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 121
h respect to the abnormal conditions which causedthem to operate, as a. Overload; b. Underload; c. Over voltage; d. Ixjw voltage; e. Reverse energy;/. Reverse phase. 6. With respect to the time consumed in performing theirfunction, as a. Instantaneous (so called); b. Definite time limit; c. Inverse… … Pic 2578.—General Electric overload and low votta^ taker for 0 I or less. It has one overload, and ooe low voltage coil as shown. Screens ■belwun contacts, Protective Relays.—These are used to protect circuits fromabnormal conditions of voltage, or curr h would be undesirable or dangerous to the…
Electrical engineering
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