Distribution surge arresters protect electrical equipment in power transmission and distribution systems by diverting excessive surge currents from lightning, switching operations, or equipment failures to ground, limiting voltage on connected apparatus. These devices utilize zinc oxide blocks as their core material, with high-performance metal oxide elements enabling effective over-voltage protection. Polymer-housed designs combine organic materials for enhanced durability and environmental resistance.
Key specifications include Maximum Continuous Operating Voltage (MCOV) ratings such as 10.2 kV and discharge voltage levels that vary with current—for example, 30.3 kV at 1.5 kA. The devices operate at frequencies between 48-62 Hz and feature creepage and leakage distances up to 431.8 mm. The zinc-oxide elements allow for reduced product size and weight, supporting efficient space utilization and lower shipping costs without compromising protective capabilities.
These arresters prevent damage to transformers, switchgear, and other components by offloading destructive electrical surges, maintaining operational continuity and contributing to equipment longevity. They are installed in power distribution switchgear, transformers, substations, Gas Insulated Substations (GIS), and transmission lines—commonly positioned near transformers or between live conductors and earth in both indoor and outdoor settings to provide comprehensive over-voltage protection.
Distribution Surge Arrester Manufacturer
RaxPower is your solution to accessing competitive global markets. With over 21 years of experience in power line hardware, we provide the highest quality distribution surge arresters. These devices safeguard electrical equipment in power transmission and distribution systems by diverting destructive surges to ground.
Our distribution surge arresters are engineered to handle all system stresses and are tested for anticipated service conditions. They offer several key advantages:
- High energy absorption capabilities
- Compatibility with grounded or effectively ungrounded systems
- Rigorous quality control measures to ensure reliability
We focus on quality and meeting exact customer specifications. Our products have been shipped to America, South America, Africa, and South Asia, demonstrating our global reach and expertise in delivering reliable surge protection solutions for distribution networks.
| Parameter | Value |
|---|---|
| Rated System Voltage | 6 kV |
| Nominal Discharge Current | 2,500 A |
| Maximum Continuous Operating Voltage (MCOV) | 10.2 kV |
| Frequency Rating | 48-62 Hz |
| Creep and Leakage Distance | 431.8 mm |
| Core Material | Zinc Oxide |
| Housing Type | Polymer |
| Duty Cycle | 12 kV |
| Maximum .5 Microsecond Discharge Volts @ Classifying Current | 40.4 kV |
| Maximum Discharge Voltage | 30.3 kV @ 1.5 kA, 32.3 kV @ 3 kA, 34.2 kV @ 5 kA, 37.6 kV @ 10 kA, 42.3 kV @ 20 kA, 50.3 kV @ 40 kA |
| Maximum Switching Surge Protective Level @ 500A | 29.0 kV |
| Pressure Relief Capability-Symmetrical rms | 20 kA |
| Voltage – Line | 13.2 kV |
Frequently Asked Questions (FAQS)
What is a distribution surge arrester and how does it work?
A distribution surge arrester is a protective device that safeguards electrical equipment in power systems from over-voltage transients caused by lightning, switching, or equipment failures. It diverts destructive surges to ground, restricting voltage on equipment and preventing damage. RaxPower's arresters use advanced zinc-oxide blocks to efficiently absorb and divert surge currents, protecting transformers, switchgear, and other critical components in distribution networks.
What are the different types of surge arresters and their applications?
Surge arresters are categorized by electrical range and application. Type 1 arresters handle heavy surges from direct lightning strikes and integrate with lightning protection systems. Type 2 arresters protect against indirect lightning and switching surges, commonly used in residential and commercial installations. Type 3 arresters manage low-level surges for specific devices in complex systems. RaxPower offers distribution surge arresters aligned with these categories for various protection scenarios.
What factors should be considered when selecting a distribution surge arrester?
Key selection factors include system voltage characteristics (continuous operating voltage, transitory overvoltages, switching surges), anticipated service conditions, grounding configuration (grounded or effectively ungrounded), and system setup (wye or delta). The arrester's nominal ratings must align with system voltage and design requirements. The Maximum Continuous Operating Voltage (MCOV) is particularly critical—it defines the voltage limit the arrester can handle continuously without degradation. RaxPower's arresters feature appropriate MCOV ratings, such as 10.2 kV, to ensure optimal performance and long-term reliability.
What are the typical specifications for a distribution surge arrester?
Typical specifications include voltage ratings such as 13.2 kV line voltage, MCOV of 10.2 kV, discharge voltages at various currents (e.g., 30.3 kV at 1.5 kA), creep and leakage distance around 431.8 mm, frequency rating of 48-62 Hz, and pressure relief capability. RaxPower's distribution surge arresters meet these specifications, providing high energy absorption and reliable protection for power distribution systems.
How is a distribution surge arrester installed?
Installation depends on the model and application. For outdoor use, the arrester is typically installed near the transformer, acting as a hub between the power line and transformer to divert surges to ground. For indoor models, it is installed between live conductors and earth, similar to an electrical switch. RaxPower recommends following specific installation guidelines to ensure proper functionality and safety.
How do your surge arresters ensure compliance with international standards?
RaxPower's surge arresters undergo rigorous testing, including Gauges Tests according to IEC 120 standards, Load Tests using different machines, and SGS certification. Our quality assurance includes strict raw material selection, multi-stage testing, galvanization tests for durability, and double review before packing to ensure 100% quality and consistent reliability.
What range of distribution surge arresters do you offer, and how competitive are your wholesale pricing options?
RaxPower provides a comprehensive variety of distribution surge arresters with different models and specifications for diverse applications. Our competitive pricing strategy ensures attractive wholesale rates, helping distributors and importers maintain profit margins while offering a broad product catalog.
What is your capability for handling large-volume project orders and ensuring on-time delivery?
With over 21 years of experience, RaxPower utilizes automatic machines to maintain sizing accuracy and uniformity, ensuring on-time delivery. We manage the complete supply chain from global sourcing to shipping, guaranteeing that large-scale project orders meet exact specifications.
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