Xian Huayi power plant is the high-voltage electrical equipment backbone enterprises in Jiaxing high voltage transformer, leading products 6-110kV voltage vacuum circuit breaker, low voltage switch cabinet, box-type substation, power transformers, voltage and current transformers, high voltage fuse filter, load switch, disconnecting switch, zinc oxide surge arresters, harmonic elimination and so on. Factors transformer error and the influence of the error (1) CT excitation loss and errors due to magnetic saturation of the impact itself, I1 measured value KNI2 in both numerical and phase difference. Respectively ratio error and angle error. Error factors affect the primary current I1; I1 is small when the error is large. So when I1 = (100-120%) I1e CT error is minimized. Dimensioning and structure; secondary load impedance; power factor; (2) PT error because of the excitation current and the impedance magnitude and phase measurements are error. The same as the ratio error and angle error. Error factors core structure dimensions; the secondary side load; power factor; the primary voltage. Should vary the power factor and a secondary side voltage is limited within a certain range. Hangzhou high voltage transformers, high voltage transformers, power is supplied by the Xi'an Huayi Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!