Large through-flow frequency division and current-distribution type separator

Abstract

A large through-flow frequency division and current-distribution type separator comprises a separator body and a current-distribution device arranged outside the separator body and connected in parallel with the separator body, wherein the separator body comprises an upper wiring terminal (8A), a low wiring terminal (8B), a frequency division element (1), a disjunction skeleton (2), a current sensing element (3), an opening-explosion element (4); the current-distribution device comprises an upper run-off plate (5A), a low run-off plate (5B), an upper connecting guide plunger (6A), a low connecting guide plunger (6B), an upper current-distribution ball (7A) and a low current-distribution ball (7B); and the discharging surfaces of the upper current-distribution ball (7A) and the low current-distribution ball (7B) are in a hemispheroid structure and are relatively separated to form a discharging space. The large through-flow frequency division and current-distribution type separator can satisfy the application of a super-high voltage system, reliably bear the operation overcurrent of a super-high voltage system without electrode wear, damage or mistaken deionization, quickly and reliably act in a small power current, and realize the reliable operation without maintenance for a super-high voltage lightning arrester.

Description

【Technical field】 [0001] The invention relates to a release device for a metal oxide lightning arrester. In particular, it refers to a large-flow frequency-division splitter. 【Background technique】 [0002] At present, the conventional hot-melt and hot-explosive disconnectors at home and abroad have the problem of low current tolerance. Generally, they can only withstand the operating impact current of the ≤35kV system, and rarely can withstand the operating impact current of the 110-220kV system. And it is very easy to have high false action rate or unreliable action separation. The Chinese patent "New type frequency division and shunt type disconnector" (Patent No.: ZL 2006 2 0014946.4) includes frequency division elements, current shunt elements, upper and lower electrodes, current sensing elements and detonation elements. The frequency division elements and current shunt elements , the current sensing element and the detonating element are connected in series with the ...

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Problems solved by technology

The Chinese patent "New type frequency division and shunt type disconnector" (Patent No.: ZL 2006 2 0014946.4), including frequency division element, current shunt element, upper and lower electrodes, current sensing element and detonation element, said frequency division element, shunt element , the current sensing element and the detonating element are connected in series with the upper and lower electrodes respectively, realizing the current flow problems such as ≤220kV system operation shock current tolerance; and through 20 times of 2000A large flow square wave shock current tolerance, to achieve The basic requirements for the operation of ultra-high voltage systems such as 500kV are met; however, after 20 times of 2000A large-flow square wave impulse current tests, the discharge electrode will appear obvious ablation phenomenon, the reliability is questioned, and it is difficult to achieve maintenance-free operation

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