Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 140
Fig. 135.—Circuit breaker with auxiliary carbon contacts. advantage that by their means a comparatively high resistanceis inserted in the circuit and the current is reduced before thecircuit is broken. 137. Blow-out Coils.—If the conductor ab, Fig. 136, is carrying … Fig. 136.—Principle of the blow-out coil. current and is in the magnetic field NS, it is acted on by a forcewhich, according to the left-hand rule, page 7, tends to move itupward. If ab is an arc formed between two contacts x and yas they are separated, this arc will be forced upward and will 116…
Electrical engineering
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