ZK5000 series of digital integrated protection and monitoring device is mainly suitable for the protection, measurement and control system of transmission and distribution elements and circuit with the voltage up to 35kV. At the beginning of the design, we avoid the pick-and-mix automation system which has a negative effect on the whole system, such as communication network protection and system monitoring. As a result, it reduces the workload on engineering design, production, operation, maintenance and system expansion. The product has advantages on cost performance, including a more clear system formation, a more convenient information acquisition, a more stable operation, an easier maintenance and a more convenient system expansion.