★ It has multiple protection functions such as quick break, time limited quick break, overcurrent, overcurrent inverse time limit, overload, high side zero sequence overcurrent, low side zero sequence overcurrent, zero sequence overcurrent I/II/III, zero sequence III inverse time limit, overvoltage/undervoltage, low-frequency load shedding, bus grounding, PT disconnection/voltage loss, system power loss, non electricity (light gas, heavy gas, over temperature trip, high temperature alarm, main transformer door opening, negative control trip), and has the function of recording protection events;

★ Comprehensive measurement of three-phase current, zero sequence current, three-phase/line voltage, active/reactive power, power factor, frequency, and other electrical quantities;

★ Energy metering: active energy (kWh), reactive energy (kvarh);

★ It has the function of judging the disconnection of the control circuit;

★ 1 RS-485 communication interface, Modbus RTU communication protocol, can remotely open and close circuit breakers;

★ 14 channels of switch remote signal input: Among them, 11 channels have the functions of circuit breaker closing/opening, remote control permission, manual tripping/closing, heavy gas, light gas, over temperature tripping, high temperature alarm, main transformer opening door, negative control tripping signal access;

★ 6-way relay output: used for accident signal, alarm signal, remote control opening and closing, fault tripping, and protection tripping low side output respectively;

Various comprehensive measurement values and SOE event records can be read in real-time through the communication port, and all protection parameters can be set through the display panel;

Scope of application: This transformer protection and measurement device is suitable for small and medium-sized transformer circuits that directly convert 35kV, 10kV, 6kV to 380V voltage levels.

Note: This diagram is for reference only. The wiring diagram is subject to the actual product. If there are any objections, please contact our technical team before purchasing.