HY(YH)5WS-3~6kV Distribution-Type Surge Arrester
Product Overview
The HY(YH)1.5WS series surge arresters (model numbers HY(YH)1.5WS-3.8/1.5, HY(YH)1.5WS-5/15, HY(YH)1.5WS-7.6/30, HY(YH)1.5WS-10/30) are gapless metal oxide surge arresters designed specifically for 3kV~6kV distribution systems. Encapsulated in a silicone rubber composite housing, these arresters provide excellent lightning and overvoltage protection performance, effectively limiting lightning overvoltages and switching overvoltages to protect distribution lines, transformers, switchgear, and other equipment from damage. They are widely applied in medium- and low-voltage distribution systems.
Product Features
Electrical and Protection Performance
Utilizing high-performance zinc oxide varistors with excellent volt-ampere characteristics, low residual voltage, and high discharge current capacity, these arresters effectively limit lightning overvoltages and switching overvoltages in 3kV~6kV distribution systems, protecting distribution equipment insulation from damage.
Fast response speed enables instantaneous operation upon overvoltage occurrence, promptly discharging lightning current to prevent overvoltage intrusion into equipment, with stable and reliable protection performance.
Excellent nonlinear volt-ampere characteristics result in extremely low leakage current and minimal power loss under normal operating voltage. Under overvoltage conditions, the arrester conducts rapidly and automatically restores to its insulating state after discharging current, requiring no maintenance.
Structural and Safety Features
The integral silicone rubber composite housing is seamless and void-free, with superior sealing performance that effectively prevents moisture and contaminants from entering the interior, eliminating the risk of varistor damage due to moisture ingress.
The integrated modular structural design offers high mechanical strength with impact and vibration resistance, capable of withstanding mechanical stresses during transportation, installation, and operation without risk of deformation or damage.
Factory-fitted upper and lower M10 threaded terminals facilitate easy installation, allowing direct series connection between the distribution line and ground without additional auxiliary equipment, compatible with various installation configurations.
The gapless design eliminates follow current during operation, removing the risk of explosion or fire caused by power-frequency follow current, resulting in a high level of operational safety.
Environmental and Weather Resistance
Excellent weatherability accommodates a wide temperature range of -40°C to +90°C. The silicone rubber housing maintains its elasticity and insulating properties at both high and low temperatures without degradation, cracking, or embrittlement, suitable for both outdoor and indoor applications.
Moisture-proof, waterproof, pollution-resistant, and salt-fog-resistant, these arresters provide long-term stable operation in harsh environments including humid, dusty, and salt-fog conditions. The high hydrophobicity of the silicone rubber surface effectively prevents surface flashover.
Anti-aging, UV-resistant, and ozone-resistant, with a service life exceeding 20 years. Maintenance-free operation reduces long-term operational and maintenance costs.
Mechanical and Compatibility Features
High mechanical strength with impact and vibration resistance allows the arrester to withstand mechanical stresses generated by lightning current impulses without risk of deformation or damage. Seismic resistance rating: Grade 8.
Compatible with 3kV~6kV distribution systems, these arresters can be installed on overhead lines, distribution transformers, switchgear, cable terminations, and various other equipment with strong universality.
Compact size and light weight facilitate easy installation, allowing direct mounting on distribution equipment enclosures or brackets without complex installation procedures.
Technical Parameters
Application Scope
Applicable voltage levels: 3kV~6kV AC distribution systems, covering common medium- and low-voltage distribution voltage levels.
Application scenarios:
Lightning protection for 3kV/6kV overhead distribution lines and cable lines;
Lightning protection for distribution equipment including distribution transformers, pad-mounted substations, ring main units, and cable branch boxes;
Lightning protection for outdoor/indoor distribution rooms, new energy (photovoltaic/wind power) booster stations, and industrial and mining enterprise distribution systems;
Lightning and switching overvoltage protection for low-voltage distribution systems.
Functional purpose: To limit lightning overvoltages and switching overvoltages by discharging lightning current to ground, protecting the insulation of distribution lines and equipment from damage, preventing equipment breakdown and burnout failures caused by overvoltages, and ensuring the safe and stable operation of distribution systems.
