279.—Diagram illustrating the operation of a circuit closing relay. When the prede-termined abnormal condition is reached in the main circuit, the relay closes the auxiliarycircuit, thus energizing the trip coil and opening the breaker. the pivoted…
Electrical engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
