Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 218
: ci-ChGreen 1 Lamp Fig. 357.—Connections of an interlocking system for two solenoid-operated oil switchesarranged to be tripped by an automatic relay. AUTOMATIC SWITCHES AND CIRCUIT BREAKERS 207 ■j£U^JlS9Udg … I s
Electric wiring
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