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In order to reduce the loss of the power grid fault caused to users and equipments. An online monitoring system for 6/10 KV electrical parameter is designed based on the KingView and RS-485 Bus. Network parameters via transformer detection and decompression then sent to the intelligent voltage / current transducer, intelligent Transmitter secondary buck and convert the signal to support 485 formats, at last by RS485 BUS uploaded the collected data to the monitoring computer. PC monitoring system using configuration software configuration king, by the KingView and SQL relational database configuration combined to achieve real-time data display, storage, alarm management. After commissioning, operation results show that the system is correct and feasible.