12KV Distribution Surge Arrester

SARAH Electric's durable 12KV distribution surge arrester supports bulk orders and customized parameters (such as special voltage levels and structural customization). We also support export orders and can provide CE, ISO and other certification documents to meet international logistics shipping needs. The distribution surge arrester covers a full range of voltage levels including 3kV, 6kV, 9kV, 12kV, 15kV, 18kV, 21kV, 24kV, 27kV, 30kV, 33kV, and 36kV.

It is divided into two main current levels: 5kA (YH5W series) and 10kA (YH10W series), which can accurately match the lightning protection needs of different scenarios. It is widely used in distribution networks, substations, industrial infrastructure, outdoor power distribution, and other scenarios, providing all-weather overvoltage protection for core equipment such as transformers, switchgear, cables, and ring main units.

Product parameters

Core advantages

A 12kV distribution surge arrester has 5kA/10kA dual current specification, meeting the full scenario protection requirements from low-voltage distribution to medium voltage transmission

Excellent residual voltage characteristics and current carrying capacity can effectively resist lightning overvoltage and operational overvoltage, avoiding equipment breakdown and burnout

Silicone rubber composite jacket is anti-aging, anti pollution, high and low temperature resistant, and has a service life of more than 20 years in outdoor environment, without regular maintenance after installation

No freewheeling design, no tripping or explosion after action, no impact on normal power supply of the system, ensuring continuous and stable distribution network

The entire series of conventional models are readily available in stock, and batch orders can be produced and shipped within 72 hours, supporting customized parameters and structural requirements

Core functions and technical principles of the product

Core working principle

The 12KV Distribution Surge Arrester uses zinc oxide (ZnO) resistors as the core protective element and utilizes their nonlinear volt ampere characteristics to achieve intelligent protection:

Under normal operating voltage: The resistor is in a high resistance insulation state, with no current passing through, which does not affect the normal power supply of the system

When lightning strikes/overvoltage operations occur: the resistor instantly changes to a low resistance conducting state, clamps the overvoltage within a safe range, and quickly guides the lightning current into the ground

Four core functions

1. Accurately clamp overvoltage, control dangerous voltage within the insulation tolerance range of the equipment, and avoid insulation breakdown

2. After the overvoltage is eliminated, the insulation will be automatically restored without interrupting the system power supply, ensuring the continuity of power distribution

3. No continuous flow, no explosion, no combustion, no need to replace after operation, reducing operation and maintenance costs and safety risks

Product Structure

12KV Distribution Surge Arrester adopts an integrated compression molding structure, and its core components include:

Top terminal: stainless steel bolt+sealed structure, used to connect high-voltage lines and ensure electrical connection reliability

Silicone rubber composite umbrella skirt: designed with a large climbing distance to enhance insulation performance and anti pollution ability, suitable for harsh outdoor environments

Zinc oxide resistor core: a high-quality resistor with high nonlinearity, which is the core component of overvoltage protection

Installation bracket: High strength insulation bracket with fixed holes, suitable for various installation scenarios such as column mounted and switchgear

Bottom grounding terminal: stainless steel wiring terminal, used for safe grounding and ensuring smooth discharge of lightning current

Sealing structure: Integrated vulcanization sealing, no air leakage, no water leakage, moisture-proof and anti condensation, suitable for harsh environments such as high humidity and coastal areas

Installation and usage precautions

1. Before installing the 12 KV distribution surge arrester, the appearance of the product must be checked to ensure that there is no damage, no cracks, and the seal is intact before installation

2. Strictly follow the wiring requirements, connect the high-voltage line at the top and ensure reliable grounding at the bottom. The grounding resistance must comply with the specifications of the distribution system

3. Avoid severe collisions during installation to prevent damage to the silicone rubber jacket and its impact on insulation performance

4. The lightning arrester can be installed horizontally and vertically, suitable for various installation scenarios, and does not require special maintenance

5. Regularly inspect the appearance, and if there are any damage or discharge marks on the jacket, it should be replaced in a timely manner

FAQ

What is the difference between the 5 kA and 10 kA series?

The core difference lies in the rated current capacity: the 10kA series has a high current tolerance and higher long-term withstand current, while the switchgear lightning arrester is suitable for scenarios with higher protection requirements such as thunderstorm prone areas and important loads; The 5kA series is suitable for ordinary power distribution scenarios and offers higher cost-effectiveness.

Do lightning arresters need regular maintenance?

This product is designed for maintenance free use. After installation, only regular inspections of the appearance are required, with no damage or discharge marks, and it can be used normally without the need for regular disassembly and testing, greatly reducing operation and maintenance costs.