220kV Porcelain Lightning Arrester | High Voltage Surge Protection for Substations
The 220kV Porcelain Lightning Arrester is designed to provide reliable high-voltage surge protection for substations and transmission systems. It uses zinc oxide (ZnO) varistor technology to limit lightning and switching overvoltages, helping protect transformers, switchgear, transmission equipment, and other critical electrical assets from transient voltage stress.
Its high-strength porcelain housing provides reliable insulation and mechanical support for long-term outdoor operation. The arrester is suitable for 220kV substations, transmission lines, switchyards, and renewable energy grid connection points, particularly in environments exposed to pollution, salt fog, strong UV radiation, or severe weather conditions.
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The 220kV Ceramic Zinc Oxide Lightning Arrester is designed to protect high-voltage equipment in substations, transmission lines, and other outdoor power installations against lightning and switching overvoltages. By limiting transient voltage and safely diverting surge energy, it helps reduce insulation stress and supports reliable operation of 220kV power systems.
The arrester uses zinc oxide (ZnO) varistor technology to provide effective overvoltage protection without relying on conventional spark gaps. Its porcelain housing offers high mechanical strength and reliable outdoor insulation, making it suitable for areas exposed to severe weather, pollution, and other demanding environmental conditions.
With its robust ceramic construction and high-voltage surge protection capability, the arrester provides a practical solution for improving the safety, insulation reliability, and long-term stability of 220kV transmission and substation equipment.
Key Features
- 220kV System Application: Designed for 220kV high-voltage power systems, providing reliable protection against transient overvoltages on transmission lines and substation equipment.
- High-Strength Porcelain Housing: The ceramic housing provides strong mechanical support and reliable insulation, with good resistance to UV exposure, salt fog, pollution, and outdoor environmental stress.
- Effective Surge Energy Handling: The zinc oxide varistor elements can absorb and discharge surge energy caused by lightning and switching events, helping limit excessive voltage and protect electrical insulation.
- Low-Maintenance Operation: The robust construction is designed for long-term outdoor service with minimal routine maintenance, supporting stable operation throughout the arrester’s service life.
Technical Data
| Item | Unit | Parameter | |
| Rated Voltage | kV | 220 | |
| Maximum Continuous Operating Voltage | 177 | ||
| Nominal Discharge Current (8/20 μs) | kA | 10 | |
| Lightning Impulse Protection Level | kV | ≤ 650 | |
| Minimum Nominal Creepage Distance | ≤ 550 | ||
| Housing Material | / | Glazed porcelain (brown/gray) | |
| Creepage Distance | mm | ≥ 5500 | |
| Installation | / | Outdoor, horizontal, or vertical mount | |
| IEC Standard Compliance | IEC 60099-4 | ||
Application Scenarios
The 220kV Ceramic Zinc Oxide Lightning Arrester is suitable for high-voltage transmission and substation applications where reliable protection against lightning and switching overvoltages is required.
- 220kV Transmission Lines and Switchyards: Helps protect line insulation and high-voltage equipment from transient overvoltages.
- Outdoor Substations: Suitable for substations located in coastal, industrial, or polluted environments where strong external insulation performance is required.
- HV GIS Installations: Can be used for overvoltage protection in suitable GIS yard configurations and associated high-voltage equipment.
- Renewable Energy Grid Connection Points: Provides surge protection at high-voltage interfaces between renewable energy facilities and the transmission network.
- Demanding Outdoor Locations: Suitable for applications in desert regions, industrial areas, coastal power facilities, and high-altitude transmission lines.
Installation and Maintenance
- Install the arrester securely on an appropriate steel or concrete support structure using suitable mounting brackets and hardware.
- Maintain the required phase-to-ground and phase-to-phase clearances according to the applicable electrical design standards and project requirements.
- Connect the arrester base securely to the substation grounding grid to provide a reliable path for surge current.
- The arrester’s internal components do not require routine maintenance under normal operating conditions.
- In areas with heavy pollution, periodically inspect the porcelain housing and external insulation surface. Cleaning may be required to maintain insulation performance and reduce the risk of surface flashover.
