Universal protection and control applied to a 3-breaker transfer scheme

A new modular hardware and software based protection and control system has been developed to be more flexible and economical than conventional relay platforms for the development of custom protection and control schemes. The system includes a computer aided engineering (CAE) package to permits rapid customization of the scheme's logic and protective elements. An embedded virtual test system allows for rapid debugging and testing. To demonstrate the system, a 3-breaker transfer scheme was developed to replace an older, existing transfer scheme based on discrete protective and logic device. This scheme integrates the transfer logic and the protective relaying functions in to one microprocessor based device.