Arc extinguishing chamber for isolation breaker and isolation breaker comprising same

Abstract

The invention provides an arc extinguishing chamber for an isolation breaker and the isolation breaker comprising the arc extinguishing chamber. The isolation breaker comprises the arc extinguishing chamber. A main static contact, a main moving contact, a static arc contact and a moving arc contact are correspondingly arranged in the arc extinguishing chamber in the up-down direction. When the isolation breaker is switched off, the main static contact and the static arc contact are located above the corresponding main moving contact and the corresponding moving arc contact, and the static arc contact and the moving arc contact are located on the inner side of the main static contact and the inner side of the main moving contact. A shielding case capable of shielding the static arc contact when the isolation breaker is switched off is arranged between the static arc contact and the main static contact. The shielding case is provided with a lower shielding end, and the lower shielding end is located below the static arc contact when the isolation breaker is switched off. Since the shielding case is arranged in the arc extinguishing chamber, the isolation breaker can be used as both a breaker and an isolation switch; the arc extinguishing chamber is simple in structure, convenient to use and capable of effectively lowering the design cost and the manufacturing cost of the isolation breaker, and has no additional requirements for the operation structure of an existing breaker.

Description

technical field [0001] The invention relates to an arc extinguishing chamber for an isolating circuit breaker and an isolating circuit breaker using the arc extinguishing chamber. Background technique [0002] With the continuous improvement of circuit breaker technology and reliability, in order to reduce costs, reduce the use of power equipment, and reduce the area occupied by power stations, when designing power equipment, the isolation function is mostly integrated into the circuit breaker. An isolating circuit breaker that can be used as an isolating switch with an isolating function. [0003] For example, a high-voltage isolation circuit breaker is disclosed in the publication specification of the Chinese invention patent application with the publication number CN101589446A. The moving main contact and moving arc contact inside the arc extinguishing chamber move to realize the operating mechanism of the circuit breaker opening and closing operation. Complete the ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an arc extinguishing chamber for isolating a circuit breaker to solve the problem in the prior art that when the isolation performance of the circuit breaker is realized by driving the moving arc contact with two stop positions during the moving process, the requirements for the operating mechanism of the circuit breaker are relatively high. high technical problem; at the same time, the present invention also provides an isolating circuit breaker using the above-mentioned arc extinguishing chamber

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