DocumentCode :
1017448
Title :
An Improved Type of D-C Wattmeter of the Shunted Type
Author :
MacGahan, Paul
Author_Institution :
Development engineer in the meter department of Westinghouse Electric and Manufacturing Company, Newark, N. J.
Volume :
60
Issue :
1
fYear :
1941
Firstpage :
4
Lastpage :
7
Abstract :
While wattmeters for high current values of a-c power are universally used in connection with instrument transformers, d-c power is ordinarily measured by using separate ammeters and voltmeters on account of the difficulty in making a heavy-current d-c wattmeter. Although large direct currents are conveniently measured by use of the shunt and millivoltmeter, shunted-type d-c wattmeters have in the past been somewhat unsatis-factory. An improved d-c wattmeter is described which corresponds in accuracy and sensitivity to the usual permanent-magnet moving-coil ammeter and operates from the usual ammeter shunt.
Keywords :
Ammeters; Coils; Current measurement; Electrodynamics; Instruments; Magnetic separation; Magnetic shielding; Power measurement; Tellurium; Wattmeters;
fLanguage :
English
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
Publisher :
ieee
ISSN :
0096-3860
Type :
jour
DOI :
10.1109/T-AIEE.1941.5058188
Filename :
5058188
Link To Document :
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