Transformers including CT and PT, is a high current, high voltage into a low current, low voltage for each measurement to protect the coil supply electrical equipment to reflect the operating parameters and fault conditions of the electrical equipment. (1) CT is equivalent to a short circuit operation of the transformer secondary winding in series with the metering and protection, rated current of 5A or 1A, allowed to open. Principle one side N1 or less is usually a turn a few turns Xuzhou high voltage transformers, N2 bigger. I1 depends entirely on the primary current (load current) nothing to do with I2 and load changes. This is different from the transformer. Under normal circumstances, the impedance of the second series of instruments and relays the current through the coil is very small, close to the short-circuit state, which is another different point from the power transformer. When the current transformer is working properly, the secondary current of the magnetomotive force generated by the secondary of a magnetomotive force I1N1 I2N2 from demagnetization effect. Therefore, the synthesis of magnetic potential I0N1 and synthetic flux value is not large, the secondary induced emf E2 value does not exceed several tens of volts. (2) PT is equivalent to an open transformer running, secondary and Measurement, Instrumentation voltage coils in parallel high voltage transformers, rated voltage of 100V Taizhou high voltage transformer, and not short-circuit. Principle N1 "N2 Changzhou high voltage transformer secondary impedance is large, almost in no-load state, U2 does not affect U1, and with the changes reflect a voltage U1. Accuracy and rated capacity (1) CT primary current error 100-120% of the rated current of 0.2 0.5 1310 Total 5, Class B for protection level. Output capacity S2e S2e run at rated capacity and Z2e when I2e = I2e2Z2e because I2e = 5A, 1A so S2e Z2e difference with a multiple, S2e can be used instead of the secondary impedance Z2e rated load unit is Ω. (2) PT U1 within the specified range, load rating when COSΦ, U1 = (0.85-1.15) Ue COSΦ = 0.8 when. Maximum voltage error. 0.2,0.5,1,3 divided into a total of four. Zhenjiang high voltage transformer high voltage transformer _ _ Huayi electricity provided by Xian 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!