12KV Polymer Fuse Cutout

SARAH Electric advanced 12KV Polymer Fuse Cutout covers the full range of specifications D30, D32, D35, D38, D40, D42, D48, D53, D60, D70, and is suitable for the production needs of lightning arresters in 3kV distribution systems. It can meet the manufacturing requirements of lightning arresters with different current levels of 5kA, 10kA, and 20kA, and is widely used in lightning arrester production, power equipment matching, surge protection device research and development, and other scenarios.

Core advantages

Diameter 30mm-70mm full-size series, flow rating 5kA-20kA full coverage, suitable for customized needs of various lightning arresters.

Low residual voltage, high current, stable MCOV (maximum continuous operating voltage) to ensure the protection performance of lightning arresters.

Strict production control and full batch testing, high consistency of resistor parameters, and no performance deviation in batch production.

Anti aging, anti thermal shock, anti electric corrosion, service life over 20 years, suitable for outdoor harsh environment.

Regular specifications of the entire series are readily available in stock, and batch orders can be produced and shipped within 72 hours, supporting customized parameters.

Core principles and functions of the product

Working principle

The core characteristic of 12KV Polymer Fuse Cutout is nonlinear volt ampere characteristics:

Under normal operating voltage, the resistor is in a high resistance insulation state, with minimal leakage current, which does not affect the normal operation of the circuit.

When lightning strikes/overvoltage occur, the resistor instantly becomes low resistance conductive, clamping the overvoltage within a safe range and quickly releasing surge current.

After the overvoltage disappears, it automatically restores the high resistance insulation state without any continuous current, which does not affect the normal power supply of the system.

Product Structure

The 12KV Polymer Fuse Cutout has a standard round cake structure, with the core components being:

Zinc oxide ceramic core, high-purity ZnO formula, is the core for achieving nonlinear volt ampere characteristics.

Double sided metal electrodes ensure electrical connection reliability and enhance current carrying capacity.

Side insulation glaze layer to prevent surface flashover, improve insulation performance and anti pollution ability.

Surface laser engraving parameter identification, convenient for selection and traceability.

Core Materials and Technological Advantages

12KV Polymer Fuse Cutout uses 99.9% high-purity ZnO raw material, with the addition of special additives to enhance nonlinearity and flow capacity.

High temperature and high pressure sintering results in high density, uniform grain size, stable performance, and low aging rate.

High insulation and weather resistant glaze layer, resistant to electrical corrosion and moisture, suitable for harsh outdoor environments.

Precision machining process: dimensional tolerance controlled within ± 0.2mm, high consistency, suitable for automated lightning arrester assembly.

Application

12KV Polymer Fuse Cutout, as the core component of composite jacket lightning arresters and porcelain jacket lightning arresters, is used in the production of 3-36kV distribution and power station lightning arresters, and is the core guarantee of lightning arrester performance.

It is used as a surge protection module for power equipment such as transformers, switchgear, ring main units, and cable terminals, providing overvoltage protection for distribution systems.

Surge protection for grid connected cabinets, inverters, box transformers, and other equipment in photovoltaic, wind power, and energy storage systems to resist lightning strikes and operational overvoltages.

Surge protection devices for industrial control, power equipment, and communication equipment to protect against surge impacts caused by lightning strikes and switch operations.

Selection guide and usage instructions

1. Selection Guide

1. Current level matching: Select the corresponding specifications based on the rated discharge current of the lightning arrester. For 5kA lightning arrester, choose D30/D32/D35; for 10kA, choose D38/D40/D42/D48/D53; and for 20kA, choose D60/D70.

2. Size adaptation: Select the corresponding diameter of the varistor according to the structural design of the export varistor, and adapt to high current and high energy scenarios for larger diameters.

3. Voltage matching: 12KV Polymer Fuse Cutout is compatible with 3kV level systems, and higher voltage levels can be achieved by connecting resistors in series.

2. Precautions for use and processing

1. The storage environment should be dry, ventilated, and avoid moisture and high temperatures to prevent the resistor from being affected by moisture and affecting its performance.

2. Avoid severe collisions and drops during assembly to prevent cracking of the ceramic core.

3. Control temperature during welding/assembly to avoid high temperature damage to resistor performance.

4. When used in series, resistors with consistent parameters should be selected to ensure balanced performance.

5.All batches of resistors have undergone factory testing and testing reports can be provided.

Shipment and Service Guarantee

1. Spot and Delivery Capability

We have a large stock of regular specifications (D30-D70) in stock, and will arrange for shipment within 24 hours after placing an order.

Batch orders and customized parameters (such as special sizes and voltage levels) can be produced within 72 hours, and urgent orders are supported.

Zinc oxide valve plates support export orders and can provide CE, ISO and other certification documents to meet international logistics shipping needs.

12KV Polymer Fuse Cutout supports small batch samples for customer testing and verification, with sample orders shipped within 48 hours.

2. Quality and after-sales guarantee

The ZnO varistors are strictly produced in accordance with the national standard GB/T 11032 "AC gapless metal oxide surge arresters", and 100% tested throughout the entire batch to ensure that the performance meets the standards.

Provide a 12-month product warranty, with free returns and exchanges for non-human damage during the warranty period.

Our professional technical team provides selection guidance and application solution design, and responds to customer needs 24/7.

We can provide customized formulas, sizes, and parameter services to meet the needs of special scenarios.