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 128
tly in series with the line, both on high and low tensioncircuits. Secondary relays receive their current supply from the sec-ondary circuits of current transformers. Alternating current CURRENT AND PRESSURE LIMITING DEVICES 1,647 relays connected to secondary of pressure transformers andrelays… … Fig. 2,301.—Alternating current low voltage circuit closing low voltage relay, for 600 voltsor less. 1 he contacts are similar to those of the circuit closing overload type except thatthey are inverted. As long as the pressure is normal the contact cone is held above thecontacts. When the pressure…
Electrical engineering
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