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 79
Pig. 2.217.—Horn break sv.itch. In operation, the arc formed at break, will travel towardthe extremities of the horns because of the fact that a circuit will tend to move so as toembrace the largest possible number of lines of force set up by it. Hence, the arc thatstarts between the horns where… … Fig. 2,218.—Westinghouse rear connected motor starting switch, for pressures up to 600volts. It is used for starting rotary converters and direct current motors of large capac-ity having starting torque small enough to permit cutting out the starting resistance infew steps. The clips can be…
Electrical engineering
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