Induction voltage divider based method for judging detection error exception of voltage transformer
A technology of inductive voltage divider and voltage transformer, which is applied in the direction of instruments, measuring electric variables, measuring devices, etc., can solve the problems of voltage transformer verification error, standard voltage transformer out-of-tolerance, voltage transformer out-of-tolerance, etc., to achieve The effect of high accuracy level, low cost and small size
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[0047] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0048] Step 1: On the basis of the original wiring, first compare the standard voltage transformer and the induction voltage divider by ( figure 2 )or( image 3 ) connection mode access;
[0049] The second step: calculate the value of the voltage division coefficient K, and set it in the induction voltage divider;
[0050] (1) Suppose the rated primary voltage U of the tested product (when U>35kV):
[0051] K=NkV / U=35kV / U
[0052] When U=220kV, K=0.159;
[0053] When U=110kV, K=0.318;
[0054] (2) Suppose the rated primary voltage U of the tested product (when U<35kV):
[0055] K=U / NkV=U / 35kV
[0056] When U=10kV, K=0.286;
[0057] The third step: calculate the test voltage U t the percentage value of;
[0058] (1) Suppose the rated primary voltage U of the tested product (when U>NkV):
[0059] When U=220kV, U t =NkV / U×100%=35 / 220×100%=15.9%;
[0060]W...
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