The elbow surge arrester integrates surge suppression capabilities within a separable connector housing to protect transformers, cables, and other components from transient surges caused by lightning or switching operations. A metal oxide varistor (MOV) core rapidly diverts excess energy to ground, utilizing zinc oxide valve slices with nonlinear resistance characteristics for effective surge energy absorption while maintaining insulation integrity.
The housing is constructed from Ethylene Propylene Diene Monomer (EPDM) rubber with a fully shielded design and semi-conductive outer layer meeting ANSI/IEEE Standard 592 requirements. The product adheres to IEEE 386, ensuring full interchangeability with compatible 200 A loadbreak or deadbreak separable connectors. Voltage specifications range from 15 kV to 35 kV with corresponding Maximum Continuous Operating Voltages (MCOV), such as 12.7 kV RMS for 15 kV models.
Performance features include fast response times and high current capacity, with maximum discharge voltages of 48 kV at 1.5 kA and 68 kV at 20 kA for certain models. The MOV technology enables low residual voltage and efficient steep wave suppression. Durability is validated through high current tests up to 40 kA and duty cycle performance of 22 surges at 5 kA, maintaining discharge voltage increase below 10%.
Applications include pad-mounted transformers, vaults, switching devices, and underground distribution systems, particularly at loop system open points or radial system ends. Physical dimensions vary by voltage rating, with 15 kV models measuring approximately 7.0 inches and higher voltage units extending to 14.5 inches, enabling installation in confined spaces.
Expert Elbow Surge Arrester Supplier with 20+ Years Experience
As the professional manufacturer of surge arrester, composite insulator and fuse cutout with over 20 years Power T&D industry experience, RaxPower has been supplying to electrical utilities and electrified railways all over the world. Based in Hebei Province, China, we leverage our extensive production facilities and technical expertise to deliver reliable solutions.
Our Expertise in Elbow Surge Arresters
We specialize in the professional design, manufacture, and consultation of high-quality Elbow Surge Arresters. Our products are engineered to meet IEEE386 and IEC standards, featuring robust components like EPDM insulation, semi-conductive shields, and zinc oxide arrester cores, ensuring optimal performance in medium voltage networks for transformers, switchgears, and cables.
Quality and Reliability
With a commitment to international certifications and strict quality control, RaxPower employs advanced manufacturing processes such as hot forging and multi-stage testing. This ensures every Elbow Surge Arrester offers superior durability, safety, and longevity, backed by our ISO-compliant practices.
Customer-Centric Services
We provide comprehensive sales and consultation services to help you make informed purchase decisions and obtain the best value for your investment. Our team supports you from selection to installation, ensuring seamless integration.
For more information, contact us via email or download our product catalog today.
| Parameter | Value |
|---|---|
| Nominal System Voltage | 15 kV, 25 kV, 35 kV |
| Maximum Continuous Operating Voltage (MCOV) | 12.7 kV RMS |
| Maximum Discharge Voltage at 1.5 kA | 48 kV |
| Maximum Discharge Voltage at 3 kA | 51 kV |
| Maximum Discharge Voltage at 5 kA | 54 kV |
| Maximum Discharge Voltage at 10 kA | 60 kV |
| Maximum Discharge Voltage at 20 kA | 68 kV |
| Material | EPDM rubber |
| Housing Standard | ANSI/IEEE 592 |
| Arrester Standard | IEEE 386 |
| Ground Lead | 4 AWG, withstands 10,000 A for 10 cycles |
| High Current Short Duration Test | 40 kA |
| Low Current Long Duration Test | 75 A for 20 surges |
| Duty Cycle | 22 discharges at 5 kA with 8/20 μs wave |
| Response Time | Fast |
| Length (for 15 kV model) | 7.0 inches |
| Weight (for 15 kV model) | 3.0 lbs |
Frequently Asked Questions (FAQS)
What is an elbow surge arrester?
The RaxPower Elbow Surge Arrester is designed to provide overvoltage system protection by combining a metal oxide varistor module within a rubber elbow. It safeguards equipment like transformers, cables, and switching devices from lightning strikes, switching surges, and overvoltages in underground distribution systems.
What are the key features and construction?
Key features include EPDM rubber construction with a semi-conductive shield meeting ANSI/IEEE Standard 592, full shielding and submersibility, compact size for easy installation in existing cabinetry, IEEE 386 interfaces for energized connection with 200A loadbreak or deadbreak components, and a zinc oxide varistor core providing excellent nonlinear resistance and fast response to surges.
What voltage ratings are available?
The arrester is available in voltage ranges from 15 kV to 35 kV, including nominal 15kV, 25kV, and 35kV systems, ensuring compatibility with diverse underground distribution applications.
Where can it be installed?
The RaxPower Elbow Surge Arrester is used in pad-mounted transformers, entry cabinets, vaults, switching devices, and other insulations. It is typically installed at both ends of an open point on a loop system and at the end of a radial system to protect equipment and prolong cable life.
How does the grounding system work?
The arrester includes a #4 AWG ground lead tethered to the jacket, which withstands 10,000 A for 10 cycles without fusing. This ground lead controls the end plug when ejected, preventing uncontrolled trajectory and maintaining the housing shield ground connection after failure.
What performance and reliability testing does it undergo?
Meeting IEEE 386 standards, each unit undergoes rigorous testing including high current-short duration tests (40kA surges), low current-long duration tests, and duty cycle tests. It remains thermally stable with less than a 10% increase in discharge voltage after multiple discharges, ensuring reliable protection in harsh grid environments and consistent quality across all production batches.
Will it fit into existing equipment without modification?
Yes, the compact design enables installation in existing cabinetry, and the arrester is fully interchangeable with competitors' products that align with IEEE 386 interfaces. This ensures seamless integration without modifications, reducing installation time and costs.
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