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NPC ELECTRIC Transformers Products

In-Depth Analysis

Overhead Insulated Cable are built to deliver high efficiency, reliable performance, and advanced safety, helping businesses reduce energy costs while ensuring stable power supply. With future-ready adaptability for renewable energy and smart grid applications, they provide a sustainable and innovative solution for today’s and tomorrow’s power needs.

Comparative Analysis of Efficiency and Loss

Compared to the industry average, NPC Overhead Insulated Cable exhibit lower losses and higher efficiency across the entire load range.

Load Efficiency Comparison(%)

No-load Loss Comparison(W)

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High Conductivity Design

High-purity oxygen-free copper or high-quality aluminum conductors are used with smooth surface and low resistance to ensure efficient power transmission and reduce energy loss.

Improved Conductivity
+20%
Reduced Energy Loss
-15%
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Insulation Protection System

Use flame-retardant, wear-resistant and corrosion-resistant polymer insulation materials to meet the safe operation requirements in different environments.

Withstand Voltage Level
≥1kV
Flame Retardant Grade
VW-1 / IEC 60332-3
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Weather-Resistant & Durable Technology

The outer sheath is made of UV-resistant, heat-resistant, and oil-resistant materials, making it suitable for high and low temperatures, humidity, and long-term outdoor use.

Service Life
≥ 25 Years
Operating Temperature Range
-40°C to +90°C
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Safe Flame Retardant System

The multi-layered flame-retardant structure effectively slows the spread of flames and releases low-smoke, halogen-free gases during combustion, reducing secondary hazards.

Flame Retardant Performance
IEC 60332 / UL 1581 Qualified
Smoke Density
Low Smoke ≤50%
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Easy Installation & Maintenance

The flexible core and flex-resistant outer sheath provide a small bend radius and high installation efficiency. Color coding and length markings reduce installation and maintenance costs.

Bend Radius
≤6D
Installation Efficiency Improvement
+30%
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Intelligent Monitoring

An optional remote monitoring system is available to monitor operating status, temperature, load and other parameters in real time, and supports fault warning and remote diagnosis.

Data Collection Frequency
one times a minute
Fault Warning Accuracy
98%

Environmental Adaptability Analysis

NPC Overhead Insulated Cable have been rigorously tested and can operate stably under various harsh environmental conditions.

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Temperature Range

-40℃ ~ +55℃

Can work normally in extreme high and low temperature environments

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Humidity Adaptation

0 ~ 100% RH

Including condensation environment, no frost requirement

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Weather Resistance Grade

UV/IEC 60811-501

The outer sheath has excellent UV resistance and aging resistance

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Chemical Corrosion Resistance

Oil / Acid / Alkali

Resistant to oil, acid, alkali and some chemical corrosion environments

Why Choose Us

With 30 years of expertise, global certifications, and advanced manufacturing technology, NPC Electric delivers reliable, high-performance overhead insulated cable trusted by industries worldwide.
Overhead Insulated Cable Manufacturer

Overhead Insulated Cable Manufacturer

NPC Electric is a leading overhead insulated cable manufacturer, specializing in the production of high-quality insulated power cables for overhead power lines and electricity distribution systems. Our overhead insulated cables are designed to provide safety, reliability, and long-term performance in outdoor installations, especially in high voltage and high-current applications. These cables offer excellent corrosion resistance and mechanical strength, ensuring minimal maintenance and increased durability. Made from premium materials and manufactured to international standards, NPC Electric’s insulated cables are perfect for urban, rural, and industrial networks. Our commitment to quality and innovation guarantees the reliable energy delivery and sustainable power distribution you need for any infrastructure project.
Overhead Insulated Cable Benefits

Overhead Insulated Cable Benefits

Overhead insulated cables offer several key benefits for power transmission networks. The primary advantage of insulated power cables is their enhanced safety, as they reduce the risk of electrical accidents by providing protection against accidental contact with live wires. These high voltage insulated cables also minimize the impact of environmental factors such as wind, rain, or snow on the transmission network. Corrosion-resistant cables are ideal for coastal areas or regions with high humidity, ensuring longevity and reducing maintenance costs. Additionally, insulated cables improve energy efficiency by minimizing losses and reducing the need for costly repairs. In renewable energy applications, such as solar and wind power systems, overhead insulated cables ensure safe and efficient energy delivery across vast areas.
Overhead Insulated Cable Installation

