Wuhan Goldhome Hipot Electrical Co., Ltd. Delivers Advanced Live-Line Testing Instrument for Zinc Oxide Surge Arresters, Enhancing Power System Safety
Wuhan Goldhome Hipot Electrical Co., Ltd. recently completed the delivery of an order for a live-line testing instrument for zinc oxide surge arresters, further fulfilling its commitment to supporting the reliability of global power infrastructure. This testing instrument enables power companies and industrial clients to perform critical inspections on surge arresters without disconnecting the system power supply, effectively ensuring safe operation and maintaining system continuity.
The Zinc Oxide Surge Arrester Live-Line Tester is specifically designed for operational convenience and testing precision, enabling technicians to evaluate the condition of zinc oxide surge arresters under actual operating voltages. Such testing is crucial for early identification of potential faults, thereby preventing unplanned outages and enhancing the overall stability of power networks. This equipment is suitable for diverse scenarios including substations, transmission lines, and industrial power systems.
Core Technical Advantages
- High Precision and Anti-Interference Capability:
Equipped with a 24-bit high-precision AD converter and shielded signal acquisition module, achieving measurement accuracy of ±1% for leakage current (range: 0.1μA–10mA) and ±0.5% for voltage.
Utilizes adaptive filtering and phase compensation technology to effectively suppress harmonic, electromagnetic field, and adjacent equipment interference, ensuring measurement reliability in complex substation environments.
- Live-Line Testing and Non-Destructive Inspection:
Supports live-line testing at rated operating voltages (10kV–1000kV), eliminating power outage requirements and minimizing grid downtime.
Clamp-on current sensors (jaw size: 50–120mm) enable convenient installation without removing lightning arresters, preventing secondary equipment damage.
- Comprehensive Parameter Measurement:
Measures total leakage current (IT), resistive current (IR), capacitive current (IC), third-harmonic resistive current (IR3), and power factor (cosφ), covering all key metrics specified by GB/T 11032-2010 and IEC 60099-4 standards.
Select advanced models also support temperature measurement, correlating leakage current variations with ambient temperature to prevent misjudgments caused by thermal effects.
- Intelligent and User-Friendly Design:
7-inch color touch screen with Chinese/English interface, supporting one-key operation and real-time data display. Built-in standard parameter thresholds for automatic pass/fail judgment.
Stores up to 50,000 test records, supporting USB/Wi-Fi/Bluetooth data export and cloud synchronization. Generates standardized test reports (PDF/Excel) with one click.
- Portability and Environmental Adaptability:
Lightweight design (weight ≤6kg) with ergonomic handle, suitable for field operations on transmission towers, substations, and high-altitude facilities.
Operating temperature range: -20℃ to 65℃, IP65 dust/water resistance, and anti-vibration structure, ensuring stable performance in harsh environments (e.g., coastal salt spray, desert dust, or high humidity).
- Safety Protection:
Integrated over-voltage, over-current, and electric shock protection functions. The high-voltage signal acquisition circuit is optically isolated via fiber optics, and the tester automatically discharges residual voltage after testing to ensure operator safety.
Case Study
Prior to the 2024 thunderstorm season, a provincial power grid company in eastern China utilized the GH-ZnO live-line testing instrument for surge arresters developed by Wuhan Goldhome Hipot Electrical Co., Ltd. to inspect over 800 ZnO surge arresters across 30 substations:
The inspection revealed abnormal resistance currents (IR > 10μA) in 16 arresters, while 8 others exhibited excessive third-harmonic resistance currents, indicating aging varistors and moisture ingress.
Targeted replacement of these arresters successfully prevented 12 potential flashover incidents during the thunderstorm season, averting economic losses exceeding 3 million yuan.
The tester's cloud synchronization capability enabled the power grid to establish a centralized arrester health management platform, supporting long-term trend analysis and predictive maintenance.
As part of its customer-focused approach, Goldhome Hipot maintains an active technical support service, assisting clients with tester operation and maintenance. The company regularly organizes training sessions-both online and on-site-to keep users updated on best practices in live electrical testing.
