220kV SF6 Current Transformers

Technical Parameters for LVQB3-220W(1 3) Current Transformers 1 Rated voltage 220 kV 2 Highest voltage for equipment 252 kV 3 Rated primary current 300A 4000 A 4 Rated secondary current 5A or 1 A 5 Rated frequency 50 (60) Hz 6 20 50VA (If any other rated output required, We can satisfy it.) 7 Accuracy class and accuracy classes combination Steady accuracy classesare 0.2S, 0.2, 0.5S, 0.5, 5P, 10P, PR and PX; transient accuracy classes are TPS, TPX, TPY and TPZ. There are 1 7 pcs secondary windings in a CT. 8 Rated operating pressure of the gas SF6 is 0.40 MPa 9 Minimum operating pressure of the gas SF6 is 0.35 MPa 10 Instrument security factor (FS) of measuring class 5 or 10 11 Accuracy limit factor (ALF) of protective class 5, 10, 15, 20, 30 or 40 12 Rated continuous thermal current Icth 1.2In 13 For rated short-time thermal current Ith (rms) and rated dynamic current Idyn (peak), please see Table 1. Table 1 Primary Current (A)300 8001000 25003000 4000Rated Short-time Thermal Current (rms) (kA), 3s425063Rated Dynamic Current (Peak) (kA)105125158