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Circuit breaker with enhanced arc extinguishing chamber

A technology of circuit breaker and arc extinguishing chamber, applied in the field of circuit breakers

Active Publication Date: 2020-09-29
SIEMENS IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Circuit breaker with enhanced arc extinguishing chamber
  • Circuit breaker with enhanced arc extinguishing chamber
  • Circuit breaker with enhanced arc extinguishing chamber

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Embodiment Construction

[0020] To facilitate understanding of the embodiments, principles and features of the present invention, they are described below with reference to the embodiments in the illustrative embodiments. In particular, they are described in the context of an assembly of an arc chamber for a circuit breaker having various components of a strengthening mechanism that enhances the attraction of the arc plates to the arc and will reduce the likelihood of arc escape from the arc plates . The assembly is disposed in an arc chute disposed between the base and the cover of the circuit breaker. Reduced current path means for an arc and arc plate means are provided, the arc plate means being surrounded by a first arc track and a second arc track. Several or all of the arc plates may extend into the free area below the arc plates to further provide the required current confinement capability. The arc geometry can have multiple narrow sections to create hot spots. A method of enhancing arc ex...

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Abstract

The invention relates to a circuit breaker with an enhanced arc extinguishing chamber. The circuit breaker comprises an arc interruption mechanism that would enhance arc attraction to arc plates and would reduce the possibilities of an arc escaping from the arc plates. The arc interruption mechanism includes an enhanced arc extinguishing chamber. The arc extinguishing chamber includes a pluralityof arc plates having first and second sides. The circuit breaker further comprises a stationary contact plate that includes a first arc runner disposed near the first side of the plurality of arc plates. The circuit breaker further comprises a load terminal that includes a second arc runner disposed near the second side of the plurality of arc plates. As an arc is attracted by the plurality of arcplates and the arc enters the plurality of arc plates, a length of a current path associated with the arc is reduced through the first arc runner and the second arc runner by reducing a resistance ofthe current path for the arc or by reducing a voltage across the circuit breaker.

Description

technical field [0001] Aspects of the invention relate generally to a circuit breaker having an arc chute. Background technique [0002] Recent developments in electronically tripped residential circuit breakers have created a need for arc interruption mechanisms that accommodate small contact separation gaps and can reduce arc corrosion / contamination of electronic components. Among the options, an arc stack with arc plates was chosen for its additional current limiting capability and ability to operate in both AC and DC applications. The arc plates are usually made of ferromagnetic material, such as steel, and thus attract the arc with electromagnetic force. Once the arc enters the arc plates, it splits into multiple smaller arcs and the arc voltage can increase significantly due to the additional arc anode-cathode pairs generated by the plates. Current limitation is thus achieved by the high arc voltage, and the arc can be trapped within the plate to reduce corrosion to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
CPCH01H73/18H01H9/34H01H9/46H01H9/36H01H33/182H01H33/72H01H71/12
Inventor 雷登·杰·基姆杨光
Owner SIEMENS IND INC
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