describe one type of secondary devices in detail

name：王宏             student ID：2015329620098          class：15级计算机科学与技术3班

The integrated automation equipment is one of the secondary devices . It includes line protection measurement and control cabinet, main transformer protection and control cabinet, electric energy metering screen, frequency voltage emergency control device, power quality monitoring cabinet, two security equipment, electric power dispatching data network access device cabinet, microcomputer monitoring system for booster station, voltage reactive power control device, communication interface cabinet, host, Engineer, engineer, Telecontrol, such as three workstations, microcomputer five defense system, network equipment, satellite timing device, video surveillance and access control system.

Besides，The secondary devices includes Integrated power system: including DC power unit, AC uninterruptible power supply (UPS)  And Communications equipment: optical terminal, integrated distribution cabinets, program-controlled dispatching switches, data communication network equipment and other equipment.