1. Product overview

The BH5115 is a self-powered online monitoring device designed for metal-oxide arresters (MOA), utilizing the arrester's leakage current as its sole power source. Its ultra-low-power design enables real-time monitoring of the leakage current, the number of actions and insulation status of the arrest without external power supply, ensuring the timely detection and early warning of potential faults to ensure the safe and stable operation of the power system.

2. Functions & features

· Passive and power free

Self-powered technology: harnessing MOA leakage current for autonomous operation

Each monitor is equipped with a dedicated quick-start key for energy accumulation and menu parameter setting, see the manual for details of use

-Precise condition monitoring

Leakage current detection resolution: ±0.01mA (measuring range: 0.05 to 3.00mA)

Adopt A, B, C three-phase integrated operation, with independent detection of surge arrester, for identifying insulation aging, moisture and other hidden dangers

The zinc oxide valve with high-current capacity is used as the lightning strike counting sensor, the residual voltage is small when lightning discharge current, and the reading is safe and reliable.

On-line monitoring of MOA leakage current value, alarm contact signal when leakage current exceeds the threshold

- Easy maintenance

Hot-swappable panel-mounted design.

3. Technical specifications

Lightning strike counting response interval: 1s

● Lightning current response range: 50A ~10KA (peak), residual voltage of sampling valve ≤600V

● Maximum lightning strike count: 9999

● Leakage current detection range: 0.05~3.00mA

● Leakage current detection resolution: ±0.01mA (measuring range: 0.05 to 3.00mA)

● Leakage current detection interval: automatically detected every 5 minutes, or detected every time the display button is pressed

● Leakage current over-limit alarm: When the set value is exceeded, the alarm relay contacts close and automatically reset after 8 hours

(Can be manually reset if necessary)

● Operating environmental adaptability: -20℃ to 50℃, ≤95% RH (Unless specially ordered, the device is restricted to indoor use only).

Monitor dimensions: 96×48×115

Panel cutout dimensions: 92×44 (for flush mounting)

● Sensor cable length: 5m shielded cable (custom cable length can be provided based on user requirements)

● Sensor external and fixed size: outer diameter of 74mm; fixing screws: M8 × 25 at both ends

● Alarm relay & contact rating: AC220V/1A - normally open

4. Applications

Power systems: real-time monitoring of surge arrester conditions for substations & transmission lines   

Rail transit: smart O&M for lightning protection equipment in high-speed rail & metro systems   

Telecom base stations: health management of lightning protection systems for uninterrupted communication security   

Industrial applications: lightning protection monitoring for high-voltage equipment in petrochemical & mining operations