The RCS-9700 electrical control system is a cost-effective automation system for the auxiliary electrical system with capacity up to 1000MW in a power plant. It provides high performance control and monitoring for the feeders, start-up/stand-by transformers, auxiliary transformers and other intelligent devices. The system adopts bay-oriented and object-oriented configuration with layered distributed architecture to replace the traditional centralized structure, and this makes the system more reliable, easier to extend and maintain. NR’s RCS-9700 series ECS system is fully compatible with IEC 61850 standard and it has been applied to many power plants and put into service successfully already.