Isolation type bipolar double-breakpoint circuit breaker

Abstract

The invention discloses an isolated bipolar double-breakpoint circuit breaker, which comprises a shell, a wiring terminal, a contact system, an operating mechanism and a conductive loop, and is characterized in that an insulating partition plate is arranged on a longitudinal section in the shell and divides the interior of the shell into a first chamber and a second chamber which are insulated from each other; a conductive loop is arranged in each of the first chamber and the second chamber, and the two conductive loops are not communicated with each other; the conductive loop comprises a first wiring terminal, a second wiring terminal, a static contact and a moving contact, wherein the first wiring terminal and the second wiring terminal are arranged at the two ends of the shell. The operation structure is installed in the first cavity or the second cavity, and the operation structure controls the moving contact to enable the two conductive loops to be connected or disconnected at the same time. According to the invention, the two circuits are arranged in the two spaces which are completely insulated from each other, and the two breakpoints are arranged in a staggered manner, so that the temperature rise is low, the opening speed is high, and complete arc isolation is realized.

Description

Technical field [0001] The present invention relates to the field of circuit breakers, and more particularly to an isolation bipolar double breakpoint circuit breaker. Background technique [0002] Traditional bipolar double breakpoint circuit breaker design mainly has the following three forms: [0003] The fork double breakpoint circuit breaker, two breakpoints are listed in two concurrent spaces, the opening direction is the same, the contact distribution is intensive, the temperature is concentrated, easy to heat, high temperature, high safety hazard; [0004] The wing double breakpoint circuit breaker is connected to two static contacts by rotation using the same movable contact conductor. The arc isolation effect between the two breakpoints is not good, and it is easy to break through the short circuit; [0005] The bridge double-breakpoint circuit breaker is connected to two static contacts with the same moving contact conductor, which is slow to connect with two static co...

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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