The Study Of Synthetical Test Mutual Inductor

The traditional test method of CT and PT are sumed-up and deficiencies are pointed out in this paper. Several new test methods of CT are discussed, the current method is fixed as the new method to test the CT by theoretic analysis. The CT voltage-current characteristic test method and 10% error curve effect are analysed in detail. The test instrument which can make polarity validation, ratio account and voltage-current characteristic test will be studied in this paper by investigation and discussion. The test instrument can predigest the test job of mutual inductor, enhance the precision of mutual inductor test, improve the valid operation of power system relay protection instrument. A new design idea of synthetical CT test instrument is put forward by study on referrence and test instrument in existence in this paper. The generalization of the new test method and instrument will facility the test of power mutual inductor greatly and enhance the power system productivity.