Metal oxide Zinc High Voltage Surge Arrester for Overhead Line

General 

1. Ratings:0.22~500KV (porcelain),0.22~220KV(composite) 

Working Conditions

The surge arrester is designed for reliable operation under the following environmental and electrical conditions:

1. Ambient Air Temperature: –40°C to +40°C, suitable for extreme cold and hot climates.

2. Altitude: ≤ 2000 meters above sea level (higher altitude applications available upon request).

3. System Frequency: 48 Hz to 62 Hz, covering both 50 Hz and 60 Hz power systems worldwide.

4. Continuous Operating Voltage (Uc): The applied power frequency voltage between terminals must not exceed the continuous operating voltage rating of the surge arrester, ensuring no thermal runaway or premature aging.

5. Seismic Condition: Earthquake intensity less than 8 degrees (MSK scale), ensuring structural integrity during seismic events.

6. Maximum Wind Speed: 35 m/s, suitable for outdoor installations in high-wind regions, including coastal and open areas.

These working conditions ensure that the surge arrester performs reliably in harsh environments such as deserts, high-altitude regions, coastal zones, and industrial areas.

Features

1. Superior Protection Performance

• Provides excellent protection against:

• Lightning strikes (direct and indirect)

• Switching surges

• Temporary overvoltages (TOV)

• Transient overvoltages caused by fault clearing or capacitor bank switching

• Clamps overvoltages to a safe, equipment-friendly level, preventing insulation damage, flashover, and equipment failure.

• High energy absorption capacity ensures reliable performance even under multiple strike conditions.

2. Lightweight and Compact Design

• Zinc oxide (ZnO) surge arresters are significantly smaller and lighter than traditional silicon carbide (SiC) or gapped arresters.

• Compact size allows for:

• Easier installation in confined spaces (e.g., substations, pole-mounted systems)

• Reduced structural load on towers and supports

• Simplified handling and storage

• Lower weight also reduces shipping costs and installation labor.

3. Excellent Pollution Resistance

• Designed to withstand harsh environmental conditions, including:

• Heavy industrial pollution (e.g., cement plants, steel mills)

• Coastal salt spray and high humidity

• Dust, sand, and chemical contaminants

• Specially formulated silicone rubber or polymeric housing provides:

• High tracking and erosion resistance

• Superior hydrophobicity (water repellency)

• Long-term performance in pollution class III and IV environments (IEC 60815)

• Suitable for pollution-prone areas such as deserts, coastal regions, and heavy industrial zones.

4. Stable Long-Term Performance

• Offers consistent protection over a wide range of operating temperatures and system conditions.

• Minimal electrical and mechanical degradation over time, thanks to:

• High-quality ZnO varistor blocks

• Hermetically sealed internal structure (for porcelain housings)

• Advanced polymeric housing materials that resist UV and aging

• Long service life reduces replacement frequency and lifecycle cost.

5. No Spark Gaps – Maintenance-Free Operation

• Unlike traditional gapped arresters, ZnO surge arresters operate without spark gaps.

• Eliminates the risk of:

• Spark gap misalignment or contamination

• Gap erosion or failure over time

• Increased protective voltage levels due to gap degradation

• Results in lower maintenance requirements and higher reliability over the entire service life.

6. Optional Features (Available Upon Request)

• Discharge counter for monitoring surge events

• Leakage current meter for online condition assessment

• Insulated base for special mounting requirements

• Different housing materials: porcelain, silicone rubber, or cycloaliphatic epoxy

Applications

Overhead Transmission and Distribution Lines (33kV, 66kV, 110kV, 132kV, 220kV)

• Protects transformers, insulators, switches, and other line equipment from lightning-induced surges and switching overvoltages.

• Suitable for both wooden pole and steel tower constructions.

Substations (AIS and GIS)

• Safeguards critical substation infrastructure including:

• Power transformers

• Circuit breakers

• Disconnectors

• Busbars

• Current and voltage transformers

• Provides protection against switching surges and lightning strikes entering the substation via transmission lines.

Renewable Energy Systems (Solar & Wind)

• Used in solar farms and wind power plants to protect:

• Inverters

• Transformers

• Switchgear

• Control and communication systems

• Helps prevent costly downtime and component replacement in remote or harsh environments.

Industrial and Commercial Facilities

• Ensures reliability of electrical systems in:

• Factories and manufacturing plants

• Data centers

• Hospitals

• Airports

• Shopping malls and commercial buildings

• Prevents damage from surges caused by nearby lightning strikes, switching operations, or utility grid disturbances.

Railway and Traction Power Systems

• Protects traction substations, overhead catenary systems, and signaling equipment from overvoltages.

Mining and Offshore Installations

• Suitable for harsh, dusty, and corrosive environments where equipment reliability is critical.

Packing and Shipping

• Packaging Materials:
  Surge arresters are packed in sturdy wooden boxes with plastic inner packaging to protect against:

• Physical impact and crushing during transit

• Moisture and humidity ingress

• Dust, salt spray, and other environmental contaminants

• Shipping Methods:
  Delivered worldwide via:

• Sea freight (standard for large quantities and heavy items)

• Air freight (for urgent deliveries or small orders)

• Land freight (for regional or cross-border delivery)

• Custom Shipping Solutions:
  We offer tailored shipping solutions based on:

• Customer delivery schedule requirements

• Destination country import/export regulations

• Special handling or hazardous material considerations (if applicable)

• Shipping Documentation (provided with each shipment):

• Packing list

• Commercial invoice

• Bill of lading / Air waybill

• Quality certificate / Test reports (upon request)