Breaker capable of tracking load change to automatically set rated value

Abstract

The invention relates to a breaker capable of tracking load change to automatically set a rated value. The breaker comprises an electric tripping mechanism, a reclosing mechanism and an electronic control system, wherein the electronic control system comprises an MCU, a keyboard, a display, a first A / D converter, a second A / D converter, a current sampling sensor, a voltage sampling sensor, a program storage, a strategy controller and a data storage. The breaker has the advantages that the rated value of the breaker is automatically set by the electronic control system, and the rated current Irof the breaker is allowed to constantly track the load change and be timely changed to the optimal value; the safety of load equipment and electric lines is sensitively, safely and reliably protected, and electric fire possibly caused by various causes is avoided.

Description

technical field [0001] The invention relates to a circuit breaker which automatically adjusts the rated value by following the load variation. Background technique [0002] Circuit breakers occupy an extremely important position in power transmission and distribution, and have a very high market share. Circuit breakers mainly have two functions of switching and protection. The protection function is a very important function of circuit breakers. The protection function of the circuit breaker is realized based on the rated value. The load current I n is compared with the rated value I r, and the judgment is made based on the comparison result, and then it is selected whether to enter the overload or short-circuit protection state. [0003] The circuit breakers in the prior art generally have customized ratings and specifications when they leave the factory, and the user selects them according to the current specification, and cannot customize the current specification. In th...

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