Voltage dividing device of ring network cabinet type high-voltage electronic equipment

Abstract

The invention discloses a voltage dividing device of ring network cabinet type high-voltage electronic equipment, which comprises cable T joints and conductive wires, wherein the number of the cable Tjoints is three, each cable T joint is provided with a voltage divider below, each voltage divider is provided with a tail cover below, and the voltage dividers below the three cable T joints are mutually connected through the conductive wires. According to the voltage dividing device of the ring network cabinet type high-voltage electronic equipment, a measuring and monitoring circuit of split phases is arranged on the high voltage side, so that the voltage at the primary side of a current transformer is enabled to be 0, the parasitic current generated by high voltage is thoroughly removed,and the problem of great measurement errors brought about by current waveform deformation due to great voltage difference between the primary and secondary sides of the transformer is reduced; and thethree phases of voltage dividers adopt a star connection method, the common point is not grounded, and high voltage resistance and insulation are achieved. The lightning protection only needs to be carried out between phases, and the protection between the phases and the ground is not considered. The protection level of lightning protection can be reduced.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a voltage dividing device of a ring main unit type high-voltage electronic device. Background technique [0002] The measurement circuit of the original product is at the same potential as the earth. The primary and secondary stages of the current transformer are subjected to high voltage. The primary stage of the transformer is high voltage, and the secondary stage is low voltage. Stages form parasitic currents that affect measurement accuracy. [0003] The original ring network cabinet products, after the star connection, adopt the grounding scheme at the end, which causes the voltage divider to bear a huge lightning strike voltage when lightning strikes, which affects the life of the voltage divider. Contents of the invention [0004] The purpose of the present invention is to provide a voltage dividing device for ring main unit type high-voltage electronic equipmen...

AI Technical Summary

Problems solved by technology

[0002] The measurement circuit of the original product is at the same potential as the earth. The primary and secondary stages of the current transformer are subjected to high voltage. The primary stage of the transformer is high voltage, and the secondary stage is low voltage. The stage forms a parasitic current, which affects the measurement accuracy

[0003] The original ring network cabinet products, after the star connection, adopt the grounding scheme at the end, resulting in the voltage divider being subjected to a huge lightning strike voltage during a lightning strike, which affects the life of the voltage divider

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