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

Product Overview

YH10WX-200/520E is a 220kV line-type polymer-housed gapless metal-oxide surge arrester, specially engineered for overhead AC transmission lines. It is designed to effectively limit lightning and switching overvoltages, providing reliable insulation protection for line insulators, conductors and adjacent electrical equipment. The model features a suspension-type design (marked by suffix E), which is easy to install on transmission towers and ideal for medium-pollution, windy areas and plateaus with an altitude of ≤2000m (customizable for higher altitudes). Compared with traditional porcelain-housed arresters, it boasts superior hydrophobicity, aging resistance and a lightweight structure, ensuring stable performance and low maintenance in harsh outdoor working conditions.

Key Technical Specifications

Core Product Advantages

1. Gapless Design for Fast Response

No series gap structure enables instant response to overvoltage surges, with no gap-related maintenance issues. It ensures stable and consistent protection performance for the entire line operation cycle.

2. High-Quality Polymer Housing

Lightweight structure facilitates easy installation and transportation, reducing on-site construction difficulty. The polymer material has excellent hydrophobicity, anti-pollution and corrosion resistance, effectively preventing surface flashover and aging caused by dust, moisture and chemical contaminants.

3. Optimized Suspension Structure

Customized for transmission tower installation, it is compatible with mainstream tower hardware and insulators on the market. The firm suspension connection ensures the arrester remains vertical under strong wind conditions, avoiding performance degradation due to tilting.

4. High Reliability and Long Service Life

Complies with international standards IEC 60099-4 and IEC 60099-8, as well as industry technical specifications. Under normal operating conditions, the service life is no less than 15 years, with low failure rate and reduced later replacement and maintenance costs.

5. Comprehensive Overvoltage Protection

Not only does it effectively limit lightning overvoltage caused by thunderstorms, but also absorbs the energy of switching overvoltage generated by line switching and equipment operation, providing all-round insulation protection for 220kV transmission line systems.

Application Scenarios

• 220kV overhead AC power transmission lines, providing insulation protection for insulators, conductors and terminal equipment

• Outdoor working environments with medium pollution, frequent lightning strikes or strong winds

• Various transmission tower types (angle towers, tangent towers, river-crossing large-span towers) with suspension installation requirements

• Power grid areas that need to improve line lightning withstand level and reduce lightning trip rate

• Substation incoming line sections with high switching overvoltage, requiring pre-overvoltage limitation

Installation Guidelines

1. Adopt the standard suspension installation method matching 220kV transmission towers, and use professional connecting hardware to ensure a firm and reliable connection between the arrester and the tower.

2. Ensure the arrester is vertically hung during installation to avoid tilting, which may affect the uniform distribution of internal electric field and reduce overvoltage protection performance.

3. It is recommended to match with a dedicated series disconnector. When the arrester fails, the disconnector can automatically isolate the faulty unit from the power system, ensuring the normal operation of the line and facilitating safe replacement of the arrester.

4. The installation position should avoid direct collision with tower components and conductors, and reserve a sufficient safe distance to prevent flashover during operation.

5. All connecting parts must be tightened according to the specified torque to prevent loosening caused by wind vibration and other factors.

Routine Maintenance & Inspection

Inspection Frequency

• Normal operating areas: Routine visual inspection once a year

• Heavy pollution/lightning-prone areas: Comprehensive inspection every 6 months

• After severe weather: Immediate emergency inspection after thunderstorms, strong winds, hailstorms and other extreme weather

Key Inspection Items

1. Check the polymer housing for cracks, scratches, aging, discoloration or heavy pollution accumulation; clean the surface contaminants in time if necessary.

2. Inspect the suspension connecting parts, bolts and nuts for loosening, rust or damage; re-tighten or replace the damaged parts in a timely manner.

3. Check the integrity of the lead wire and connection terminal, and ensure no oxidation, overheating or loose connection at the terminal.

4. For arresters with disconnectors, check the status indicator of the disconnector to confirm the normal operation of the arrester.

5. In heavy pollution areas, conduct insulation resistance and leakage current testing regularly to verify the electrical performance of the arrester.

Ordering Notes

1. Clearly specify the product model YH10WX-200/520E and confirm the installation type (standard suspension type by default).

2. If the application altitude exceeds 2000m or the pollution level is higher than medium, please provide the exact altitude, pollution grade and on-site working conditions, and we will customize the insulation structure and creepage distance for you.

3. Indicate if you need matching accessories such as series disconnectors, special suspension hardware, connecting wires or installation brackets.

4. For export orders, we can provide all international certification documents including CE, ISO9001, as well as complete customs clearance materials complying with the import regulations of the destination country/region.

5. If you have special requirements for product packaging, delivery time or technical parameters, please note them in the order.

Frequently Asked Questions (FAQ)

Q1: Can this arrester be used in high-altitude areas above 3000m?

A1: Yes, it can. We will optimize the product's insulation structure and polymer material formula according to the exact altitude to adapt to the low air pressure and thin air environment in high-altitude areas, ensuring the protection performance meets the on-site working requirements. Please specify the exact altitude when placing an order.

Q2: Is YH10WX-200/520E compatible with non-standard tower hardware and insulators?

A2: Yes. The product is designed with universal installation interfaces, which are compatible with most mainstream standard hardware and insulators on the market. For non-standard or customized tower/insulator specifications, we can design and provide matching connecting parts to ensure perfect installation and matching.

Q3: What should I do if the arrester is damaged or fails during use?

A3: If the arrester is equipped with a series disconnector, the disconnector will automatically act to isolate the faulty arrester from the power system when a fault occurs, and the status indicator will send an alarm signal. You only need to arrange a power outage at the appropriate time to replace the faulty arrester. If the arrester is not equipped with a disconnector, please stop using it immediately and contact our after-sales team for on-site testing, maintenance or replacement.

Q4: Does the product provide a quality warranty? What is the after-sales service scope?

A4: We provide a 3-year quality warranty for YH10WX-200/520E. During the warranty period, we will provide free repair or replacement for products with quality problems caused by manufacturing defects. Our after-sales team provides 24/7 technical support, including on-site installation guidance, maintenance training and fault diagnosis. For international orders, we can arrange overseas after-sales engineers to provide on-site service according to customer needs.

Q5: What international standards does this product comply with?

A5: YH10WX-200/520E is fully designed and manufactured in accordance with IEC 60099-4:1991 (AC Metal-Oxide Surge Arresters Without Gaps) and IEC 60099-8:2011 (AC Metal-Oxide Surge Arresters with External Series Gaps for Overhead Lines). It has passed CE and ISO9001 quality management system certification, meeting the technical and quality requirements of international power grid projects.

Q6: Can the product be used in coastal areas with high salt spray?