The microcomputer integrated protection is applicable to ungrounded systems, resistance grounding systems or distribution arc coil grounding systems of voltage levels of 35kV and below. It can be used as the incoming line protection and outgoing line protection of the line or the integrated protection of the transformer used in the plant (station). It can be installed in small ring network cabinets such as solid cabinets and inflatable cabinets.

Product features

◆ AC rated current: 5A or 1A (please specify when ordering);

◆ AC rated voltage: 57.7V or 100V (please specify when ordering);

◆ Operating frequency: 50HZ;

◆ Working power supply: AC/DC85-265V;

◆ Input power supply: internal 24V;

◆ Current measurement accuracy: 0.5 level;

◆ Voltage measurement accuracy: 0.5 level;

◆ Protection action export time: 1.5 times the fixed value protection action time is not more than 35ms;

◆ Output node: continuously connected to AC/DC220V, 5A current (pure resistive load).

Measurement and control function

◆ Telemetering: voltage, current, active power, reactive power, power factor, etc., which can be set to display primary or secondary values;

◆ Telesignaling: The device has 8-way telesignaling inputs;

◆ Event record: The device can record 64 events including input position change, device self-check, protection action, etc., which will not be lost in case of power failure;

◆ Remote control: The device can remotely open and close the switch and call and modify the protection setting remotely through the remote background.

Protection function

◆ Unlimited time overcurrent protection

◆ Two-stage definite time overcurrent protection

◆ Overload protection

◆ Inverse time overload protection

◆ Zero sequence overcurrent protection

◆ Zero sequence overvoltage protection

◆ PT disconnection monitoring

◆ Overvoltage protection

◆ Loss of pressure protection

◆ Non-electrical quantity protection (heavy gas tripping, light gas alarm, over-temperature tripping, high temperature alarm)

Communication function

◆ You can choose the high-speed standard R5485 interface with magnetic isolation or the high-speed standard CAN2.0B interface with magnetic isolation (choose one of the two, please specify when ordering);

◆ The communication protocol of the R5485 interface is IEC 60870-103 communication protocol;

◆ The communication protocol of the CAN2.0B interface is IEC 60870-104 protocol.