Motor bus transfer

The Motor Bus Transfer Working Group of the IEEE Power System Relaying Committee has performed a survey on industry practices for implementing automatic motor bus transfers in various power plant applications and the application of supervisory and control relays for these transfer schemes. This report summarizes automatic transfer methods for primary auxiliary buses that supply major rotating machinery loads. Fast, slow, parallel, residual voltage, and in-phase transfer methods are covered in this report. Information is also included on methods and criteria of acceptance testing of the motor bus transfer scheme