YH5WZ-51/134E Composite Zinc Oxide Surge Arrester for 10–220kV Systems
The YH5WZ-51/134E Composite Zinc Oxide Surge Arrester is designed for 10–220kV transmission and substation systems, providing reliable protection against lightning and switching overvoltages. It combines high-performance ZnO varistor elements with a durable composite silicone rubber housing for fast surge response, effective energy absorption, and dependable outdoor insulation. With flexible suspension and post-type mounting options, the arrester is suitable for substations, transmission lines, wind farms, coastal areas, and industrial environments where long-term, low-maintenance surge protection is required.
Get a QuoteOverview
The YH5WZ-51/134E Zinc Oxide Surge Arrester is designed for 10kV–220kV transmission and substation systems, providing effective protection against lightning impulses and switching overvoltages. It uses high-performance zinc oxide (ZnO) varistor elements to respond rapidly to transient voltage conditions and divert surge energy, helping protect transformers, switchgear, transmission lines, and other high-voltage equipment.
A high-strength composite silicone rubber housing provides reliable external insulation and resistance to demanding outdoor conditions. The arrester is designed for stable long-term operation with low maintenance requirements, while its anti-aging characteristics support extended service in continuously energized high-voltage systems.
The YH5WZ-51/134E supports both suspension-type and post-mounted configurations, allowing it to adapt to different installation arrangements on poles, transmission towers, and substations. It is suitable for applications in coastal areas with salt fog, industrial pollution zones, wind farms, and other outdoor environments where reliable surge protection and environmental durability are required.
The product is manufactured according to GB 11032-2000 and JB/T 10497-2005, with GB 11032 corresponding to the technical requirements of IEC 60099-4 for AC gapless metal oxide surge arresters.
Operating Conditions
1. Altitude: ≤ 2000 meters;
2. Ambient Temperature: -40°C to +40°C;
3. Power frequency: 48Hz-62Hz;
4. Maximum wind speed: ≤35m/s;
5. Seismic intensity: ≤Ms 7.
Core Design and Protection Functions
Structural Construction
The YH5WZ-51/134E incorporates high-performance zinc oxide (ZnO) varistor elements as its primary surge-protection components. Their nonlinear voltage-current characteristics enable the arrester to remain highly resistive during normal system operation while conducting surge current when an overvoltage occurs.
The arrester is enclosed in a high-strength composite silicone rubber housing, which provides electrical insulation as well as mechanical and environmental protection. An integrated molding process creates a sealed housing with good moisture resistance and reliable protection against outdoor contamination, making the arrester suitable for long-term exposure to demanding weather conditions.
Surge Protection Performance
- Lightning and Switching Surge Protection: The ZnO varistor elements respond rapidly to transient overvoltages, limiting excessive voltage and helping protect transmission lines, transformers, switchgear, and other high-voltage equipment.
- Improved Transmission Reliability: By providing a controlled discharge path for lightning surge energy, the arrester helps reduce insulation stress and the likelihood of lightning-related interruptions.
- Long-Service Design: Durable ZnO elements and a weather-resistant composite housing are designed for extended outdoor operation with minimal routine maintenance, helping reduce lifecycle maintenance requirements.
Overall and mounting dimensions(mm)
Performance and Installation Advantages
A. Electrical Protection and Operating Performance
- Efficient Surge Energy Handling: The ZnO varistor elements provide strong surge-current discharge capability and effective energy absorption, helping control transient overvoltages during lightning and switching events.
- Fast Overvoltage Response: The arrester reacts quickly to abnormal voltage conditions, limiting voltage stress and helping protect the insulation of connected electrical equipment.
- Low-Maintenance Operation: The sealed gapless construction is designed for long-term outdoor service without routine maintenance, reducing ongoing maintenance requirements.
- Strong Aging Resistance: High-quality varistor elements and a durable composite housing help maintain stable electrical and insulation performance over extended operating periods.
B. Mechanical and Installation Advantages
- Compact and Lightweight: The optimized structure makes the arrester easier to transport, handle, and install, particularly in elevated or difficult-access locations.
- Robust Mechanical Construction: The composite housing provides good resistance to mechanical impact, vibration, and tensile loads, supporting reliable operation in outdoor transmission environments.
- Flexible Mounting Options: The YH5WZ-51/134E can be configured for suspension mounting on transmission towers or post-type installation, adapting to different equipment layouts.
- Suitable for New and Retrofit Projects: Its installation flexibility allows integration with existing transmission structures as well as newly constructed substations and power lines, helping simplify equipment replacement and system upgrades.
