HY5WZ-3.8/13.5 3kV Station Type Zinc Oxide Arrester Composite Housing Technology

Product Overview

Power system overvoltage protection is a key link in ensuring the safe operation of transmission and transformation equipment. The HY5WZ-3.8/13.5 3kV station type zinc oxide arrester adopts composite housing technology, and is the core overvoltage protection device, widely used in power generation, transmission, transformation and distribution systems to protect the insulation of electrical equipment from overvoltage damage. Its core zinc oxide resistor discs have excellent nonlinear volt-ampere characteristics. Under normal conditions, leakage current is only microampere level. When subjected to overvoltage, it instantly conducts to release energy, effectively limiting overvoltage amplitude and protecting equipment safety. Under normal operating voltage, the current through the arrester is only microampere level. When subjected to overvoltage, due to the nonlinearity of zinc oxide resistance, the current through the arrester instantly reaches thousands of amperes, and the arrester is in a conducting state, releasing overvoltage energy, thereby effectively limiting overvoltage damage to transmission and transformation equipment.

Organic housing metal oxide arresters combine the technical advantages of organic insulation materials and porcelain housing arresters. They not only have the performance of traditional arresters, but also have good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance, explosion-proof, hydrophobicity, and excellent sealing performance, adapting to various complex operating environments. The composite housing structure effectively solves the pain points of traditional porcelain housing arresters being prone to moisture and explosion, improving system operational safety.

HY5WZ-3.8/13.5 is suitable for AC 3kV station type power systems, used to limit the amplitude of lightning and system internal operating overvoltages to specified levels, and is the basic equipment for system insulation coordination. The same series includes HY5WZ-3.8/13.5, HY5WZ-5/13.5, HY5CZ-3.8/12.0 and other models, meeting different operating condition requirements. This series of arresters is a key lightning protection component in integrated, modular medium and high voltage transmission and transformation complete equipment, providing reliable overvoltage protection for station equipment.

Main Technical Parameters

Technical Features

• Excellent nonlinear volt-ampere characteristics: Zinc oxide resistor discs have leakage current only microampere level under normal operating voltage, instantly conduct during overvoltage with nanosecond response speed, effectively limiting overvoltage amplitude and protecting equipment insulation.
• Composite housing technology: Organic housing has good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance and other characteristics, adapting to complex outdoor climate conditions and extending product service life.
• Explosion-proof and sealing performance: Composite housing structure has excellent explosion-proof performance and good sealing, preventing moisture ingress, ensuring long-term operational reliability and reducing maintenance frequency.
• Large current carrying capacity: Square wave withstand capacity up to 200A, high current impulse withstand 65kA, strong energy release capability, capable of withstanding multiple overvoltage impacts, suitable for severe operating conditions.
• Low residual voltage level: Lightning impulse residual voltage only 13.5kV, switching impulse residual voltage 11.5kV, effectively reducing overvoltage stress on equipment insulation and improving system safety margin.
• Convenient installation and maintenance: Compact product structure, light weight, supports multiple installation methods, reducing installation costs and simple operation and maintenance.

Application Scenarios

HY5WZ-3.8/13.5 3kV station type zinc oxide arrester is suitable for power generation, transmission, transformation and distribution links in AC 3kV power systems, mainly used for overvoltage protection in station type locations. The product can effectively limit lightning overvoltages and system internal switching overvoltages, ensuring the insulation safety of transformers, switchgear, cables, busbars and other equipment. In scenarios such as power plants, substations and distribution stations, this arrester is the basic protection equipment for system insulation coordination, providing reliable lightning protection for the entire transmission and transformation system.

The same series can also select HY5WZ-5/13.5 or HY5CZ-3.8/12.0 based on system rated voltage and operating condition requirements. Among them, HY5CZ-3.8/12.0 is a gapped type, suitable for specific protection scenarios requiring gap isolation, providing users with flexible selection options. This series of arresters is widely used in the field of power system overvoltage protection and is a core component for ensuring the safe operation of station equipment.

Applicable Standards

This product model is compiled according to JB/T8459-1996 "Arrester Product Model Designation Method". Gapless products comply with GB11032-2000 "AC Gapless Metal Oxide Arresters" standard; gapped products comply with JB/T9672-2005 "Metal Oxide Arresters with Series Gaps" standard. Important parameters and configuration methods not clearly defined in the above standards shall be modified and implemented according to DL/T620-1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Installations". The entire process from design, production to testing strictly follows the above standard system, ensuring reliable performance and meeting power system safety operation requirements.

Selection Guide

Select the appropriate model based on system rated voltage and operating condition requirements: HY5WZ-3.8/13.5 is suitable for 3kV system standard conditions, with rated voltage 3.8kV and continuous operating voltage 2.0kV; HY5WZ-5/13.5 is suitable for occasions requiring higher rated voltage, with rated voltage 5kV and continuous operating voltage 4.0kV; HY5CZ-3.8/12.0 is a gapped type suitable for specific protection requirements. When selecting, comprehensively consider system rated voltage, continuous operating voltage, residual voltage requirements, current carrying capacity, service environment and other factors to ensure the arrester matches system insulation coordination and achieves optimal protection effect.

Outline Dimensions

Summary

HY5WZ-3.8/13.5 3kV station type zinc oxide arrester, with composite housing technology and excellent nonlinear volt-ampere characteristics, provides reliable overvoltage protection for 3kV power systems. The product strictly complies with GB11032-2000 and other national standards, with advantages of low residual voltage, large current carrying capacity, fast response speed and strong environmental adaptability, making it a core component for insulation protection of station type transmission and transformation equipment. Choose HY5WZ series arresters to provide solid protection for power system safe operation.