In view of 600 MW generators automatic device, first analyzes the initial material. Thus has determined the electrical main wiring. Then carried on short-circuited the electric current computation, according to calculate the result of to choose the electricity equipments. Has used the advanced equipments of the name DGT801、pss660、WBKQ-01B. and carry on to the each protection whole protective settle the calculation, fresh and clear and outstanding the characteristics that each one protect，It is used to meet the requirements of big unit set for selectivity , sensitivity and reliability in configuration and setting.
Base on power high- speed switch simulation, Proposed the idea of use the software of simulation. Establishment the model of power high- speed switch. This model is composed by the Three-Phase break、Simplified Synchronous Machine block、Scope block. Analyze the voltage characteristics of the bus bar after outage are .as well as possible matters during house supply transfer. Four possible transfer modes are presented: the fast transfer, the first phase coincidence transfer, The fast transfer is the safest and most reliable mode, which is regarded as the main transfer.
Key Words generator-transformer unit ，Automatic device，setting calculation ， high- speed switch， simulation
