YH5WX-17/50 Polymer Housed Line Type Zinc Oxide Surge Arrester
The YH5WX-17/50 Polymer Housed Line Type Zinc Oxide Surge Arrester is designed for 10kV overhead transmission and distribution lines, providing reliable protection against lightning and switching overvoltages. It uses gapless ZnO varistor technology for rapid surge response and effective voltage limiting. The silicone rubber housing offers good insulation, weather resistance, and pollution performance, while the compact construction supports flexible installation on poles and transmission towers. It is well suited for outdoor power networks where dependable and low-maintenance surge protection is required.
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The YH5WX-17/50 Polymer Housed Line Type Zinc Oxide Surge Arrester is designed for 10kV overhead transmission and distribution lines, providing protection against lightning impulses and switching overvoltages. By limiting transient voltage and safely discharging surge energy, it helps reduce insulation stress and improve the overall reliability of the power line.
The arrester uses gapless metal oxide varistor (MOV) technology for rapid response to abnormal voltage conditions. Its silicone rubber housing provides reliable external insulation, good sealing performance, and resistance to outdoor environmental exposure. This construction makes the arrester suitable for long-term operation on transmission line structures.
The YH5WX-17/50 is manufactured in accordance with GB 11032-2000 and JB/T 8952-2005, with GB 11032 corresponding to the technical requirements of IEC 60099-4. It is suitable for 10kV power networks where reliable lightning and switching surge protection is required.
Model and Meaning
Key Features and Advantages
Reliable Overvoltage Protection
The YH5WX-17/50 uses high-performance zinc oxide (ZnO) varistor elements to provide effective protection against lightning and switching surges. The nonlinear characteristics of the varistors allow the arrester to respond rapidly when a transient overvoltage occurs. Surge energy is discharged to ground, helping limit voltage stress on line insulation and connected electrical equipment.
Integrated Polymer Housing
The arrester features an integrated silicone rubber housing that provides reliable insulation and environmental protection. The molded construction helps improve sealing and moisture resistance. Silicone rubber also offers good hydrophobicity, pollution resistance, UV resistance, and aging performance for outdoor transmission line applications.
Compact and Flexible Installation
With its compact and lightweight construction, the YH5WX-17/50 is convenient to transport and install on poles, towers, and other line structures. Depending on the system configuration, it can be used with suspension-type or post-mounted installation. Its mechanical strength also supports stable operation under wind, vibration, and icing conditions.
Low Maintenance for Outdoor Applications
The polymer housing is designed to maintain reliable insulation performance in polluted and exposed environments. Its resistance to moisture, contamination, and UV radiation helps reduce the risk of surface flashover and insulation deterioration. This makes the arrester suitable for coastal areas, industrial zones, and other demanding outdoor locations, while reducing routine maintenance requirements.
Technical Data
| Item | Unit | Parameter | |
| Rated Voltage(RMS) | kV | 17 | |
| Continuous operating voltage (RMS) | 13.6 | ||
| Nominal discharge current | kA | 5 | |
| Residual voltage at 5kA (peak) | kV | ≤50 | |
| DC reference voltage (U₁mA) | ≥25 | ||
| Leakage current at 0.75×U₁mA | μA | ≤50 | |
| Creepage distance | mm/kV | ≥25 | |
| Housing material | / | Silicone rubber (polymer) | |
Overall and mounting dimensions(mm)
Typical Applications
The YH5WX-17/50 Polymer Housed Line Type Zinc Oxide Surge Arrester is suitable for various 10kV overhead line applications where lightning and switching surges may affect system reliability.
- 10kV Overhead Transmission and Distribution Lines: Suitable for lines exposed to frequent lightning activity or recurring lightning-related trips.
- High Grounding Resistance Locations: Useful for transmission sections with higher tower grounding resistance, including long-span crossings over rivers, valleys, and mountainous terrain.
- Coastal and Industrial Areas: The silicone rubber housing provides good resistance to pollution, salt fog, moisture, and outdoor contamination.
- Urban and Rural Distribution Networks: Suitable for both new installations and aging-line renovation projects where additional surge protection is required.
Installation and Maintenance
Proper installation is important to ensure reliable electrical and mechanical performance. The arrester should be installed according to applicable electrical standards and project requirements, with secure electrical connections and proper mechanical fastening.
During routine maintenance, inspect the silicone rubber housing, mounting hardware, and electrical connections for visible cracks, deformation, corrosion, or other signs of damage. A damaged arrester should be replaced promptly.
Before installation, store the product in a dry and well-ventilated environment. Avoid prolonged exposure to direct sunlight, excessive moisture, or other conditions that may affect the insulating materials.
For applications requiring additional fault isolation, the arrester can be equipped with a compatible thermal explosion-type disconnector, such as the TLB-1 type. When properly coordinated with the arrester, the disconnector can separate a failed arrester from the power system and provide a visible indication for maintenance.
