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 356
ligible when the dyna-mometer is used to measure alter-nating currents. For direct cur-rents, the effect of the ^outsidefield is eliminated by reversingthe connections after an obser-vation and taking the mean of the two readings obtained. Theeffect of the earths field may be eliminated if the… … Fig. 27. TERMIN/ILDiagram of Arrangement of Coils inSiemens Dynamometer 320 ELECTRICAL MEASUREMENTS 25 balances operate by the mutual attraction and repulsion of fixedand movable coils carrying current, these mutual forces beingmeasured by adjusting the position of a weight on a lever arm,Fig. 28,…
Electrical engineering
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