High voltage large capcity breaker

A large-capacity, circuit breaker technology, applied in high-voltage air circuit breakers, circuits, high-voltage/high-current switches, etc., can solve problems that are difficult to deal with, and achieve the effect of simple structure, good insulation, and high insulation withstand voltage
CN1728312AInactive Publication Date: 2006-02-01JAPAN AE POWER SYST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JAPAN AE POWER SYST
Publication Date
2006-02-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

PROBLEM TO BE SOLVED: To provide a small-sized high voltage circuit breaker with large capacity, of which rated current is increased in coping with recent requirement of a power system, which can have large capacity and capable of being used in high voltage.SOLUTION: First, a third switching part 3 is opened, and a current to be broken is made to flow through a serial connection part of a first switching part 1 and a second switching part 2. Next, the current is broken by separating electrodes of a vacuum breaking part constituting the first switching part 1 from each other with a prescribed distance, and it is made to withstand transient oscillatory voltage impressed between the electrodes. Afterwards, for example, after a maximum arc period after the distance between the electrodes of the first switching part 1 gets into a prescribed distance, the second switching part 2 is opened, and made to withstand the more severe impulse voltage.
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Description

technical field

[0001] The present invention relates to a high-voltage large-capacity circuit breaker using a vacuum interrupter. Background technique

[0002] At present, the high-voltage large-capacity circuit breaker of the power system, SF 6 Gas circuit breakers come out on top. Vacuum interrupters are often used in other applications, but in terms of interrupting characteristics, it is known that since the distance between the electrodes in vacuum cannot be too large, the withstand voltage against lightning strikes after the current is interrupted cannot be increased. The high voltage that can be achieved is limited; in addition, because the electrodes that are energized under normal conditions are placed in a vacuum and are in a butt contact state, the heat generated by the energization is only dissipated through heat conduction, and it is used as a small and medium-sized current with a small capacity. circuit breaker.

[0003] In addition, as a circuit breaker comb...

Claims

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