Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 224
Fig. 65. Alternating-Current Time Limit Overload Relay Courtesy of Westinghouse Electric and Manufacturing Company … Fig. 66. Time Limit Overload Relays with Covers RemovedCourtesy of General Electric Company 199 102 SWITCHBOARDS relay is used to protect transformers against trouble in themselves.There are two opposing current coils connected to current transform-ers on both the low and high tension side of the…
Electrical engineering
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