Rubber housed surge arresters protect electrical power systems from transient overvoltages caused by lightning strikes or switching operations. The housing uses silicone rubber or polymer materials that provide robust insulation and environmental resistance for outdoor applications. Hydrophobic properties prevent conductive moisture formation, while fire-retardant characteristics enhance safety.
Construction features direct-molded silicone rubber housing over metal oxide varistor (MOV) blocks, often reinforced with Fiber Reinforced Polymer (FRP). The design ensures effective sealing against moisture ingress and partial discharges, delivering high pollution and tracking resistance. Lightweight construction facilitates easier handling and installation with flexible mounting options.
The gapless zinc oxide varistor core rapidly diverts surge currents to ground when voltages exceed predefined thresholds, limiting overvoltages to safe levels. Units offer high energy absorption with nominal discharge currents typically rated at 10 kA or higher. Creepage distances meet heavy pollution class requirements per International Electrotechnical Commission (IEC) 60099-4 and ANSI/IEEE C62.11 standards.
Applications include protection of transformers, switchgear, circuit breakers, distribution networks, railway systems, and substations. Maintenance-free operation and long service life reduce lifecycle costs while ensuring reliable performance across diverse environmental conditions.
Enhance Grid Reliability with RaxPower’s Rubber Housed Surge Arrester Supplier
We are RaxPower, a leading manufacturer and supplier specializing in high-quality electrical solutions.
Our Rubber Housed Surge Arrester combines the benefits of silicone rubber material and zinc oxide resistor sheet, resulting in reliable voltage tolerance with excellent sealing performance for moisture-proof and explosion-proof properties. It features a long creepage distance to safeguard electrical appliances from overvoltage and overcurrent, ensuring long-lasting use and protection for connected equipment.
With over 21 years of experience since our establishment in 2003, we provide reliable, innovative, and customizable products tailored to international standards. Our commitment to quality is supported by a professional team of over 170 employees, including 10 professional engineers and 30 professional technicians, dedicated to research, development, and manufacturing in our 17,000 square meter production facilities.
Applications include electric power, communication, traffic, and factory industries, enhancing power distribution and grid reliability worldwide. Let us customize a solution using YH5WS-17/50 or similar models for your project.
| Parameter | Value |
|---|---|
| Rated Voltage | 18 kV to 444 kV |
| Maximum Continuous Operating Voltage (MCOV) | 13.6 kV to 396 kV |
| System Voltage Range | Distribution to High Voltage (24 kV to 550 kV) |
| Nominal Discharge Current | 10 kA |
| Residual Voltage at 5 kA, 8/20 µs | ≤ 90 kV (at 33 kV rated voltage) |
| Energy Absorption Capability | 5.0 kJ/kV of MCOV |
| Creepage Distance | ≥ 1082 mm (for 33 kV rated voltage, heavy pollution class) |
| Housing Material | Silicone Rubber |
| Standards Compliance | IEC 60099-4, ANSI/IEEE C62.11 |
| Mechanical Strength (Cantilever Strength) | 1600 Nm to 9000 Nm |
| Short-Circuit Withstand Current | 50 kA |
Frequently Asked Questions (FAQS)
What is a rubber housed surge arrester and how does it protect electrical systems?
Rubber Housed Surge Arresters protect electrical power systems from transient overvoltages by diverting surge currents safely to the ground. This shields equipment and installations from voltage spikes caused by lightning strikes or switching operations. The silicone rubber housing provides high hydrophobicity, UV resistance, fire-retardant properties, excellent tracking resistance, and superior insulation, ensuring maintenance-free operation and enhanced safety without risk of fragmentation.
What types of equipment can be protected by rubber housed surge arresters?
RaxPower rubber housed surge arresters protect transformers, switchgear, circuit breakers, distribution networks, generators, motors, capacitor banks, cables, and rail electrification systems. They are suitable for substations, industrial plants, and transportation networks.
Which international standards do RaxPower rubber housed surge arresters comply with?
RaxPower surge arresters comply with IEC 60099-4 for AC systems, EN 50526-1 for DC systems, and ANSI/IEEE C62.11. They undergo rigorous testing for energy absorption, short-circuit performance, fire resistance per DIN EN 45545-2, and shock and vibration tests per IEC 61373.
How should rubber housed surge arresters be installed for optimal performance?
Install RaxPower surge arresters close to equipment terminals to reduce lead length and improve protective response. They can be mounted vertically, horizontally, or at any angle with no minimum phase clearance requirements. Ensure proper grounding and follow guidelines for polluted or harsh environments.
What is the expected service life and how do they perform in harsh environments?
Under standard IEC conditions, RaxPower surge arresters have a service life of 20 years or more. The silicone rubber housing is highly pollution-resistant and hydrophobic, with long creepage distances meeting heavy pollution class requirements. They excel in coastal areas, high-humidity zones, salt fog, industrial pollution, and desert conditions, with routine inspections ensuring continued reliability.
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