Short circuit and open circuit state detection circuit for secondary side winding of current transformer
A technology of current transformer and winding short circuit, applied in electrical winding testing, instruments, measuring electricity, etc., can solve problems such as cost, uneconomical development progress, trouble, etc., and achieve the effect of low cost, accurate detection, and accident prevention.
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[0014] Below in conjunction with the accompanying drawings, the present invention will be further described with specific embodiments, refer to Figure 1-Figure 2 ;
[0015] It should be noted that the "first", "second", "third", "fourth", "sixth", "seventh", "eighth", "third", Terms such as "ninth" do not limit the quantity of the relevant technical features, but are named for the purpose of distinguishing the relevant technical features.
[0016] This embodiment provides a short circuit open state detection circuit of a current transformer, including a signal sampling circuit 2 , a secondary side winding state judgment circuit 4 and a constant current source circuit 1 . The signal sampling circuit 2 includes a sampling resistor R5 connected in parallel with the secondary winding of the current transformer. After a plurality of diodes are connected in series, the anode is connected to the first end of the sampling resistor R5 and the cathode is grounded. The constant curren...
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