1. Product overview

BH5110B Online Monitoring System measures the lightning strike counts and three-phase leakage current values (Phase A, B, C) of 6-35 kV zinc oxide surge arresters. It enhances the arrester’s protection performance against line overvoltage and counting reliability, while effectively preventing MOA aging, moisture ingress, and side-flash issues.

2. Functions & features

·Online monitoring method

Through-core lightning current sensing with non-residual voltage counting, precisely capturing the lightning strike frequency of surge arresters.

Online monitoring of the leakage current value of surge arresters.

Simultaneous monitoring of the operating conditions of the three-phase surge arresters

·High-precision monitoring, and intelligent warning

Leakage current detection accuracy: ±0.02mA (measuring range: 0.06 to 2.00mA)

                   ±0.05mA (measuring range: 2.00 to 6.00mA)   

Alarm when the leakage current of any phase of the three-phase surge arrester exceeds the set value.

- Easy maintenance

The instrument adopts a front-panel removable design, allowing direct replacement during maintenance without opening the cabinet door.

3. Technical specifications

Lightning strike counting response interval: 1s

Lightning current response range: 50A - 10KA (peak)

Leakage current detection range: 0.06-6.00mA

Leakage current detection accuracy: ±0.02mA (measuring range: 0.06 to 2.00mA)

±0.05mA (measuring range: 2.00 to 6.00mA)

Leakage current detection method: detection interval of 0.5.

Leakage current over-limit alarm: when the value exceeds the preset threshold or the difference between three-phase currents exceeds twice the set value.

Operating environmental adaptability: -25°C to +55°C, ≤95% RH (Unless specially ordered, the device is restricted to indoor use only).

Monitor dimensions (mm): 96×48×115

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

Sensor cable length: 5m shielded cable (customizable)

Sensor dimensions (mm): 10 (inner diameter) × 60 (outer diameter) × 25 (height)

Power supply: AC/DC 95~260V

Alarm relay & contact rating: 220V AC / 0.5A - Normally Open (NO)

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