Bipolar circuit breaker

Abstract

The invention relates to a circuit breaker used for providing overload and short-circuit protection for electric circuits and electrical appliances, in particular relating to a bipolar circuit breaker. The technical scheme provided by the invention is as follows: the bipolar circuit breaker is characterized in that a tripping mechanism comprises a rotating wheel, a tripping frame, a sudden jump frame, a rotating shaft of the sudden jump frame, a spring of the tripping frame, a position-limiting rotating shaft, a tripping plate and a torsion spring, wherein a tension spring is arranged in the rotating wheel and a housing of the tripping mechanism, convex columns are arranged on two sides of the rotating wheel, moving contacts are sheathed on the convex columns, one end of the torsion spring is clamped on the moving contact, and the other end of the torsion spring is clamped on the rotating wheel. By adopting the scheme, the invention provides the novel bipolar circuit breaker which is simple in structure and can enable the pressure between contact points to meet the requirements of the circuit breaker in circuit environments with different current intensities; and furthermore, the tripping force of the tripping mechanism does not change, the sensitivity of the circuit breaker is not affected, and the universality is wide.

Description

technical field [0001] The invention relates to a circuit breaker which provides overload and short-circuit protection for electrical circuits and electrical equipment, in particular to a double-pole circuit breaker. Background technique [0002] At present, there are many types of circuit breakers, and their working principles are also different. One type of circuit breaker uses circuit protection mechanisms such as short-circuit current relays and bimetal sheets inside and a tripping mechanism that cooperates with these protection mechanisms, and the action triggers The point is set on the tripping mechanism, and through the corresponding action of the circuit protection mechanism on overload, short circuit, etc. in the circuit, the tripping mechanism is driven to move and then the moving contact is separated from the static contact to realize the disconnection protection of the circuit. [0003] The above-mentioned type of circuit breaker mainly focuses on the linkage and...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned type of circuit breaker mainly focuses on the linkage and cooperation relationship between the circuit protection mechanism and the tripping mechanism, as well as the structure of the snapping and disengaging of the tripping mechanism itself. Is the response is not sensitive enough, prone to failure, etc.

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