Abstract: In order to improve the automation level and fulfill the needs of monitoring and control of power distribution system in old coal preparation plant of Linxi Mining Co Ltd,ZN-1 remote intelligent measurement and control device was used to monitor and protect the electrical equipment,and introduced the structure,functions,characteristics and its application in the plant. After ZN-1 remote intelligent measurement and control device put into operation,increased the intelligentization and digitization level of the power distribution cabinets and realized remote control,remote measurement,remote communication and remote regulation,so that the security of the power distribution system were improved realized.