2 results about "Defective Component" patented technology

This invention relates to the field of molded case circuit breaker (MCCB) technology, and particularly to a method and system for configuring multi-stage tripping characteristics of MCCBs. The method analyzes the current switching and transmission process of the target circuit breaker, establishes current transmission paths, and determines multiple rated current levels. Based on the current level and path, it predicts the tripping action characteristics, constructs a multi-stage tripping characteristic distribution network, and defines the tripping characteristic constraint intervals for each operating stage. It obtains the tripping component parameter distribution network, combines the distribution network and constraint intervals to identify defects, accurately locates defective tripping components and their defect severity, and performs targeted configuration optimization on the defective components based on their defect severity, generating the final optimization result. This method, through full-process modeling and quantitative analysis, achieves a closed loop from precise defect location to automatic optimization, effectively solving the problems of traditional configuration relying on experience, high trial-and-error costs, and low accuracy. It significantly improves the tripping accuracy and protection reliability of MCCBs under different operating conditions.

A maintenance assistance system comprises: a maintenance log information storage unit configured to store maintenance log information obtained by diagnosing a diagnostic target device in the past, wherein the maintenance log information comprises data from several data elements and defective component information; a priority learning unit configured to split the maintenance log information stored in the maintenance log information storage unit according to a split condition predetermined based on the data element, to learn a relationship between the data element and a defective component in the maintenance log information for each split, and to generate a priority level for the data element for each split condition;a similar case extraction unit configured to split diagnostic data for diagnosing the diagnostic target device according to the split condition and to extract a similar case, which is similar to the diagnostic data, from the maintenance log information storage unit based on a severity level of the data element associated with the split condition; and a defective component estimation unit configured to estimate a defective component of the diagnostic target device based on the similar case extracted by the similar case extraction unit.