YH10WX-200/520E 220kV Polymer Surge Arrester | Lightning Protection

Overview

Operating Conditions

1. Altitude: ≤ 2000 meters;

2. Ambient Temperature: -40°C to +40°C;

3. Minimum Creepage Distance: ≥5000mm (Creepage Ratio ≥25mm/kV);

4. Sealing Grade: IP65.

Core Product Advantages

1. Gapless Design for Fast Overvoltage Response

The gapless metal-oxide structure enables rapid response to transient overvoltages without relying on a series discharge gap. This helps provide consistent voltage-limiting performance while eliminating gap-related adjustment and maintenance requirements.

2. High-Performance Polymer Housing

The lightweight polymer housing simplifies transportation, handling, and tower installation. Its excellent hydrophobicity and resistance to pollution, moisture, UV exposure, and corrosion help reduce surface contamination and improve long-term outdoor insulation performance.

3. Optimized Suspension Structure

The suspension-type design is optimized for overhead transmission tower installation and can be configured to match commonly used tower hardware and insulator assemblies. A secure mechanical connection helps maintain the arrester’s intended position under wind and vibration conditions.

4. Reliable Long-Term Performance

The YH10WX-200/520E is designed with reference to applicable requirements of IEC 60099-4 and IEC 60099-8. Its durable composite construction supports reliable operation under normal service conditions while helping reduce maintenance and replacement requirements over the product’s service life.

5. Comprehensive Overvoltage Protection

The arrester provides protection against both lightning overvoltage and switching overvoltage. Its zinc oxide varistor elements limit transient voltage and absorb associated surge energy, helping protect the insulation of 220kV overhead transmission lines and associated electrical equipment.

Technical Data

Overall and mounting dimensions(mm)

Application Scenarios

The YH10WX-200/520E 220kV polymer-housed gapless surge arrester is suitable for a wide range of overhead transmission-line applications:

• 220kV Overhead AC Transmission Lines
  Provides overvoltage protection for line insulators, conductors, and associated terminal equipment.
• Windy, Lightning-Prone & Moderately Polluted Areas
  Suitable for outdoor environments exposed to frequent lightning, strong winds, moisture, dust, and moderate pollution.
• Various Transmission Tower Structures
  Designed for suspension installation on angle towers, tangent towers, and large-span river-crossing towers, subject to the required mechanical configuration.
• Power Grid Lightning Protection Applications
  Helps improve the lightning withstand performance of transmission lines and reduce lightning-related flashover and tripping risks.
• Substation Incoming Line Sections
  Suitable for areas where switching operations may generate significant transient overvoltages and additional surge protection is required.

Installation Guidelines

1. Secure Suspension Installation
   Use the appropriate suspension hardware and connecting fittings for 220kV transmission towers to ensure a firm and reliable mechanical connection between the arrester and tower structure.
2. Maintain Proper Vertical Alignment
   The arrester should be installed in the intended vertical position. Avoid excessive tilting or misalignment that could affect mechanical stability and electrical field distribution.
3. Use a Suitable Series Disconnector When Required
   A dedicated series disconnector can be used with the arrester where applicable. In the event of arrester failure, it helps isolate the faulty unit from the power system and simplifies subsequent inspection and replacement.
4. Maintain Adequate Electrical Clearance
   The installation position should provide sufficient clearance from tower components, conductors, and other grounded structures to reduce the risk of flashover during operation.
5. Check All Mechanical Connections
   All bolts, clamps, and connecting fittings should be tightened according to the specified torque requirements. Proper fastening helps prevent loosening caused by wind vibration, mechanical loading, and long-term outdoor operation.