High-breaking-capacity arc extinguish chamber of circuit breaker

Abstract

The invention discloses a high-breaking-capacity arc extinguish chamber of a circuit breaker. The high-breaking-capacity arc extinguish chamber comprises a first shell, a second shell, an arc starting piece, a first arc extinguish gate sheet, a second arc extinguish gate sheet, a third arc extinguish gate sheet, wherein the first shell and the second shell have structures as mirror images of each other, and an inner cavity of the first shell is provided with a plurality of slots; the lengths of the first arc extinguish gate sheet, the second arc extinguish gate sheet and the third arc extinguish gate sheet gradually increase; the first arc extinguish gate sheet, the second arc extinguish gate sheet and the third arc extinguish gate sheet are inserted into the slots of the first shell, and the arc extinguish gate sheets are gradually increased from top to bottom and then are gradually reduced; and the arc starting piece is arranged in a slot on the top part of the first shell. The high-breaking-capacity arc extinguish chamber of the circuit breaker can realize quick dredging of a gas field and quick extinguish of electric arcs.

Description

technical field [0001] The invention relates to an arc extinguishing system for a circuit breaker. More specifically, it relates to the arc chute of a circuit breaker arc extinguishing system. Background technique [0002] The structure of the arc extinguishing system of the circuit breaker product is directly related to the arc extinguishing performance of the circuit breaker product, and affects the live life, breaking capacity and other electrical characteristics of the product. At present, the arc extinguishing chamber of the circuit breaker mainly includes semi-closed type and fully closed type. The semi-enclosed type is generally used in the traditional single-breakpoint circuit breaker, and the fully-enclosed type is generally used in the high-end double-breakpoint circuit breaker. It is easy to spread around, causing the following three effects: 1) It is not conducive to the gas to blow the arc to the predetermined gas outlet, resulting in the inability to quickly s...

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Problems solved by technology

[0002] The structure of the arc extinguishing system of the circuit breaker product is directly related to the arc extinguishing performance of the circuit breaker product, and affects the live life, breaking capacity and other electrical characteristics of the product. At present, the arc extinguishing chamber of the circuit breaker mainly includes semi-closed type and fully closed type. The semi-enclosed type is generally used in the traditional single-breakpoint circuit breaker, and the fully-enclosed type is generally used in the high-end double-breakpoint circuit breaker. It is easy to spread around, causing the following three effects: 1) It is not conducive to the gas to blow the arc to the predetermined gas outlet, resulting in the inability to quickly strike the arc; 2) The high-pressure gas is easy to cause the shells on both sides to rupture and damage the circuit breaker; 3) It is easy to cause metal particles Splashing, damaging metal structural parts or causing movement jams

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