DocumentCode :
2761166
Title :
Advanced procedures for calibration of instrument transformer burdens
Author :
Draxler, Karel ; Stybliková, Renata ; Ulvr, Michal
Author_Institution :
Fac. of Electr. Eng., Czech Tech. Univ. in Prague, Prague, Czech Republic
fYear :
2011
fDate :
27-30 June 2011
Firstpage :
983
Lastpage :
988
Abstract :
Measurement of electrical power or energy in the area of electroenergetic, power systems and electric drivers is closely linked with use of instrument current or voltage transformers (ICT, IVT). Accuracy of these appliances substantially affects the resulting accuracy of the measurement. An important parameter which affects ICT or IVT accuracy is their burden. Therefore the calibration of instrument transformers (IT) must be performed at a desired value of the burden. It usually varies in the range (1 up to 75) VA. ICT burdens less than 5 VA are usually real or they have the inductive power factor 0.8 for greater values. IVT burdens have usually inductive power factor 0.8. A precise adjusting of the burden is important to achieve required IT calibration accuracy. Burden calibration is a necessary part of the calibration process. Procedures for burden calibration used at CMI are described in the paper. There is described a procedure using a standard transformer test set and also procedures with PC controlled measuring systems.
Keywords :
automatic testing; calibration; instrument transformers; transformer testing; PC controlled measuring system; apparent power 1 VA to 75 VA; electric drivers; electrical power measurement; electroenergetic; instrument transformer burden; instrument transformer calibration; power systems; standard transformer test set; Calibration; Current measurement; Reactive power; Resistors; Uncertainty; Voltage measurement; Voltmeters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics (ISIE), 2011 IEEE International Symposium on
Conference_Location :
Gdansk
ISSN :
Pending
Print_ISBN :
978-1-4244-9310-4
Electronic_ISBN :
Pending
Type :
conf
DOI :
10.1109/ISIE.2011.5984293
Filename :
5984293
Link To Document :
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