12KV Polymer Surge Arrester
In the power system, lightning overvoltage and operational overvoltage are "invisible killers" that threaten the safety of equipment such as transformers, switchgear, and cables. The 12KV polymer surge arrester launched by SARAH Electric, a professional supplier, is very suitable for medium voltage distribution scenarios. It uses high-performance zinc oxide resistors as the core to provide all-weather lightning protection for equipment, which can ensure stable operation of the power system.
SARAH Electric's high-quality 12KV polymer surge arrester, with "voltage limiting, leakage, recovery, and safety" as its core, builds a lightning protection "firewall" for medium voltage distribution equipment. It is the reliable "guardian" for transformers, cables, and switchgear.
Product parameters
| Model No. |
Rated Voltage |
Rated Current |
MCOV | Current Impulse Residual Voltage |
Long Impulse Withstand Current 2000 μs |
4/10μs High Current Impulse Withstand |
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1/4 μs Steep Current Impulse |
8/20μs Lightning Current impulse |
30/60μs Switching Current Impulse |
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| kV(rms) | kA(rms) | kV(rms) | kV(crest) | kV(crest) | kV(crest) | kA(crest) | kA(crest) | |
| YH5W-12 | 12 | 5kA | 10.2 | 42.2 | 36 | 27 | 150 | 65 |
| YH10W-12 | 12 | 10kA | 10.2 | 42.2 | 36 | 27 | 250 | 100 |
Function
1. Voltage limiting protection: Under normal voltage, 12KV Polymer Surge Arrester presents a high resistance insulation state and is non-conductive; When lightning strikes or overvoltage occurs, it instantly switches to low resistance conduction, clamping the dangerous voltage within the safe range of the equipment to avoid insulation breakdown.
2. Rapid leakage: By optimizing the internal structural design, lightning current can be quickly introduced into the ground, with a leakage capacity covering 5kA~10kA (effective value), which can release overvoltage energy in a timely manner.
3. Automatic recovery: After the overvoltage disappears, the high resistance insulation state is automatically restored without affecting the normal power supply of the system and without the need for manual intervention.
4. No continuous current, no explosion, and no combustion: Using zinc oxide resistor technology, it does not generate power frequency continuous current, does not trip or explode after operation, ensuring the safety of equipment and personnel.
Product advantages
Provide multiple specifications and models (such as YH5W-3, YH10W-36, etc.) including 3kV, 6kV, 9kV, 12kV, 15kV, 18kV, 21kV, 24kV, 27kV, 30kV, 33kV, 36kV, etc., to meet the requirements of different voltage levels.
Taking YH10W-36 as an example, the rated voltage is 36kV, the maximum continuous operating voltage (MCOV) is 29.0kV, the steep wave residual voltage is 117kV, the lightning impulse residual voltage is 103kV, the operating impulse residual voltage is 92.4kV, the long-term continuous current withstand is 250kA (peak), and the 4/10 μ s high current withstand is 100kA (peak).
Divided into two rated current specifications of 5kA and 10kA, suitable for different leakage demand scenarios, such as distribution networks, substations, industrial infrastructure, etc.
Application
Distribution network: 10kV, 35kV lines, pole mounted transformers, substation areas, and box type substations.
Substation: 3-35kV switchgear, transformers, circuit breakers, busbar protection.
Industrial/infrastructure: factories, mines, residential areas, photovoltaic/wind power box transformers, cable terminals.
Outdoor equipment: pole mounted switch, ring main unit, cable branch box.
What are the common errors when installing 12KV Polymer Surge Arrester?
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Common Errors |
Consequences |
Correct Practices |
|
Excessive grounding wire length |
Increased residual voltage; significantly reduced protective performance |
Keep the grounding wire as short as possible (≤0.5 m) |
|
Insufficient grounding wire cross-sectional area |
Grounding wire heats up or even melts during a lightning strike |
Copper wire ≥16 mm²; aluminum wire ≥25 mm² |
|
Excessive grounding resistance |
Ineffective lightning current discharge; increased residual voltage |
Ensure grounding resistance ≤10 Ω |
|
Failure to install a disconnector |
Faulty arrester cannot automatically isolate |
Always install a matching disconnector |
|
Under-specification of Ur/Uc ratings |
Thermal runaway under temporary overvoltage |
Select the correct model based on the system grounding method |
|
Improper installation angle (tilted) |
Poor sealing; moisture ingress |
Install vertically; ensure deviation is within manufacturer specifications |
|
Down-conductor routed through iron conduit |
Circulating currents in the iron pipe; increased surge impedance |
Use non-magnetic materials or avoid routing through conduits |
|
Failure to apply altitude correction |
Insufficient insulation at high altitudes |
Derate according to standards for altitudes >2,000 m |
Shipment and Service
Spot supply: Regular models (such as YH10W-10, YH5W-35, etc.) have sufficient inventory and support same day shipment.
Customized service: Provide 72 hour fast customization service for special voltage levels or installation environments.
Global delivery: SARAH supports multiple logistics methods such as air and sea freight, covering overseas markets such as Southeast Asia, the Middle East, and Africa.
Hot Tags: 12kV Polymer Surge Arrester, Polymer Surge Arrester Manufacturer, 12kV Lightning Arrester
Send Inquiry
Contact Info
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Address
No.101-103, Fu Hua Road, Leshang Chuangye Yuan, Wengyang Industrial Zone, Yueqing, Wenzhou, Zhejiang, China
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For inquiries about electrical transformer, surge arrester, fuse cutout or price list, please leave your email to us and we will be in touch within 24 hours.
