Self-protection type circuit breaker shell

Abstract

The invention discloses a self-protection type circuit breaker shell, which comprises a circuit breaker body, wherein a lower mounting plate is arranged below the circuit breaker body, the circuit breaker body is arranged at the top end of the lower mounting plate in a sliding mode, an upper mounting plate is arranged above the circuit breaker body, a first rotating groove is formed in the middleof the upper mounting plate, a rotating plate is rotatably connected into the first rotating groove, an inserting hole is formed in the top end of the upper mounting plate and located in the front face of the first rotating groove, an extrusion rod is inserted into the inner wall of the inserting hole, and a clamping block is fixedly connected to the top end of the circuit breaker body. By arranging the rotating plate, the clamping block and the extrusion rod, the extrusion rod downwards extrudes the rotating plate to rotate, so that the rotating plate extrudes the clamping block to position the clamping block, the circuit breaker can be mounted between the upper mounting plate and the lower mounting plate, the phenomenon of unstable mounting caused by repeated mounting and dismounting ofthe circuit breaker is avoided through the extrusion fixing mode, and the mounting stability of the circuit breaker is improved.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to a self-protecting circuit breaker housing. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are generally composed of contact systems, The arc extinguishing system, the operating mechanism, the release device, the casing, etc. The release device is connected to the circuit breaker and is used to release the holding mechanism and automatically disconnect the circuit breaker. When the vector sum of the current passing through the zero-sequence current transformer is not equal to zero, the voltage is generated on both sides of the secondary coil of the transformer and amplified by the integrated circuit. When the set value is reached, the leakage release will cut off the p...

AI Technical Summary

Problems solved by technology

[0003] The circuit breaker is generally installed in the power distribution cabinet. By installing two clamping rails in the power distribution cabinet, the outer shell of the circuit breaker is fitted with the two clamping rails in a snap-fitting manner. This installation method follows the circuit breaker After repeated disassembly and assembly of the circuit breaker, there will be a phenomenon that the circuit breaker shell cannot be tightly engaged with the clamping rail, which will cause the installed circuit breaker to fall off very easily, reducing the stability of the circuit breaker installation

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