Direct current superposition method measurement circuit
A technology of DC superposition method and measurement circuit, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problems of substation relay misoperation, weak current, instability, etc., to avoid vicious grounding and short-circuit faults, The effect of high accuracy and simple wiring
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[0017] In order for the inventor of the present invention to better understand the technical solutions of the present invention, the following detailed descriptions are given through specific embodiments in conjunction with the accompanying drawings:
[0018] See figure 1 , An embodiment of the present invention, a DC superposition method measurement loop, including a cable X to be tested connected between the load 1 and the busbar of the substation grounding transformer 2, and also includes a DC power supply 3, a first inductor L1, a first Capacitor C1, first surge protector 4, transformer grounding protection circuit, second surge protector 6, low pass filter 7, band stop filter 8, ammeter 9, and relay 10.
[0019] One end of the DC power supply 3, the first inductor L1, the first capacitor C1, and the other end of the DC power supply 3 are sequentially connected; one end of the first surge protector 4 is connected to the connecting end of the first inductor L1 and the first capac...
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