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12KV Silicone Surge Arrester

This distribution class surge arrester is designed for 12kV (system voltage) applications, capable of discharging high-energy transient surges up to 5kA (standard 8/20μs impulse current). Its 360mm creepage distance ensures reliable insulation performance in polluted or humid environments, complying with IEC 60099-4 or IEEE C62.11 standards.
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Technical Parameters:

Product Name: Silicone Surge Arrester, is also named Polymer Surge Arrester, Oxide Zinc Surge Arrester, Composite Lightning Arrester.

Product Type: 12KV 5KA-360mm

Rated voltage:  12kv

Norminal discharge current: 5kA

Maximum continuous operating voltage (MCOV): 10.2kv  

1/4µs steep current residual voltage:  42.2kv

8/20µs lightning current residual voltage :  36kv

30/60µs switching current residual voltage:  27.0kv

2000µs rectangular wave current impulse: 150A

4/10µs high current withstand discharge capacity : 65KA

Discharge classic: 1

Creepage distance: 360mm

Operating temperature: -40°C to +85°C


Key Features & Construction

Insulation System

Multi-disc silicone housing: The light grey, ribbed porcelain insulator provides mechanical strength and arc resistance. The 360mm creepage path (achieved through optimized shed design) minimizes surface leakage currents, critical for coastal or industrial areas.

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Corona rings (grading rings): The flared ribs at the base equalize electric field distribution, suppressing corona discharge and partial discharges at rated voltage.


Surge Protection Core

Metal Oxide Varistor (MOV) stack: Zinc oxide (ZnO) discs inside the housing offer nonlinear resistance, clamping overvoltages to safe levels (e.g., <35kV for 10kA impulse).

Hermetic sealing: epoxy-sealed construction prevents moisture ingress, ensuring long-term stability.


Termination & Grounding

Top terminal: Bolt-and-nut connection (visible in image) for secure line conductor attachment, compatible with busbars or overhead lines.

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Braided copper ground strap: Low-impedance path (typically ≤10Ω) for surge current dissipation, solder-bonded to the arrester base for durability.

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Mechanical Robustness

Pedestal base: Reinforced polymer/ceramic support withstands wind loads and seismic forces (tested per IEC 61463).

Anti-fracture design: Porcelain housing includes fracture-safe features to prevent shattering during faults.


Typical Applications

Substations: Protects transformers, circuit breakers, and switchgear from lightning/switching surges.

Industrial plants: Safeguards sensitive equipment in mining, oil/gas, or manufacturing facilities.

Renewable energy: Used in solar/wind farm collector systems.


Compliance & Testing

Standards: IEC 60099-4, IEEE C62.11, ANSI C62.1

Tests:

Power frequency withstand: 30kV/1min (dry)

Impulse withstand: 75kV (1.2/50μs)

Leakage current: <1mA at Uc


Advantages Over Competitors

360mm creepage: Superior pollution performance (Class IV per IEC 60815).

Visible grounding: Braided strap allows easy inspection (vs. hidden connections).

Modular design: Facilitates replacement without disassembling adjacent equipment.

For installation, ensure vertical mounting (as shown) with a clear air gap to grounded structures. Periodic infrared inspection of terminals and leakage current monitoring are recommended.


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Address: Nanzhai Village, Liushi Town, Yueqing City, Zhejiang Province,China

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