System Functions
The surge arrester online monitoring system continuously measures both the total current and resistive current of surge arresters during operation, providing a highly sensitive indication of insulation defects. It uses an intelligent surge arrester current digital remote meter to collect data on total current, resistive current, and lightning strike counts. Monitoring data is transmitted via LoRa wireless communication to an access node, where it is processed and then uploaded—either wirelessly or via wired connection—to an intelligent diagnostic platform. This enables real-time monitoring and diagnosis of surge arrester operating conditions.
System Features
1.Self-Powered
The system harvests power from the surge arrester leakage current. It starts operating with as little as 100 μA and supports data transmission at 200 μA.
2.Wireless Transmission
Supports 2.4 GHz / 470 MHz low-power wireless transmission, fully compliant with State Grid low-power wireless communication protocol requirements.
3.Application Scenarios
Designed for leakage current monitoring of zinc oxide surge arresters in substations.
Main Monitoring Device
HMJ1011-WBQ Intelligent Surge Arrester Current Digital Remote Meter
- Application: Surge arrester monitoring
- Communication methods: LoRa wireless, RS485 wired
- Installation: Typically installed beneath the three-phase (A, B, C) surge arresters in a substation. The sensor is fixed on a bracket, with the arrester ground wire connected to the sensor’s high-voltage terminal, and the sensor ground terminal connected to earth via a grounding wire.
Field Deployment
This system has been successfully deployed in multiple substations, providing accurate real-time leakage current monitoring and reliable diagnostic data for surge arrester health assessment.
