Calibration & measurement facilities for AC high current & high voltage ratio standards at NPL

被引：0
作者：
S. R. Gupta
机构：
[1] National Physical Laboratory,
来源：
MAPAN | 2009年 / 24卷
关键词：
Imaginary Component; Current Transformer; Secondary Current; High Voltage Source; Voltage Transformer;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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) & Potential Transformers (PTs) and the required accuracy have been discussed.
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页码：29 / 39
页数：10
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