Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 216
Connectionto Relay wjieiiAutomatic Fig. 354.—Connections for a solenoid-operated oil switch control with signal lamps. A isthe closing and B the opening solenoid. Auxiliary switch, S, is used automatically to cut outof circuit the coil last operated and insert the other so that it will respond when… … Fig. 355.—Connections for interlocking two solenoid-operated switches. Solenoids Aiand Aa close, and Bi and B2 open their respective oil switches. The operation of the openingcoil A moves the auxiliary switch S to the left (a side), and the operation of the closing coil Bmoves it to the right…
Electric wiring
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