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 195
onable cost. Mercury Type. Alternating-current meters are also built onthe mercujy principle. They are quite similar to the ones for direct-current work. With the alternating-current meters, the line currentis usually passed through the field. The line voltage is steppeddown to a low value by means… … Fig. 42. Westinghouse Polyi^hase Watt-Hour Meter Courtesy of Westinghouse Electric and Manufacturing Company 172 SWITCHBOARDS 75 They are often mounted in glass cases, and when in metal cases,are finished to harmonize with the other equipment of the switch-board. Figs. 42 and 43 show examples of…
Electrical engineering
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