Abstract:

Aiming at the problem of unstable action time of delay characteristic in the production process of thermomagnetic release of low voltage circuit breaker,this paper analyses the structural characteristics,manufacturing methods and testing methods of bimetallic component materials,and describes the principle,method and means of the solution.A fast and convenient method is proposed through theoretical checking,practical test and result analysis.It can improve the production efficiency and ensure the reliability of product delay protection characteristics,which ensures the plastic case circuit breaker can operate reliably in the practical application circuit.

Key words: thermomagnetic release, bimetallic components, delay protection characteristics, reliability