Metal Oxide Surge Arrester Manufacturer, No the Middleman!
ZnO Arresters – Lightning-Fast Protection.
Reliable Surge Defense, Powered by Zinc Oxide.
500,000 Units Annually – Trusted Global Supply Capacity
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What is a Metal Oxide Surge Arrester
Metal Oxide Surge Arrester (MOSA) is a highly efficient overvoltage protection device based on zinc oxide (ZnO) valve plates, mainly used to suppress lightning or operational overvoltage in power systems (such as substations, transmission lines or new energy stations). Its core is composed of ZnO valve plates with nonlinear resistance characteristics – it is in a high resistance state (extremely small leakage current) when working normally, but can be transformed into a low resistance state within nanoseconds when encountering overvoltage, quickly directing destructive surge energy into the earth, and then automatically restoring insulation, thereby protecting key facilities such as transformers and switchgear from damage.
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Metal Oxide Surge Arrester Type
We provide high-performance Metal Oxide Surge Arresters (MOSA) designed to deliver ultimate overvoltage protection and system reliability.
3.3kV Metal Oxide Surge Arrester
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11kV Metal Oxide Surge Arrester
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15kV Metal Oxide Surge Arrester
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21kV Metal Oxide Surge Arrester
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24kV Metal Oxide Surge Arrester
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30kV Metal Oxide Surge Arrester
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33kV Metal Oxide Surge Arrester
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36kV Metal Oxide Surge Arrester
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Substation Metal Oxide Surge Arrester
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ISO-Certified Production & Full Compliance Type Test Report
Our factory is ISO 9001:2015 certified, ensuring: Standardized Production
Controls, Traceable Quality Management, Consistent Compliance with
International Standards. Product report verifies that the product has passed all
required type tests according to IEC/GB/Industry Standard.
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Trusted by Global Leaders in Power Transmission
Join 1000+ satisfied clients who trust critical infrastructure to our expertise.
Request your project consultation today!
"The MOSA units from yuanneng have performed exceptionally well in our substation projects. Their fast response time and high energy absorption capacity effectively protected our equipment from multiple lightning strikes. Even after severe weather events, the arresters showed no degradation—proof of their durability."
"We needed surge arresters that meet both IEC standards for a high-voltage transmission project. Yuanneng delivered a perfect fit—tested for extreme conditions and certified for safety. Their technical team even provided coordination studies to ensure optimal protection levels."
"Beyond supplying high-quality arresters, Yuanneng provided outstanding post-sale support. Their engineers assisted with installation best practices and offered real-time monitoring recommendations. A truly partnership-driven supplier!"
"It’s not just the quality (which is top-notch), but how you handle issues. Last-minute order changes? Urgent replacements? Your team delivers. That’s why we stick with you."
From Start to Finish, We’re By Your Side
Whether you’re just beginning your project or nearing the finish line, count
on us to stand with you—offering guidance, support, and unwavering
commitment. Because your success is our mission, and your story is ours, too.
Together, every step matters.
Components of Metal Oxide Surge Arrester
ZnO Varistor Block: Non-linear volt-ampere characteristics (low resistance at high voltage, high resistance at low voltage), quickly absorb overvoltage energy.
Silicone Rubber Housing: Modern mainstream, light weight, explosion-proof, resistant to dirt, suitable for harsh environments.
Bracket/base: fix the lightning arrester and ensure the insulation distance to the ground.
Disconnector (fault indication) :Mechanical/thermal type, automatically disconnects and marks when the arrester fails.
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Essential MOV
High-purity zinc oxide is used, the formula is optimized, and the surface is treated after the molding process and sintering process to prepare the electrode. The resistor is fully tested for DC reference voltage, leakage current and energy tolerance.
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Vulcanization/Injection Molding
The process begins with the pre-assembled ZnO resistor column being placed into a precision mold. A two-component liquid silicone rubber is injected under pressure to encapsulate the core. The mold is then transferred to a heated press (150–180°C) for 10–20 minutes, where the silicone undergoes peroxide-initiated crosslinking, forming a dense, elastic structure.
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Assemblying Metal Oxide Surge Arrester
The manufacturing process of copper castings includes model making, sand mold making, pouring, cooling, cleaning and other steps. In the entire production process, each link needs to be strictly controlled to ensure that the quality of copper castings meets the design requirements.
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Quality Assurance & Testing Process
Before shipment, all products undergo strict random inspections, covering: Dimensions & Appearance, Electrical Performance, Accessories Accuracy, etc. Only fully compliant products are approved for delivery, backed by a Final Inspection Report. Quality isn’t optional—it’s guaranteed.
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Get A Customized Solution
Our surge arresters are engineered for low residual voltage and weather-resistant construction, ideal for pole-mounted transformers, distribution lines,
and industrial power systems
Choose A Surge Arrester With Easy
01. Submit Your Requirement
Tell us your voltage class, creepage distance, and mounting needs – we’ll match the perfect surge arrester model.
02. Receive Tailored Solutions
Get technical drawings, and a competitive quote within 24 hours.
03. Confirm & Start Production
Approve the final design, and we’ll launch mass production with 100% quality assurance.
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