Analysis for current transformers standardTANG Guo-ming, QIN Fu-xiang, LIU Chong-gao National Institute of Measurement and Testing Technology,Chengdu 610021 ,ChinaAbstract:Current transformers are widely used in electric system. In this passage, the authors only analyzed the verification and check procedure of current transformers, which were used in measurement of electricity. On the basis of having defined the related technical terms, they analyzed the method of checking to current transformers and established the mathematical model to measuring the ratio error ＆ phase displacement of current transformers. Take the class 0.2S of current transformers for example, they analyzed the data under rated current 1%.5%.20%. 100%.120%,then completed the corresponding measurement uncertainty evaluation.[著者文摘]