Selective switch with selective protective module

Abstract

This invention discloses a selective switch with selective protection components including a breaker and a selective protection component to realize electric connection by input / output line end and realize mechanical connection by mechanical linked device, the selective protection component includes an electronic time delay stripping device including a detection unit testing current and outputting detection signals, an electronic control unit connected with a detection unit, receiving and analyzing test signals output by the test unit and generating control signals, a tripper, connected with the electronic control unit, receiving control signals generated by the electronic control unit connected to the operation unit in the protection component to operate the operation unit according to the control signal.

Description

technical field [0001] The present invention relates to protection devices in electrical installations, and more particularly to a selective switch with selective protection components for use in terminal power distribution networks. Background technique [0002] At present, with the development of building electrical and building automation, miniature circuit breakers are more and more widely used in residential power distribution systems. In miniature circuit breakers, the commonly used switches can only provide two protection characteristics of overload long-time delay and short-circuit transient, but lack short-circuit short-time delay protection characteristics, so it will lead to over-level tripping. Due to the widespread use of this kind of miniature circuit breaker lacking selective protection, the phenomenon of leapfrog tripping in residential power distribution systems is relatively common, which greatly affects the stability and reliability of the system. Althoug...

AI Technical Summary

Problems solved by technology

In miniature circuit breakers, commonly used switches can only provide two-stage protection characteristics of overload long-time delay and short-circuit transient, but lack short-circuit short-time delay protection characteristics, so it will lead to leapfrog tripping

Due to the wide use of miniature circuit breakers lacking selective protection at present, the phenomenon of leapfrog tripping in residential power distribution systems is relatively common, which greatly affects the stability and reliability of the system.

Although the front fuse can provide the necessary short-circuit backup protection, it cannot give the terminal electrical equipment the necessary selective protection.

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