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 493
rol spring tension becomes equal to the moment of theattraction and repulsion between the fixed and moving coils, therelay contact opens and the pen stops. If the voltage falls, theupper relay contact closes and the left-hand solenoid moves the pento the left until the relieved tension of the… … ^30L£NOW S CONTKOL CIRCUIT METEREJ] CIRCUIT Fig. 128. Diagram Illustrating Relay Prinri-ple of Westinghouse Recording Voltmeter 449 152 ELECTRICAL MEASUREMENTS that the meter element can be made fully as accurate and sensitiveelectrically as an indicating meter. On the other hand, as the…
Electrical engineering
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