Adopting a core through type residual current sensor does not affect the circuit structure of the primary equipment and does not increase the residual voltage at the high-voltage end of the lightning arrester;

Strong anti-interference ability, especially the ability to resist interference from power frequency magnetic fields;

Real time monitoring and recording of leakage current and discharge action information of lightning arresters, allowing for historical queries on leakage current and discharge action time;

When the leakage current value exceeds the set threshold, the normally open contact will close and trigger an alarm. The threshold can be set according to requirements;

Communicate with backend monitoring devices through RS485 bus; Meet the technical specifications of QGDW12355_2023 Smart Substation Part 4: Digital Remote Transmission Meter, Communication Requirements (see Appendix 1)

Performance: Meets the Technical Specification for Smart Substations Part 4: Digital Remote Transmission Meter (Q/GDW 12355.4-2023);

供電：AC/DC110V (AC/DC220V)；

Display: 4.3 'TFT LCD;

Monitoring: full current, number of actions;

Communication: RS485;

Main technical parameters:

組網說明

RS485 通信應采用專用屏蔽雙絞線電纜進行手拉手連接， 并且將屏蔽層單端連接地，一般采用終端匹配的總線型結構 ；RS485傳輸距離超過500m，在傳輸總線的兩端需要 2個終接電阻，其阻值要求等于傳輸電纜的特性阻抗（一般為 120 Ω )。

附表1：

避雷器數字化泄漏電流表數據標識表