Improvement of Reliability Performance in 100 A Current Rating Frame of MCCB

Abstract

Molded case circuit breakers (MCCB) are basically short circuit protective device (SCPD) which is used for Short circuit and Overload protection. MCCBs are generally used in industries, commercial, institutional buildings, Motors, Transformers, Distribution system and DG sets etc. for protection against short circuit faults and overload faults. This project focuses on 100A current rating frame of L&T MCCBs. Project scope is to improve reliability of MCCB in terms of short circuit and Overload performance as per IEC 60947-2 standard. Project involves analysis of failure, identification of root cause, development of concepts to improve the performance, evaluation of concepts through simulation study by using Design modeling and Simulation Software. Prototype and physical sample testing and validation of best suitable concept for its effectiveness.