Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 140
withthe contact a. When this switch is opened, the contact a is thefirst to be broken, but the circuit is not interrupted since currentcan still pass through the contact d. This latter contact is broken 114 Art. 137] HAND-OPERATED FACE PLATE STARTERS 115 when the switch opens further, and an arc is… … 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
Electrical engineering
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