REFERENCE POTENTIAL TRANSFORMER IN CASCADE ARRANGEMENT FOR FIELD APPLICATION

Sung-Won Kwon, Jae Kap Jung, Mun-Seog Kim

Abstract

We have developed a series of high stable and accurate potential transformer with cascade arrangement to reduce the size and weight for the on-site calibration and field application. <br />The maximum rated voltages of the PTs were 22 kV, 66 kV and 132 kV with rated burden of 5 VA. The long term stabilities of ratio error of the PTs were less than 0.0033 %, and ratio errors were (-0.0022 ~ + 0.0442) %. The phase angle errors were less than about -3 min and the maximum long term drifts were 0.077 min.

Keywords

cascade arrangement, PT comparator, on-site calibration, potential transformer, ratio errorand phase angle error

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IMEKO-TC4-2011-011.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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