HY(YH)5WZ-10kV Station-Type Lightning Arrester
Product Overview
The HY(YH)5WZ series lightning arresters (model numbers HY(YH)5WZ-12.7/45, HY(YH)5WZ-16.5/45, HY(YH)5WZ-17/45) are gapless metal oxide surge arresters designed specifically for 10kV power stations and distribution systems. Encapsulated in a silicone rubber composite housing, these arresters provide superior lightning protection and overvoltage suppression performance, effectively limiting lightning overvoltages and switching overvoltages to protect substation equipment, distribution lines, transformers, switchgear, and other apparatus from damage. They are widely applied in 10kV power stations and distribution systems.
Product Features
Electrical and Protective Performance
Utilizing high-performance zinc oxide varistor discs with excellent volt-ampere characteristics, the arresters offer low residual voltage and high impulse current capacity, effectively limiting lightning overvoltages and switching overvoltages in 10kV systems and protecting substation 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 dissipation under normal operating voltage; the device conducts rapidly under overvoltage conditions and automatically restores to insulating state after current discharge, requiring no maintenance.
Structural and Safety Features
The integral silicone rubber composite housing is seamless and void-free, providing excellent sealing performance that effectively prevents moisture and contamination ingress, protecting varistor discs from moisture-induced damage.
The integrated modular structural design offers high mechanical strength with resistance to impact and vibration, capable of withstanding mechanical stresses during transportation, installation, and operation without risk of deformation or damage.
Built-in upper and lower M10 threaded terminal connectors allow convenient installation by direct series connection between the distribution line and ground, requiring no additional auxiliary equipment and accommodating various installation configurations.
The gapless design eliminates follow current during operation, removing the risk of explosion or fire caused by power-frequency follow current, ensuring a high level of operational safety.
Environmental and Weathering Performance
Excellent weathering resistance accommodates a wide temperature range of -40°C to +90°C, with no degradation in elasticity or insulating performance of the silicone rubber housing at extreme temperatures, and no risk of cracking or embrittlement, suitable for both outdoor and indoor substation environments.
Moisture-proof, waterproof, pollution-resistant, and salt-spray resistant, the arrester operates reliably over extended periods in harsh environments including high humidity, dusty conditions, and salt-spray atmospheres, immune to rain and condensation corrosion; the high hydrophobicity of the silicone rubber surface effectively prevents surface flashover.
Anti-aging, UV-resistant, and ozone-corrosion resistant, with a service life exceeding 20 years, enabling maintenance-free operation and reducing long-term operation and maintenance costs.
Mechanical and Compatibility Features
High mechanical strength with resistance to impact and vibration enables the arrester to withstand mechanical stresses generated by lightning impulse currents without risk of deformation or damage; seismic resistance rating of Grade 8.
Compatible with 10kV power stations and distribution systems, mountable on various equipment including substation apparatus, distribution transformers, switchgear, and cable terminations, with strong universality.
Compact size and lightweight design allow convenient installation by direct mounting on equipment enclosures or brackets without complex installation procedures.
Technical Parameters
Applications
Applicable voltage level: 10kV AC power stations and distribution systems.
Applicable scenarios:
Lightning protection for 10kV power station distribution lines and cable lines;
Lightning protection for substation equipment including distribution transformers, switchgear, and cable terminations;
Lightning protection for outdoor/indoor substations, pad-mounted substations, and new energy (photovoltaic/wind power) step-up substations;
Lightning protection for industrial and mining enterprise distribution systems and urban distribution network systems.
Functional purpose: To limit lightning overvoltages and switching overvoltages, discharge lightning current to ground, protect the insulation of power stations, distribution lines, and equipment from damage, prevent equipment puncture and burnout faults caused by overvoltages, and ensure the safe and stable operation of 10kV power stations and distribution systems.
Operating Conditions
Normal Operating Conditions
Altitude: ≤2000m;
Ambient temperature: -40°C to +90°C; equipment operating temperature complies with relevant standards;
Relative humidity: ≤100% (non-condensing);
Environmental conditions: free from corrosive gases, flammable and explosive media, and severe vibration and shock;
Installation method: fixed installation via upper and lower terminal connectors; upper terminal connected to distribution line/equipment, lower terminal reliably grounded; installation space must meet insulation clearance requirements.
Special Operating Conditions (Custom Order Required)
Altitude exceeding 2000m;
Ambient temperature outside the range of -40°C to +90°C;
Severely polluted, salt-spray, or chemically corrosive environments;
High vibration and high shock service conditions;
Non-standard voltage levels or special impulse current capacity requirements.
Installation and Maintenance
Installation Requirements
Before installation, inspect the product appearance to verify the silicone rubber housing is free from cracks, damage, and voids, and that terminal connectors are intact with no corrosion or deformation.
Clean terminal connector surfaces to remove grease, dust, and foreign matter, ensuring terminals are dry and clean; check the grounding resistance of the grounding device to confirm it meets requirements (≤10Ω for 10kV systems).
Connect the upper terminal of the arrester to the distribution line/equipment and reliably ground the lower terminal; tighten terminal connectors to the specified torque; after installation, the arrester shall be mounted vertically with no looseness or tilt.
Upon completion of installation, conduct insulation resistance testing; the arrester may be energized only after passing the test.
Maintenance Requirements
Periodically inspect product appearance to verify the silicone rubber housing is free from cracks, damage, discharge marks, and accumulated contamination; confirm terminal connections are secure with no looseness and grounding connections are reliable with no corrosion.
