International Library of Technology · Scranton, International Textbook Co. · leaf 94
dicate the watts directly. Such aninstrument is calledan indicating wattme-ter. Fig. 35 shows aWeston wattmeter ofthe kind referred to.The principle on whichthis wattmeter oper-ates will be understoodby referring to Fig. 3G.Two stationary coils,consisting of a fewturns of heavy wire,as indicated by… … n ELECTRIC TRANSMISSION. 81 springs c, c, which also serve to carry the current into thecoil. The pointer is attached to the axis of the swingingcoil and plays over a horizontal scale. The stationarycoils a, a are connected in series in the circuit, so that thecurrent supplied to the motor or other…
Electrical engineering
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