Gupta, S. R. (2009) Calibration & Measurement Facilities for AC High Current & High Voltage Ratio Standards at NPL. MAPAN - Journal of Metrology Society of India, 24 (1). pp. 29-39. ISSN 0974-9853

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Abstract

Regular calibration of the Instrument Transformers (ITs) is very essential for the accurate measurement of power and energy at high voltages. ITs are also used in the measurement of high currents & high voltages at power frequencies. The nominal transformation Of an IT depends only on the number of turns of its windings but due to various losses there are always errors in the Instrument Transformers' ratios. The correct knowledge of their errors requires calibrations of the ITs. In this paper the methods used in calibrating the Current Transformers (CTs) & Potentia! Transformers (PTs) and the required accuracy have been discussed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to Springer Science+Business Media.
Subjects:	Instruments/ Instrumentation
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	14 Aug 2012 08:07
Last Modified:	14 Aug 2012 08:07
URI:	http://npl.csircentral.net/id/eprint/411

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