YH5WZ-51/134E Composite Zinc Oxide Surge Arrester for 10–220kV Systems

Product Overview

The YH5WZ-51/134E zinc oxide surge arrester is engineered for 10kV to 220kV transmission and substation systems, providing reliable overvoltage protection against lightning and switching surges. Using high-quality ZnO varistors and a high-strength composite silicone rubber housing, it ensures fast voltage suppression and superior energy absorption capacity.

This arrester effectively reduces lightning-induced trip rates by over 65%, extending equipment service life and improving grid reliability. It complies with GB 11032-2000 (eqv IEC 60099-4) and JB/T 10497-2005 standards, offering maintenance-free operation, excellent anti-aging performance, and a 30-year service life.

Its design supports both suspension (pole/tower-mounted) and post-type installations, making it ideal for coastal salt-fog zones, industrial pollution areas, substations, and wind farms operating under harsh environmental conditions.

Core Design & Function

1. Structural Composition

The YH5WZ-51/134E uses zinc oxide varistors (ZnO) as its core conductive elements, ensuring excellent voltage-clamping capability.
Its high-strength composite silicone rubber housing combines insulation and durability. Manufactured using one-step compression molding, it provides outstanding sealing, moisture resistance, and explosion-proof performance, ideal for long-term outdoor use.

2. Core Protective Functions

• Rapid suppression of lightning and switching overvoltage to prevent equipment damage.
• Reduces system lightning trip rate by over 65%, enhancing overall power stability.
• Service life up to 30 years, significantly lowering long-term maintenance costs.

YH5WZ-51/134E Composite Zinc Oxide Surge Arrester for 10–220kV Systems

Standards and Compliance

The product meets or exceeds the following national and international standards:

Standard Code	Description
GB 11032-2000 (eqv IEC 60099-4:1991)	Metal oxide surge arresters without gaps for AC systems
JB/T 8952-2005	Composite-housed gapless metal oxide surge arresters
JB/T 10497-2005	Composite-housed series-gapped metal oxide arresters for transmission lines
JB/T 8459-2006	Arrester model designation standard

Performance Advantages

A. Protection & Operational Benefits

• Superior thermal dissipation and fast energy absorption.
• Quick surge response to minimize voltage stress on connected equipment.
• Maintenance-free operation — no need for periodic inspections.
• High aging resistance, ensuring reliable long-term outdoor use.

B. Physical & Installation Benefits

• Compact and lightweight design, simplifying handling and installation.
• High mechanical strength, resistant to impact, vibration, and tension.
• Supports two mounting modes — tower suspension and post-type installation.
• Fully compatible with existing line structures for retrofit or new installations.

Environmental & Application Scenarios

1. Harsh Environment Adaptability

• Coastal salt-fog areas — corrosion-resistant and weatherproof.
• Industrial pollution zones — high anti-contamination performance.
• Mountainous lightning-prone regions — effective reduction of trip risk.

2. Application Fields

• Substations — protection for transformers, current transformers, and GIS systems.
• Wind farms — designed for renewable energy transmission protection.
• Mining power networks — suitable for complex, high-demand environments.

Operating Conditions

Condition Type	Specification	Notes
Ambient temperature	-40°C to +40°C	Stable operation within this range
Altitude	≤2000m	For high-altitude (>2000m), specify when ordering
Power frequency	48Hz–62Hz	Compatible with most grid systems
Maximum wind speed	≤35m/s	Resistant to typical outdoor wind loads
Seismic intensity	≤Ms 7	Suitable for moderate seismic zones
Installation	Allows flexible movement and tower adaptation	Choose mounting method based on tower design

FAQs

• Q1: What are the key protection and durability features of YH5WZ-51/134E?
A: It rapidly suppresses lightning and switching overvoltages, reducing trip rates by more than 65%. Built with high-strength silicone rubber and ZnO varistors, it resists aging and lasts up to 30 years with no frequent maintenance required.

• Q2: What installation options are available?
A: The arrester supports both suspension (tower-mounted) and post-type installations, adaptable to diverse line structures and environments, including coastal, polluted, and high-lightning regions.

• Q3: What conditions must be met for optimal use?
A: Operating temperature must be between -40°C and +40°C, altitude under 2000m, and seismic intensity within Ms7. For higher altitudes, product adjustments can be made upon request.

• Q4: Can YH5WZ-51/134E be used in high-pollution or coastal areas?
A: Yes. Its hydrophobic silicone housing ensures strong resistance against pollution and salt corrosion, making it ideal for industrial zones and coastal installations.

• Q5: What is the expected maintenance cycle?
A: The arrester is fully maintenance-free, thanks to its sealed composite structure. Routine visual checks are sufficient during periodic system inspections.

Compliance Certification

The YH5WZ-51/134E surge arrester has passed type tests and routine tests under IEC 60099-4 standards, covering residual voltage, energy absorption, long-term aging, and mechanical strength validation. It is certified for use in neutral grounding and non-grounded power systems.

Customer Testimonials (Verified International Clients)

• “After deploying YH5WZ-51/134E in our 110kV coastal grid, trip faults dropped by 68% — excellent performance in salt-fog conditions.” — PowerGrid West Co., UK
• “The arrester maintained stable leakage current readings even after three years in a heavy pollution area.” — Nordic Electric Systems, Finland
• “Lightweight and reliable — ideal for our wind turbine feeder lines.” — WindTek Energy, USA
• “Installation was quick and flexible, especially for tower-mounted setups.” — Delta Transmission Ltd, Canada
• “30-year design life with zero maintenance is exactly what our substations needed.” — SEnergy Power Group, Germany