YH5WZ-51/134 (Station-Type) -51KV Gapless Line-Type Lightning Arrester
The YH5WZ-51/134 Station-Type 51kV Gapless Line-Type Lightning Arrester is designed to protect 51kV power systems from lightning and switching overvoltages. Its gapless zinc oxide varistor technology provides a fast response to transient surges and helps limit excessive voltage, reducing stress on line insulation and connected electrical equipment.
The arrester features a durable construction for reliable outdoor operation and requires minimal routine maintenance. It is suitable for substations, transmission lines, and other medium- and high-voltage power installations where dependable surge protection and stable system operation are required.
Get a QuoteOverview
The HY5WZ-51/134 Series Zinc Oxide Surge Arrester is designed for AC transmission lines and substations with voltage ratings from 10kV to 220kV. Installed in parallel with insulator strings, it helps limit lightning-induced overvoltages and reduce the electrical stress placed on line insulation and connected equipment.
The arrester is suitable for demanding environments where lightning exposure and terrain conditions can affect grid reliability. It can be applied in mining areas, coastal regions, mountainous locations, and other outdoor power networks, providing an effective solution for improving lightning protection and supporting stable operation of transmission systems.
Key Advantages
- Reliable Surge Protection: The arrester uses high-performance zinc oxide (ZnO) varistor elements to respond rapidly to transient overvoltages. It helps limit lightning and switching surges, reducing voltage stress on insulators and connected electrical equipment.
- Improved Line Reliability: The gapless design provides continuous overvoltage protection without the need for routine maintenance. By diverting surge energy away from the protected circuit, it helps reduce lightning-related faults and improve the overall operating reliability of transmission lines.
- Durable Polymer Construction: The integrated molded polymer housing provides good resistance to moisture, pollution, and outdoor environmental exposure. Its robust construction supports stable operation in demanding conditions, including coastal and mountainous areas.
- Flexible Installation: The compact and lightweight structure simplifies transportation and field installation. Depending on the application and configuration, the arrester can be installed using suspension-type or post-mounted arrangements on suitable transmission structures.
Technical Data
| Item | Unit | Parameter | |
| Rated System Voltage | kV | 35 | |
| Rated Arrester Voltage | 51 | ||
| Operating Voltage | 40.8 | ||
| Impulse Current | kA | 114 | |
| Continuous Operating Voltage | kV | 40.8 | |
| Lightning Impulse Residual Voltage | 135 | ||
| Power Frequency Withstand Voltage | 75 | ||
| Creepage Distance | mm | 1140 | |
Overall and mounting dimensions(mm)
