HY5WS-3.8/13.5 3kV Distribution Type Zinc Oxide Arrester Composite Housing

Product Overview

HY5WS-3.8/13.5 3kV distribution type zinc oxide arrester is an overvoltage protection device specially designed for AC distribution systems, adopting composite housing technology to solve the pain points of poor explosion-proof performance and easy sealing failure of traditional porcelain housing arresters. This product is widely used in 3kV distribution networks to protect the insulation of transformers, switchgear, cables and other electrical equipment from overvoltage damage, and is the basic equipment for distribution system insulation coordination. The core components of metal oxide arresters (zinc oxide arresters) use zinc oxide resistor discs with excellent nonlinear volt-ampere characteristics. Under normal operating voltage, the current through the arrester is only microampere level. When subjected to overvoltage, the current instantly reaches thousands of amperes, and the arrester is in a conducting state releasing overvoltage energy, effectively limiting overvoltage damage to equipment. HY5WS-3.8/13.5 composite housing arrester combines the technical advantages of organic insulation materials and porcelain housing arresters, featuring good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance, explosion-proof, hydrophobicity, and excellent sealing performance, making it an ideal choice for 3kV distribution system overvoltage protection.

Technical Parameters

Technical Features

• Excellent nonlinear volt-ampere characteristics: Zinc oxide resistor discs are in high impedance state under normal operating voltage, with leakage current only microampere level; during overvoltage, they quickly conduct to release energy, effectively limiting overvoltage amplitude.
• Composite housing design: Uses organic insulation materials, good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance, adapting to complex outdoor climate conditions.
• Good explosion-proof performance: Composite housing material has excellent explosion-proof characteristics, avoiding the explosion risk of traditional porcelain housing arresters during faults, enhancing equipment and personnel safety.
• Excellent sealing performance: Fully sealed structure design effectively prevents moisture and water ingress, ensuring long-term stable operation of resistor discs and extending product service life.
• Large current carrying capacity: Square wave current capacity up to 75A, high current impulse withstand 25kA, capable of withstanding severe lightning overvoltages and switching overvoltages.
• Low residual voltage: Lightning impulse residual voltage only 1.3kV, effectively reducing overvoltage stress on protected equipment, improving system insulation coordination level.

Application Scenarios

HY5WS-3.8/13.5 3kV distribution type zinc oxide arrester is suitable for AC 220kV and below power generation, transmission, transformation and distribution systems, especially for 3kV distribution networks, protecting the insulation of distribution transformers, switchgear, cables, motors and other equipment from overvoltage damage. This product is a key lightning protection component in integrated, modular medium and high voltage transmission and transformation complete equipment, widely used in power systems, industrial and mining enterprises, petrochemical, railway transportation, building and other fields. In lightning-prone areas or occasions with high system switching overvoltage risk, this arrester can reliably operate, limiting overvoltage within the equipment insulation withstand level, ensuring power supply continuity.

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". Each arrester is individually tested for DC reference voltage, leakage current, residual voltage and other key parameters before leaving the factory, ensuring performance indicators meet standard requirements.

Selection Recommendations

Select the appropriate model based on the distribution system rated voltage and protection requirements: HY5WS-3.8/15 is suitable for 3kV system standard protection scenarios, with continuous operating voltage 2.0kV and DC 1mA voltage 7.5kV; HY5WS-5/15 is suitable for occasions requiring higher rated voltage, with continuous operating voltage 4.0kV; HY5CS-3.8/13.5 is a gapped product suitable for specific protection requirements. When selecting, comprehensively consider system rated voltage, arrester rated voltage, continuous operating voltage, residual voltage requirements and other parameters to ensure matching with system insulation levels. It is recommended to reserve appropriate margin during selection to cope with system voltage fluctuations and long-term operation aging factors.

Summary

HY5WS-3.8/13.5 3kV distribution type zinc oxide arrester, with composite housing technology and excellent nonlinear volt-ampere characteristics, provides reliable overvoltage protection for distribution systems. The product complies with GB11032-2000 and other national standards, with advantages of large current carrying capacity, low residual voltage, good sealing performance and explosion-proof capability, making it an ideal choice for 3kV distribution system insulation coordination. This product is widely used in power systems, industrial and mining enterprises and other fields, effectively reducing the risk of lightning and switching overvoltage damage to equipment, improving power supply reliability.