DocumentCode :
3773245
Title :
A portable liquid power factor instrument
Author :
M. K. Sambhu
Author_Institution :
Beckman Instruments, Inc., Cedar Grove, N.J.
fYear :
1973
Firstpage :
167
Lastpage :
169
Abstract :
An instrument has been developed which provides a direct reading of the power factor of new and used insulating liquids with accuracy comparable to laboratory types. A unique bridge circuit is employed at fixed high voltage excitation at power line frequency which permits guarded cell measurements to be made, both in the instrument chamber itself or remotely at the end of a guarded shielded cable. The instrument is portable and double shielded to minimize electrostatic interference experienced in power distribution on-site measurements. Dielectric constants can also be determined. Problems involved in maintaining accuracy at high ambient relative humidities are also discussed.
Keywords :
"Bridge circuits","Instruments","Reactive power","Capacitance","Dielectric measurement","Power measurement","Temperature measurement"
Publisher :
ieee
Conference_Titel :
Electrical Insulation Conference, 1973 EIC 11th
Print_ISBN :
978-1-5090-3110-8
Type :
conf
DOI :
10.1109/EIC.1973.7468672
Filename :
7468672
Link To Document :
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