Design and Development of Pneumatic Fixtures for Circuit-Breaker Production Industries

Abstract

In any power system, Circuit breaker is used to operate any electrical equipment in, on load condition as well as in case of severe short circuit faults, which require handling of large mechanical stresses. The use of fixture has become very essential in manufacturing industries, it can achieve higher accuracy and production rate with good quality. The repetitive and complex task can be done quite easily by the use of fixture and it also allows automation for the same. The purpose of this project is to develop Fixture for sub assembly of the split pin to be press fit with lower contact for different rating of circuit breaker to save rejection cost and reduce cycle time for assembly. For insert split pin in to terminal electro – pneumatic actuator is used. Same as design a fixture to insert cluster in to the terminal for sub assembly of air circuit breaker. Another testing setup is develop for check on – reset condition of Molded Case Circuit Breaker(MCCB) with or without Rotary Operated Mechanism(ROM). Holding and location of MCCB and ROM is important for development of testing setup. For control electro – pneumatic actuator PLC program is generated. Various schemes are conceptualized based on parameter such as, fixture assembly planning, handling ease, shop floor height, Fixture Weight etc.. . . The fixture is modelled using CAD Software and Analysis is carried out using Finite Element Analysis(FEA). The Fixture is analysed using 3D FEA software. By studying the result best possible design is selected. After implementation of setup MCCB productivity increase by 15-20%.