Operating Conditions
Normal Operating Conditions
Altitude: ≤2000m;
Ambient temperature: -40°C~+90°C, equipment operating temperature complies with relevant standards;
Relative humidity: ≤100% (non-condensing);
Environmental conditions: free from corrosive gases, flammable or explosive media, and severe vibration or shock;
Installation method: Fixed installation via upper and lower terminals; upper terminal connected to the distribution line/equipment, lower terminal reliably grounded; installation space must satisfy insulation clearance requirements.
Special Operating Conditions (Customization Required)
Altitude exceeding 2000m;
Ambient temperature outside the range of -40°C~+90°C;
Severely polluted, salt-fog, or chemically corrosive environments;
High-vibration or high-shock service conditions;
Non-standard voltage levels or special discharge current capacity requirements.
Installation and Maintenance
Installation Requirements
Prior to installation, inspect the product appearance to ensure the silicone rubber housing is free from cracks, damage, and voids, and that the terminals are intact, free from corrosion and deformation.
Clean terminal surfaces to remove grease, dust, and foreign matter, ensuring terminals are dry and clean. Verify the grounding resistance of the grounding device meets requirements (≤10Ω for 3kV/6kV systems).
Connect the upper terminal of the arrester to the distribution line/equipment and reliably ground the lower terminal. Torque the terminals to the specified value. Upon completion, the arrester shall be installed vertically without looseness or inclination.
After installation, perform insulation resistance testing; the arrester may be energized only after passing inspection.
Maintenance Requirements
Periodically inspect the product appearance to ensure the silicone rubber housing is free from cracks, damage, discharge marks, and contamination buildup; verify terminal connections are secure and tight; confirm grounding connections are reliable and free from corrosion.
Periodically test insulation resistance and leakage current to verify performance meets requirements and to identify potential faults in a timely manner.
Clean the product surface to remove accumulated dust and contaminants, keeping the silicone rubber surface dry and clean, and avoiding exposure to grease and chemical substances.
If anomalies such as cracks, damage, discharge, or out-of-specification insulation resistance are detected, immediately take the unit out of service and replace it. Operation of a defective unit is strictly prohibited.
Precautions
Installation, commissioning, and maintenance must be performed by qualified electrical personnel with medium- and low-voltage distribution work credentials. Operation by unqualified personnel is strictly prohibited.
The product must be used with distribution equipment of the corresponding voltage rating. Mismatching equipment of different voltage levels is strictly prohibited, as this will result in protection failure and safety incidents.
Unauthorized disassembly or modification of the product is strictly prohibited, as this will void the warranty and safety assurance. The use of non-specified tools to forcibly install or remove terminals is strictly prohibited.
During installation, damage to the silicone rubber housing must be avoided. Terminals must be torqued to the specified value to prevent poor contact leading to overheating or discharge.
During storage, the product must be kept in a dry, well-ventilated, cool environment, away from direct sunlight, high temperatures, humidity, and compression. Contact with sharp objects that could damage the silicone rubber housing is strictly prohibited.
During operation, periodically inspect the grounding resistance of the grounding device to ensure reliable grounding and to prevent protection failure due to inadequate grounding.
Model Designation
Applicable Standards and Certifications
International standard: IEC 60099-4, Surge Arresters – Part 4: Metal-oxide surge arresters without gaps for AC systems;
National standards: GB 11032, AC Gapless Metal-oxide Surge Arresters; DL/T 804, Guide for the Application of Metal-oxide Surge Arresters for AC Power Systems;
The product has passed type testing by the National High-Voltage Electrical Apparatus Quality Supervision and Inspection Center and complies with national power industry standards.
After-Sales Service
Product warranty period: 18 months from the date of manufacture, or 12 months from the date of commissioning, whichever occurs first;
Products with quality defects during the warranty period will be repaired or replaced free of charge;
Technical support, installation guidance, and customization services are available (special specifications and special operating condition adaptations).
Document Notes
The technical parameters in this manual are based on standard operating conditions. Special operating conditions require customization according to actual requirements. The product technical agreement and type test report shall prevail as the final reference.
