The Y-800 busbar controller is used to control three frame circuit breakers, realize the conversion of two power supplies and the busbar connection on the load side.It is based on microprocessor, which can detect the voltage of two three-phase incoming lines accurately, make accurate judgment on the voltage abnormality (overvoltage, undervoltage, over frequency, under frequency, missing phase, reverse phase sequence), complete the power conversion and the connection and disconnection of the bus on the load side according to the given logic, and output the passive control switch to complete the control of the load, display the system status and other functions.The controller is equipped with electrical interlock accessories, which cooperate with mechanical interlock to realize redundant interlock system and improve the reliability of operation.The product has compact structure, simple wiring and high reliability. It can be widely used in electrical automatic control systems of power, telecommunications, petrochemical, mining, rail transit, municipal, data center, intelligent building and other industries.