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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

Inactive Publication Date: 2006-02-01
JAPAN AE POWER SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this requirement, it is difficult to cope with the current gas circuit breaker

Method used

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  • High voltage large capcity breaker
  • High voltage large capcity breaker
  • High voltage large capcity breaker

Examples

Experimental program
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Embodiment Construction

[0020] Embodiments of the present invention will be described below with reference to the drawings.

[0021] figure 1 It is a single-line wiring diagram of a high-voltage large-capacity circuit breaker showing an embodiment of the present invention.

[0022] The components constituting the high-voltage large-capacity circuit breaker include: a first switch unit 1 ; a second switch unit 2 electrically connected in series with the first switch unit 1 , and a third switch unit 3 electrically connected in parallel with the first switch unit 1 . The first switch unit 1 is constituted by a vacuum interrupter having excellent current interruption characteristics for separating electrodes in a vacuum to interrupt current. On the other hand, the second switch unit 2 has a structure in which the contacts are separated in an insulating medium other than a vacuum, for example, in an insulating gas. After the current cut off by the first switch unit 1, the contacts The head is spaced apa...

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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.

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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Application Information

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IPC IPC(8): H01H33/66H01H33/14H01H33/666
CPCH01H33/143H01H2033/566H01H33/6661H01H2033/6667H01H33/66
Inventor 筑紫正范富士卓司大内茂俊山极时生田中丰一
Owner JAPAN AE POWER SYST
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