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Journal of Basic and Applied Engineering Research
This paper deals a new development of overload protection trip unit of electromechanical release for higher rating current of moulded case circuit breaker (MCCB). This is a replacement of microprocessor release by using both mechanical as well as electrical concept. Electromechanical release provides two types of protection which are overload current protection and the short-circuit protection. The thermal property of bimetal (gets elongated when heating) is used to sense the overload offatcat:27gfin4thndm3fmh3lvyytthr4