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Digital Metering Device

Digital Metering Device

Digital Metering Device

The core digital metering devices for intelligent power O&M include the arrester leakage current digital meters and the SF₆ density gauge. The the arrester leakage current digital meters uses high-precision sensing technology to achieve real-time digital monitoring of arrester leakage current, enabling O&M personnel to understand equipment operating status, promptly detect anomalies, and reduce equipment failure risk. The SF₆ density gauge adopts advanced detection technology to accurately measure the density of SF₆ gas inside high-voltage equipment. Through intelligent analysis, it identifies abnormal density conditions caused by gas leakage or environmental factors and issues timely alarms, ensuring equipment safety and enhancing the stable operation of the power system.

Product Advantages

High-precision monitoring

High-precision monitoring

Employs advanced sensing technology to accurately collect data such as arrester leakage current and SF₆ gas density, ensuring monitoring results are authentic and reliable.

Real-time online

Real-time online

Converts monitoring data into digital information in real time, intuitively displaying equipment operating status and allowing O&M personnel to quickly grasp conditions.

Intelligent early warning

Intelligent early warning

Equipped with intelligent analysis capability, it provides early warning of abnormal data according to preset thresholds, detecting potential fault risks in advance.

Standardized design

Standardized design

The product supports both RS485 wired and LoRa wireless transmission modes. LoRa wireless strictly complies with State Grid micropower specifications, ensuring stable and reliable signal transmission.

Technical Specifications

the arrester leakage current digital meters SF₆ density table
Item Specifications
Applicable voltage levels <220kV
Residual voltage under nominal discharge current ≤2.5kV
2 ms square wave withstand capability 800A
4/10 μs high current withstand capability 100kA
Full current measurement range 100 μA–5 mA (optional)
Maximum permissible current measurement error ± (standard reading x 2% + 5 μA)
Fundamental peak value measurement range of resistive current 10µA~1mA
Maximum permissible error of resistive current measurement ± (standard reading x 2% + 5 µA)
Action count range 0~999
Item Specifications
Measurement range -0.1–0.9 MPa optional
Measurement accuracy At 20 °C: class 1.5; at -25 °C to +60 °C: class 2.5
Operating temperature -20℃~+60℃
Leakage rate ≤ 1 x 10⁻⁹ Pa·m³/s
Operating voltage DC24V
Power consumption <0.5W
Communication rate 9600bps
Insulation performance Insulation resistance > 100 MΩ

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