Periodically test insulation resistance and leakage current to ensure performance meets requirements and to detect potential faults in a timely manner.
Clean product surfaces to remove accumulated dust and contamination, keeping the silicone rubber surface dry and clean, and preventing corrosion by grease and chemical substances.
If anomalies such as cracks, damage, discharge, or out-of-specification insulation resistance are detected, immediately decommission and replace the product; operation with known defects is strictly prohibited.
Precautions
The product must be installed, commissioned, and maintained by qualified electrical professionals with medium-voltage distribution work certification; operation by non-qualified personnel is strictly prohibited.
The product must be used with distribution equipment of the corresponding voltage level; mismatching equipment of different voltage levels is strictly prohibited, as it will result in protection failure and safety incidents.
Unauthorized disassembly or modification of the product is prohibited, as it will void the warranty and safety assurance; using non-standard tools to forcibly install or remove terminal connectors is strictly prohibited.
During installation, damage to the silicone rubber housing is strictly prohibited; terminal connectors must be tightened to the specified torque to prevent heating and discharge caused by poor contact.
During storage, the product must be kept in a dry, well-ventilated, and cool environment, away from direct sunlight, high temperatures, moisture, and compression; contact with sharp objects that may damage the silicone rubber housing is strictly prohibited.
During operation, periodically check the grounding resistance of the grounding device to ensure reliable grounding and prevent protection failure caused by inadequate grounding.
Model Designation
Applicable Standards and Certifications
International standard: IEC 60099-4, Surge Arresters — Part 4: Metal-oxide surge arresters without gaps for a.c. systems;
National standards: GB 11032, Metal-oxide surge arresters without gaps for a.c. systems; 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 comes first;
During the warranty period, products with quality defects 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 Dimensional Diagram
| Parameter Category | Item | HY(YH)5WZ-12.7/45 | HY(YH)5WZ-16.5/45 | HY(YH)5WZ-17/45 |
|---|---|---|---|---|
| Rated Electrical Parameters | Applicable System Voltage (Un) | 10kV | 10kV | 10kV |
| | Arrester Rated Voltage (Ur, r.m.s.) | 12.7kV | 16.5kV | 17kV | |
| | Continuous Operating Voltage (Uc, r.m.s.) | 6.6kV | 12.7kV | 13.6kV | |
| | DC 1mA Reference Voltage (minimum) | 24kV | 24kV | 24kV | |
| | Maximum Residual Voltage under Steep-Front Impulse Current (peak) | 51.8kV | 51.8kV | 51.8kV | |
| | Maximum Residual Voltage under Lightning Impulse Current (peak) | 45kV | 45kV | 45kV | |
| | Maximum Residual Voltage under Switching Impulse Current (peak) | 38.3kV | 38.3kV | 38.3kV | |
| | 2000μs Rectangular Wave Current Withstand Capability | 150A | 150A | 150A | |
| | 4/10μs High-Current Impulse Withstand Capability | 65kA | 65kA | 65kA | |
| | Maximum Leakage Current at 0.75× DC Reference Voltage | 50μA | 50μA | 50μA | |
| | Creepage Distance | 360mm | 360mm | 360mm | |
| Structural and Material Parameters | Main Materials | Zinc oxide varistor discs (core), silicone rubber (housing), tin-plated copper (terminal connectors) | Zinc oxide varistor discs (core), silicone rubber (housing), tin-plated copper (terminal connectors) | Zinc oxide varistor discs (core), silicone rubber (housing), tin-plated copper (terminal connectors) |
| | Protection Degree | IP65 | IP65 | IP65 | |
| | Structural Type | Gapless metal oxide surge arrester | Gapless metal oxide surge arrester | Gapless metal oxide surge arrester | |
| | Terminal Connector Specification | M10 threaded | M10 threaded | M10 threaded | |
| | Overall Dimensions | Φ95mm × 260mm (total height) | Φ95mm × 260mm (total height) | Φ95mm × 260mm (total height) | |
| Environmental Parameters | Applicable Altitude | ≤2000m (high-altitude version available on request) | ≤2000m (high-altitude version available on request) | ≤2000m (high-altitude version available on request) |
| | Ambient Temperature | -40°C to +90°C (operating), -40°C to +70°C (storage) | -40°C to +90°C (operating), -40°C to +70°C (storage) | -40°C to +90°C (operating), -40°C to +70°C (storage) | |
| | Relative Humidity | ≤100% (non-condensing) | ≤100% (non-condensing) | ≤100% (non-condensing) | |
| | Seismic Resistance Rating | Grade 8 | Grade 8 | Grade 8 | |
| Applicable Standards | GB 11032, Metal-oxide surge arresters without gaps for a.c. systems; DL/T 804, Guide for the application of metal-oxide surge arresters for AC power systems | GB 11032, Metal-oxide surge arresters without gaps for a.c. systems; DL/T 804, Guide for the application of metal-oxide surge arresters for AC power systems | GB 11032, Metal-oxide surge arresters without gaps for a.c. systems; 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 | |||
| 5 | Nominal discharge current rating (5kA) | |||
| W | Gapless structure designation | |||
| Z | Station-type (medium-voltage system) designation | |||
| 10kV | Applicable system voltage level, 10kV power stations and distribution systems | |||
| 12.7/45, 16.5/45, 17/45 | Arrester rated voltage / lightning impulse residual voltage (peak value) |