YH / YHW Type Zinc Oxide Lightning Arrester (10–220kV)
The YH / YHW Type Zinc Oxide Lightning Arrester is designed for 10kV–220kV power systems, providing reliable protection against lightning and switching overvoltages. Its gapless zinc oxide (ZnO) varistor technology responds rapidly to transient surges and helps limit excessive voltage, reducing stress on line insulation and high-voltage electrical equipment.
The series is available with porcelain (YH) or polymer (YHW) housings, allowing selection based on different installation and environmental conditions. It is suitable for overhead transmission and distribution lines, substations, transformers, switchgear, RMUs, and renewable energy grid connections, including outdoor applications in coastal, industrial, and high-altitude areas.
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The YH / YHW Series Metal Oxide Surge Arresters are designed to provide reliable protection for electrical equipment and power networks against lightning and switching overvoltages. They are suitable for overhead transmission and distribution lines, substations, and medium- to high-voltage electrical equipment where effective surge protection is required.
The series uses gapless metal oxide varistor (MOV) technology, allowing rapid response to transient overvoltages and efficient discharge of surge energy. This helps limit excessive voltage and reduce stress on insulation and connected equipment. The arresters are also designed for stable operation in outdoor environments, including areas affected by pollution or salt fog.
With voltage ratings available from 10kV to 220kV, the series offers two housing options: porcelain-housed YH arresters and polymer-housed YHW arresters. This range provides flexible solutions for utility networks, industrial power systems, transmission lines, and substation applications.
Product Highlights
- Wide Voltage Range: Available for 10kV to 220kV power systems, covering a broad range of transmission, distribution, and substation applications.
- Two Housing Options: Offered with either a porcelain housing (YH) or a polymer housing (YHW) to suit different environmental and installation requirements.
- Gapless ZnO Varistor Technology: The metal oxide varistor (MOV) core provides rapid response to transient overvoltages and effective surge energy discharge.
- Applicable Standards: Designed in accordance with IEC 60099-4 and GB 11032-2010 requirements.
- Outdoor Installation: Suitable for vertical outdoor mounting on appropriate transmission and substation structures.
- Reliable Long-Term Performance: The sealed construction provides good resistance to moisture and environmental exposure, while the arrester offers stable overvoltage limiting and good aging resistance.
Technical Data
| Item | Unit | Parameter | |
| Rated Voltage | kV | 10 – 220 | |
| Continuous Operating Voltage | 8.4 – 190 | ||
| Rated Discharge Current | kA | 5 / 10 / 20 | |
| Residual Voltage (8/20μs) | kV | 26 – 750 | |
| Leakage Current | μA | ≤ 50 (typical) | |
| Creepage Distance | mm/kV | ≥25 (customizable) | |
| Housing Material | / | Porcelain / Composite Polymer | |
| Mechanical Load Strength | N | ≥1000 | |
Model Designation
| Model | Voltage Class | Housing Type | Typical Use |
| YH-10 | 10kV | Porcelain | Distribution transformers |
| YHW-35 | 35kV | Polymer | MV substation & switchgear |
| YH-110 | 110kV | Porcelain | Transmission-level transformer bays |
| YHW-220 | 220kV | Polymer | Outdoor HV substations (coastal) |
Applications
The YH / YHW Series Metal Oxide Surge Arresters can be used across a wide range of transmission, distribution, and substation applications. They provide protection against lightning and switching overvoltages for both power system equipment and line insulation.
- Overhead Transmission and Distribution Lines: Helps limit transient overvoltages and protect line insulation from lightning and switching surges.
- Medium-Voltage Switchgear and RMUs: Suitable for surge protection in switchgear assemblies and ring main units (RMUs).
- Power Transformers and Reactive Equipment: Can be applied to protect power transformers, capacitor banks, reactors, and other high-voltage equipment.
- Renewable Energy Grid Connections: Suitable for wind and solar power facilities at grid interconnection points where surge protection is required.
- Outdoor Substations: Applicable to substations in coastal, industrial, polluted, and high-altitude environments.
Polymer Housing for Demanding Environments
The YHW polymer-housed type is particularly suitable for locations exposed to salt fog, acid rain, heavy pollution, or mechanical vibration. Compared with conventional porcelain construction, its lightweight polymer housing can simplify installation and handling while providing good resistance to environmental contamination and mechanical impact. This makes it a practical choice for challenging outdoor power system applications.
