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AM4 Series protection relay

● A complete set of protection, related to the application;

● 4 current input, 4 voltage input, 12DI, 5DO;

● Auxiliary power supply adapts with AC220V, DC220V, DC110V, AC110V;

● 1 RS485 serial communication, IEC60870-5-103 and Modbus-RTU;

● 1 RS232 for user update;

● 1 GPS for GPS timing;

● More than 200 sequence of event records, more than 400 system logs, and more than 10 seconds tripping context records;

● Powerful graphic programmable Logic. 



  • Rich protection functions

    Feeder protection; Transformer protection; Voltage protection

  • Measurement

    RMS current values; RMS voltage values; frequency; Power factor; RMS active power.

  • Control functions

    Remote control; Local control; Programmable switchgear interlocking

LCD Display







Typical connection


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