HY1.5W-0.28/1.3 Low Voltage Distribution Type Zinc Oxide Arrester Composite Housing Technology

Product Overview

Lightning overvoltage and switching overvoltage are the main causes of insulation breakdown and equipment burnout in low voltage distribution systems. The HY1.5W-0.28/1.3 low voltage distribution type zinc oxide arrester is specially designed for 0.22kV AC distribution systems, adopting composite housing technology and metal oxide nonlinear resistor discs to limit overvoltage amplitude within the equipment insulation withstand level. Under normal operating voltage, the leakage current of this arrester is only microampere level. When subjected to overvoltage, it instantly conducts to release energy, effectively protecting distribution transformers, switchgear, metering devices and other electrical equipment.

Organic housing metal oxide arresters combine the technical advantages of composite insulation materials and porcelain housing arresters. In addition to excellent nonlinear volt-ampere characteristics, they also feature high dielectric strength, anti-tracking, aging resistance, explosion-proof, good hydrophobicity and other properties. As the core component of lightning protection in low voltage distribution systems, HY1.5W-0.28/1.3 is widely used in power generation, transmission, transformation and distribution systems, and is an ideal lightning protection component for integrated, modular transmission and transformation complete equipment.

Main Technical Parameters

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".

Outline Dimensions

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 current carrying capacity reaching thousands of amperes, effectively limiting overvoltage amplitude.
• Strong composite housing insulation performance: Organic housing material has high dielectric strength, anti-tracking, anti-corrosion, heat resistance and cold resistance, adapting to complex outdoor climate conditions and extending product service life.
• Large current carrying capacity and low residual voltage: Square wave current capacity 75A, high current impulse withstand 25kV, lightning impulse residual voltage only 1.3kV, protection level superior to similar products.
• Fully sealed explosion-proof structure: Composite housing tightly bonded with metal oxide core, good sealing performance, effectively preventing moisture ingress, with explosion-proof capability, safe and reliable operation.
• Maintenance-free design: Product does not require regular inspection and maintenance, can operate stably for long term after installation, reducing distribution system operation and maintenance costs.

Application Scenarios

HY1.5W-0.28/1.3 low voltage distribution type zinc oxide arrester is suitable for overvoltage protection in 0.22kV AC distribution systems. Typical application scenarios include: low voltage side protection of distribution transformers, lightning protection of switchgear and ring main units, overvoltage protection of energy metering boxes, street lighting and landscape lighting distribution systems, industrial plant low voltage distribution lines, building distribution systems, etc. As a key component of low voltage distribution system lightning protection, this arrester can effectively suppress lightning wave intrusion and switching overvoltage impact on electrical equipment.

Applicable Standards

The product strictly follows the following standard systems: GB11032-2000 "AC Gapless Metal Oxide Arresters", JB/T8459-1996 "Arrester Product Model Designation Method", 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 corresponding model based on the system voltage level: HY1.5W-0.28/1.3 for 0.22kV distribution systems, HY1.5W-0.5/2.6 for 0.38kV distribution systems. When selecting, verify that the arrester rated voltage is not less than 1.25 times the system maximum operating voltage, and the continuous operating voltage is not less than the system phase voltage. For lightning-prone areas or important load locations, it is recommended to install at both the power incoming end and the front end of key equipment for graded protection.

Summary

The HY1.5W-0.28/1.3 low voltage distribution type zinc oxide arrester, with composite housing technology and metal oxide nonlinear resistor technology, provides reliable overvoltage protection solutions for 0.22kV distribution systems. The product combines advantages of large current carrying capacity, low residual voltage and maintenance-free operation, strictly complying with GB11032-2000 standard, and is basic equipment for lightning protection in low voltage distribution systems.