... protection, Electrostatic protection, Over current protection), 3-Phase AC Power Opto isolated inputs to detect the Electricity A, B, ... anti-theft application;2.Electrical Power Unit(EPU) Monitoring and Anti-theft applications;3.Power Plant, transmission Substation, power towers;4. ... phase and with input occurrence alarm;11.Supports two way voice communication;12.Supports external siren, the siren ...