Appendix: Product Outline Drawing
| Parameter Category | Item | HY(YH)1.5WS-3.8/1.5 | HY(YH)1.5WS-5/15 | HY(YH)1.5WS-7.6/30 | HY(YH)1.5WS-10/30 |
|---|---|---|---|---|---|
| Rated Electrical Parameters | System Voltage (Un) | 3kV | 3kV | 6kV | 6kV |
| | Arrester Rated Voltage (Ur, r.m.s.) | 3.8kV | 5kV | 7.6kV | 10kV | |
| | Continuous Operating Voltage (Uc, r.m.s.) | 2.0kV | 4.0kV | 4.0kV | 8.0kV | |
| | DC 1mA Reference Voltage (minimum) | 7.5kV | 7.5kV | 15.0kV | 15.0kV | |
| | Maximum Residual Voltage under Steep-Front Impulse Current (peak) | 17.3kV | 17.3kV | 34.6kV | 34.6kV | |
| | Maximum Residual Voltage under Lightning Impulse Current (peak) | 15.0kV | 15.0kV | 30.0kV | 30.0kV | |
| | Maximum Residual Voltage under Switching Impulse Current (peak) | 12.8kV | 12.8kV | 25.6kV | 25.6kV | |
| | 2000μs Rectangle Wave Discharge Current Capacity | 75A | 75A | 75A | 75A | |
| | 4/10μs High-Current Impulse Withstand Capability | 65kA | 65kA | 65kA | 65kA | |
| | Maximum Leakage Current at 0.75× DC Reference Voltage | 50μA | 50μA | 50μA | 50μA | |
| | Creepage Distance | 145mm | 145mm | 210mm | 210mm | |
| Structural and Material Parameters | Main Materials | Zinc oxide varistors (core), silicone rubber (housing), tin-plated copper (terminals) | Zinc oxide varistors (core), silicone rubber (housing), tin-plated copper (terminals) | Zinc oxide varistors (core), silicone rubber (housing), tin-plated copper (terminals) | Zinc oxide varistors (core), silicone rubber (housing), tin-plated copper (terminals) |
| | Protection Degree | IP65 | IP65 | IP65 | IP65 | |
| | Construction Type | Gapless metal oxide surge arrester | Gapless metal oxide surge arrester | Gapless metal oxide surge arrester | Gapless metal oxide surge arrester | |
| | Terminal Specification | M10 threaded | M10 threaded | M10 threaded | M10 threaded | |
| | Overall Dimensions | Φ85mm×160mm (overall height) | Φ85mm×160mm (overall height) | Φ85mm×190mm (overall height) | Φ85mm×190mm (overall height) | |
| Environmental Parameters | Applicable Altitude | ≤2000m (high-altitude customization available) | ≤2000m (high-altitude customization available) | ≤2000m (high-altitude customization available) | ≤2000m (high-altitude customization available) |
| | Ambient Temperature | -40°C~+90°C (operating), -40°C~+70°C (storage) | -40°C~+90°C (operating), -40°C~+70°C (storage) | -40°C~+90°C (operating), -40°C~+70°C (storage) | -40°C~+90°C (operating), -40°C~+70°C (storage) | |
| | Relative Humidity | ≤100% (non-condensing) | ≤100% (non-condensing) | ≤100% (non-condensing) | ≤100% (non-condensing) | |
| | Seismic Resistance Rating | Grade 8 | Grade 8 | Grade 8 | Grade 8 | |
| Applicable Standards | GB 11032 AC Gapless Metal-oxide Surge Arresters; DL/T 804 Guide for the Application of Metal-oxide Surge Arresters for AC Power Systems | GB 11032 AC Gapless Metal-oxide Surge Arresters; DL/T 804 Guide for the Application of Metal-oxide Surge Arresters for AC Power Systems | GB 11032 AC Gapless Metal-oxide Surge Arresters; DL/T 804 Guide for the Application of Metal-oxide Surge Arresters for AC Power Systems | GB 11032 AC Gapless Metal-oxide Surge Arresters; DL/T 804 Guide for the Application of Metal-oxide Surge Arresters for AC Power Systems | |
| Model Identifier | Meaning | ||||
| HY(YH) | Series designation for composite-housed metal oxide surge arresters | ||||
| 1.5 | Nominal discharge current rating (1.5kA) | ||||
| W | Gapless construction designation | ||||
| S | Distribution-type designation | ||||
| 3~6kV | Applicable system voltage range, covering 3kV to 6kV distribution systems | ||||
| 3.8/1.5, 5/15, 7.6/30, 10/30 | Arrester rated voltage / lightning impulse residual voltage (peak value) |