Introduction
The SDP-5100-D series microcomputer integrated protection device is a flash memory microcontroller based on ARM9 core 32 bits, which is adopted by the company on the basis of summing up the operating experience of existing products and integrating advanced technologies at home and abroad. Products independently developed and produced according to the requirements of the continuous development of China's power system. It is applicable to the high-voltage switchgear below 35kV and the first equipment of domestic substation. It can complete the functions of protection and monitoring.