YH5WZ-51/134Q Gapless Zinc Oxide Surge Arrester for 10–220kV

The YH5WZ-51/134Q Gapless Zinc Oxide Surge Arrester is an advanced, maintenance-free lightning protection device engineered for 10kV–220kV high-voltage transmission and substation networks. Using upgraded ZnO varistor technology and a reinforced composite silicone rubber housing, it delivers powerful overvoltage discharge capacity — up to 12kA (8/20μs) — reducing lightning-induced trip rates by more than 70%.

Designed to perform in -45°C to +75°C environments, the arrester features V-grade pollution resistance, excellent salt fog and chemical corrosion tolerance, and a compact, lightweight structure that simplifies installation. It complies with GB 11032-2000 (IEC 60099-4 equivalent) and JB/T 10497-2005 standards, and is manufactured under a certified ISO9001 Quality Management System.

1. Core Configuration and Design

Material and Structure

Enhanced ZnO Varistors:
Developed with an improved formulation, these varistors provide lower leakage current, slower aging, and higher surge endurance compared to standard types.
Reinforced Silicone Rubber Housing:
Made through an integrated molding process, ensuring zero gas gaps and superior sealing performance — preventing moisture, explosion, or contamination under severe outdoor conditions.
Compact and Lightweight:
Small in size and impact-resistant, enabling quick installation without heavy tools and reducing both time and manpower costs.

2. Key Technical Specifications

Performance Type	Specific Index	Description
Lightning Discharge Capacity	12kA, 8/20μs	Absorbs and releases lightning overvoltage energy rapidly
Lightning Trip Reduction	≥70%	Significantly enhances grid reliability
ZnO Varistor Performance	Low leakage, slow aging	Extends service life
Above-Standard Capability	Exceeds GB standards for DC reference voltage and current tolerance	High overload endurance

3. Environmental Adaptability

Temperature Range:
Operates reliably between -45°C and +75°C, adapting to both Arctic cold and tropical heat.
Corrosion Resistance:
Designed for high-salt and chemical environments, suitable for coastal areas, refineries, and chemical plants.
Pollution Resistance:
Rated V-grade (the highest level in the industry), ensuring stable operation in industrial pollution zones.
Maintenance Efficiency:
Long creepage distance and hydrophobic surface reduce contamination build-up, minimizing inspection and cleaning frequency.

4. Standards and Quality Assurance

Industry Compliance

The YH5WZ-51/134Q arrester meets or exceeds the requirements of the following key standards:

Standard Code	Description	Equivalence
GB 11032-2000	AC gapless metal oxide surge arresters	Equivalent to IEC 60099-4
JB/T 10497-2005	Composite-sheath MO arresters for transmission lines	–

Quality Control and Testing

Manufactured under a strict ISO9001-certified quality management system, every unit undergoes multi-level inspection to ensure reliability and safety.

Inspection Type	Testing Items
Varistor Inspection	Square wave screening, residual voltage under rated discharge current, DC reference voltage (U1mA), appearance check
Factory Inspection	Sealing test, DC reference voltage (U1mA), leakage current test at 0.75U1mA, power frequency voltage test, continuous current test, partial discharge test
Sampling Inspection	Accelerated aging test, 4/10μs high current withstand test, 2ms square wave current capacity test

5. Core Application Scenarios

• Heavy Industrial Zones

With V-grade pollution endurance and chemical corrosion resistance, the YH5WZ-51/134Q excels in petrochemical, metallurgical, and manufacturing regions, preventing flashovers and insulation degradation caused by contamination.

• Renewable Energy Stations

Ideal for wind farms and solar power plants, this arrester provides stable surge protection for collection networks, ensuring operational continuity of renewable power systems.

• Old Grid Upgrades

Compact and compatible with existing tower structures, it allows for seamless integration into existing grids without requiring the reconstruction of foundations. Lightweight and easy to install, it significantly reduces retrofit costs and installation time.

6. Key FAQs

• What environmental advantages does the YH5WZ-51/134Q arrester offer?
It can operate between -45°C and +75°C, resist salt fog and chemical corrosion, and handle V-grade pollution levels, making it ideal for coastal, industrial, and harsh-weather environments.

• How does it outperform conventional surge arresters?
It discharges 12kA (8/20μs) surges, reduces lightning trip rates by 70%+, and exceeds national standards in overload capacity. Its low-leakage ZnO varistors ensure longer life and higher reliability.

• Why is it suitable for old grid modernization?
Its compact design and universal compatibility allow installation on existing towers without modification. Lightweight and easy to handle, it also minimizes maintenance and reduces lifetime costs.

• Is it certified for quality assurance?
Yes. The YH5WZ-51/134Q is produced under ISO9001 certification, with multi-stage inspection covering electrical, mechanical, and environmental performance tests.

• Can it be used in renewable energy systems?
Absolutely. It provides robust surge protection for wind and solar installations, supporting sustainable and continuous energy delivery.

Conclusion

The YH5WZ-51/134Q Gapless Zinc Oxide Surge Arrester represents the next generation of smart, durable lightning protection technology for 10–220kV transmission and substation systems. Its high discharge capacity (12kA), broad environmental tolerance, and maintenance-free design make it the perfect solution for heavy industrial, renewable, and aging grid infrastructures.

For a customized protection solution or technical consultation, contact us today.