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 362
e deflection with about two amperes inthe current coils. The normal capacity of the instrument is1.5 kilowatts, or 10 amperes at 150 volts, as shown on theupper scale. A voltmeter of the direct-deflection electrodynamometertype is shown in Fig. 35, showing the construction of the instru-ment made… … Fig. 36. Movable Eleniont inKey.stone Voltmeter 326 ELECTRICAL MEASUREMENTS 31 ELECTROMETERS Principle of Action. Electrometers depend upon the attractionbetween electrostatic charges of opposite signs. Two metallicplates, connected to a source of potential, will take charges propor-tional to the…
Electrical engineering
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