Design and Implementation of the CT Analyzer on the Basis of the Low Pressure Test Principle

Abstract

CT analyzer is a necessary instrument of on-site verification accuracy of current transformer. Traditional current transformer testing methods is mainly the differential method. Because of the limited by the principle, the current transformer of the on-site verification is very inconvenient. The CT analyzer designed and developed in this paper use the new method of indirect test - low pressure method, which gets current transformer contrast and angle difference by measuring the internal parameters of the CT. According to the design method of intelligent instrument, by combining with the digital sampling technology, taking DSP microprocessor as the core, and using the advanced digital signal processing method, use only one instrument current transformer can be realize the field test, which effectively resolve the problems of current transformer field test.