The HV3P-630A relay protection tester is designed according to the technical specifications of "DL/T 624- 2010 Technical Conditions for microcomputer relay protection test Device", and based on the IEC61850 communication protocol, using advanced computer technology to realize the relay protection test device. The unit is equipped with high-performance power amplifier and based on the powerful PowerPC + X86 platform, the product adopts modular design, with powerful, high precision, small size, light weight characteristics, can realize the function and performance of the relay protection device, measurement and control device test, suitable for power plants, substations, all kinds of scientific research units and equipment manufacturing enterprises