The series of digital universal protection devices are suitable for substations and power plants with the following voltage levels, and are used for protection and monitoring of power distribution incoming and outgoing lines, transformers, etc. Screens can be assembled centrally or installed locally in switch cabinets, fully supporting the comprehensive automation system protection functions of power substations and distribution stations
◇Current quick-break protection
◇Time-limited current quick-break protection
◇Inverse time-limited current Protection
◇ Overcurrent protection
◇Low voltage protection
◇Loss of voltage protection
◇Overvoltage protection
◇Zero sequence overcurrent protection
◇Zero sequence Overvoltage protection
◇Heavy gas protection
◇Light gas alarm
◇Over-temperature protection
◇High temperature alarm
◇Backup trip
◇Backup alarm
/> Input and output functions
◇ One external switching input
◇ One switching output
◇ One AC analog input
Communication function
◇Standard R communication interface< br/> ◇ B communication protocol
Functional configuration of series comprehensive protection devices
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Aoliang Electric AL-150 series microcomputer protection device