Title :
An Improved Electrothermic Instrument
Author_Institution :
Cornell University, Ithaca, N. Y.
fDate :
5/1/1935 12:00:00 AM
Abstract :
An improved electrothermic instrument for measuring watts, amperes, or volt-amperes, actuated by the thermal expansion of a liquid in a closed system which includes a Bourdon tube, is described in this paper. The new instrument is not subject to the errors inherent in the bimetallic strip type of electrothermic instrument, it has a linear input-deflection characteristic, and its time period may be adjusted readily to any desired value up to at least 60 minutes.
Keywords :
Electric variables measurement; Electrothermal effects; Instruments; Power measurement; Reactive power; Thermal expansion; Torque measurement; Wattmeters;
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
DOI :
10.1109/T-AIEE.1935.5057015
