Isolation type single-pole double-breakpoint circuit breaker

Abstract

The invention discloses an isolated single-pole double-breakpoint circuit breaker, and the circuit breaker comprises a shell, wiring terminals, a contact system, an operating mechanism and a conductive loop; the wiring terminals comprise a first wiring terminal and a second wiring terminal which are respectively arranged at two ends of the shell; a first static contact, a first moving contact, a second moving contact, a second static contact and a second wiring terminal are sequentially connected behind the first wiring terminal to form a conductive loop, and an insulating partition plate is arranged on the longitudinal section in the shell and divides the interior of the shell into a first cavity and a second cavity which are isolated from each other; the first wiring terminal, the first static contact and the first moving contact are arranged in the first cavity, and the second moving contact, the second static contact and the second wiring terminal are arranged in the second cavity; and the operation structure is installed in the first cavity or the second cavity. The double breakpoints are arranged in the two spaces which are completely insulated from each other in a staggered mode, temperature rise is low, the opening speed is high, and complete arc isolation is achieved.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to an isolated single-pole double-break point circuit breaker. Background technique [0002] The traditional double break point circuit breaker design mainly has the following three forms: [0003] Fork-shaped double breakpoint circuit breaker, two breakpoints are arranged side by side in two parallel spaces, and the opening direction is the same. In this way, the contacts are densely distributed, the temperature is concentrated, it is easy to generate heat, the temperature rises, and the safety hazard is high; [0004] Wing-shaped double-break point circuit breaker uses the same moving contact conductor to realize connection with two static contacts through rotation. The arc isolation effect between the two break points in this way is not good, and it is easy to break down and cause a short circuit; [0005] The bridge-shaped double-break point circuit breaker uses the same moving ...

AI Technical Summary

Problems solved by technology

[0003] Fork-shaped double breakpoint circuit breaker, two breakpoints are arranged side by side in two parallel spaces, and the opening direction is the same. In this way, the contacts are densely distributed, the temperature is concentrated, it is easy to generate heat, the temperature rises, and the safety hazard is high;

[0004] Wing-shaped double-break point circuit breaker uses the same moving contact conductor to realize connection with two static contacts through rotation. The arc isolation effect between the two break points in this way is not good, and it is easy to break down and cause a short circuit;

[0005] Bridge-shaped double-break point circuit breaker uses the same moving contact conductor to realize connection with two static contacts through equal movement. This method has a slow opening speed and has a great impact on the breaking effect

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