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Vacuum arc extinguish chamber capacitive treating method and device

A vacuum interrupter and capacitive technology, applied in the direction of high-voltage air circuit breakers, electrical components, electrical switches, etc., can solve the problems of expensive and large systems, and achieve the effects of low cost, reduced re-ignition rate, and simple structure

Active Publication Date: 2011-06-22
中国振华电子集团宇光电工有限公司(国营第七七一厂)
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Problems solved by technology

The capacitive current burn-in device used by foreign companies is usually a low-frequency (5Hz) AC system, which uses a half-wave DC to burn-in the contacts of the interrupter, which can output a current of 5kA. The system is huge and expensive.

Method used

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  • Vacuum arc extinguish chamber capacitive treating method and device
  • Vacuum arc extinguish chamber capacitive treating method and device

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Embodiment

[0015] A capacitive aging method for a vacuum interrupter, which is characterized in that the aging of the vacuum interrupter in the low-current arcing state is carried out through the transient current generated after the capacitor is discharged, and the vacuum arc-extinguishing in the closed state chamber for simulating actual inrush currents. The small current arcing state of the vacuum interrupter is that the auxiliary power supply of 50V~80V is rectified by the rectifier diode, and then the vacuum interrupter in the closed state is turned on, and then the contact of the vacuum interrupter is opened by 1mm~ through the operating mechanism. 10mm distance to achieve. The capacitor is charged after being rectified by the main power supply of 150V to 250V through a rectifier diode.

[0016] A kind of vacuum interrupter capacitive aging device that realizes the above method, such as figure 1 As shown, it is characterized in that it includes a capacitor 6 connected in parallel...

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Abstract

The invention discloses vacuum arc extinguish chamber capacitive treating method and device. The method is characterized by comprising the following steps: treating an arc extinguish chamber in a small current arcing state through instant current generated after a capacitor discharges electricity; and simulating the actual flashy flow of the vacuum arc extinguish chamber in a closed state. The method and the device ensure that the heat penetration depth of contact treatment of the vacuum arc extinguish chamber is deeper, so the restriking rate and non-sustained disruptive discharge (NSDD) phenomenon of the vacuum arc extinguish chamber can be effectively reduced, the structure is simple, and the cost is lower.

Description

technical field [0001] The invention relates to a capacitive aging method and device for a vacuum interrupter, belonging to the technical field of vacuum switches. Background technique [0002] Vacuum switches are widely used in the medium voltage field due to their small size, long life, reliable short-circuit current breaking, and maintenance-free or less maintenance. However, the problem of high reflashing rate of switched capacitors is also very prominent, and accidents are frequent every year. In order to reduce the reignition rate of vacuum switching capacitor banks, various vacuum interrupter and vacuum switch manufacturers, power departments, and scientific research institutes have done a lot of work. For this reason, the country has also raised the standard from C1 to C2. In order to meet the C2 level standard, it is a common practice of foreign companies to use capacitive current to age the vacuum interrupter to reduce the reflashing rate of switching capacitor ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/00H01H33/66
Inventor 张毅苏平
Owner 中国振华电子集团宇光电工有限公司(国营第七七一厂)
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