UHV voltage-sharing capacitor RC device

Abstract

The invention discloses an UHV voltage-sharing capacitor RC device and belongs to the technical field of electrics. The UHV voltage-sharing capacitor RC device comprises a bushing, and a group including a resistor device, a voltage-sharing capacitor core and a compensation device which are successively connected in the bushing. The UHV voltage-sharing capacitor RC device provided by the inventionis connected in parallel with the fracture of a circuit breaker through binding posts, and has a voltage sharing effect during an oscillation process. When the fracture is disconnected, almost all voltages at both ends of the fracture are applied to the voltage-sharing capacitor core of the device, thereby sharing a fracture electric field, accelerating arc extinguishing, rapidly attenuating the high-frequency oscillation inrush current through the resistor device, reducing the impact on the equipment, and being effective in impact-caused malfunction of the high-voltage protection. The devicecan reduce the operating overvoltage generated by the high-voltage circuit, so as to avoid insulation damage to electrical equipment caused by the operating overvoltage.

Description

Technical field [0001] The present invention relates to the technical field of electricity, in particular to a resistance-capacitance device of an ultra-high voltage equalizing capacitor. Background technique [0002] In developed countries such as the United States, Japan, and other developed countries, it is a common way to use vacuum switches and RC absorbers. Due to the peculiarities of my country’s power grids, the imported RC absorbers and domestic RC absorbers produced by foreign standards in the past cannot adapt to the actual situation in my country. Unexplained damage accidents often occur, which leads to the product’s domestic use. The speed of development is far behind the vacuum switch. [0003] In the past, the capacitors used in RC devices were not "protective capacitors". In fact, they were modified on overvoltage protectors. Some used multiple or even hundreds of low-voltage capacitors in series and used them as high-voltage capacitors; some used zinc oxide resisto...

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Problems solved by technology

This is far from meeting the national standard

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