Overhead Insulated Cable Installation

Overhead insulated cable installation requires careful planning and adherence to safety standards. NPC Electric ensures that our insulated power cables are installed following precise installation procedures, which include proper tensioning, securing to support structures, and maintaining safety clearances in overhead power lines. The high voltage cable installation process is designed to minimize risks and ensure long-term reliability. Once installed, insulated cables require regular maintenance to ensure optimal performance. This includes periodic inspections for damage, corrosion, and insulation wear, as well as testing for voltage endurance and mechanical integrity. NPC Electric’s cable maintenance services guarantee that power transmission networks continue to operate safely, efficiently, and with minimal downtime, ensuring reliable power delivery for urban, rural, and industrial installations.
Testing and Certification

Testing and Certification

At NPC Electric, every overhead insulated cable undergoes rigorous testing and certification to ensure optimal performance and safety. Our insulated power cables are tested for high voltage endurance, insulation resistance, and mechanical strength to meet IEC and ANSI standards. We conduct comprehensive quality control checks, including dielectric testing, temperature rise testing, and corrosion resistance evaluation to guarantee the durability of our high voltage cables in demanding environments. Each insulated cable is certified to meet international safety standards, ensuring reliable performance in overhead power lines, electricity distribution systems, and renewable energy projects. NPC Electric’s commitment to quality testing and certification ensures long-term, safe power transmission and minimal maintenance requirements.

Product Show

Explore the detailed design and practical application scenarios of overhead insulated cables
Overhead Insulated Cable

Overhead Insulated Cable

overhead cable have colors

Overhead Insulated Cable Four Color

Overhead Insulated Cable Color

overhead cable four colors

Aerial Bundled Cable

Aerial Bundled Cable

abc cable design cores

Aerial Bundled Cable Core

Aerial Bundled Cable Core

abc cable font view cores

Service Drop Cable

Service Drop Cable

service drop cable cores design

Control Cables

Control Cables

control cables product show

Control Cables Structure

Control Cables Structure

control cables structure design

Overhead Insulated SWA Cable

Overhead Insulated SWA Cable

swa cable cores design

Testing and Certification

Tested with precision and certified to meet international standards as well as strict industry requirements.
Bare Cable(AAC,AAAC,ACAR ACSR) Test Report

Bare Cable Test Report

SGS Inspection Report

SGS Inspection Report

Certificate of Acceptance

Certificate of Acceptance

ISO Quality Management System Certificate

ISO Quality Certificate

ISO Environmental Certificate

ISO Environmental Certificate

ISO Occupational Certificate

ISO Occupational Certificate

UL Laboratory Certificate

UL Laboratory Certificate

UL Product Certificate

UL Product Certificate

Project Cases

NPC wires and cables have been successfully applied in many projects and have been highly praised by customers.
NPC Electric Delivers Medium-Voltage Cables for Peru Solar PV Project

Peru Solar PV Project

Completed

NPC Electric Delivers Medium-Voltage Cables for Peru Solar PV Project

Country:Peru

Model:HEPRZ1(AS) 1x630 mm² 19/33kV x 6km

"High quality, strong water-discharging and corrosion-resistant ability"
19/33kV MV Power Cables

Chile El Project

Completed

Reliable 19/33kV MV cables ensuring safe, stable, and efficient power transmission for critical projects.

Country:Chile

Model:19/33kV MV Power Cables x 5km

"Safe, stable and strong anti-corrosion ability"
AAAC Conductor Cable & Triplex Cable

Dominican Edenorte Project

Completed

Provide outdoor power solutions for urban main road reconstruction projects to adapt to complex environments.

Country:Dominican

Model:NPC AAAC Cable & Triplex Cable x 10km

"Excellent protection performance, suitable for outdoor environment"

Technical Advantages

● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions

FAQ From Customers

What is a concentric cable?

A concentric cable is an electrical cable consisting of a central conductor, typically made of copper or aluminum, surrounded by one or more layers of insulating material and an outer layer of wire conductors that form the return path for the current. Commonly used in low-voltage power distribution systems, concentric cables are ideal for underground installations, providing both electrical power and protection against short circuits. These cables are designed to withstand mechanical stresses and environmental factors.

What is the difference between 16mm concentric cable and 25mm concentric cable?

The primary difference between the 16mm concentric cable and the 25mm concentric cable is the size of the conductor and their current-carrying capacity. 16mm concentric cable is commonly used for residential and small commercial applications where lower power transmission is required, while 25mm concentric cable is suitable for medium power distribution in larger residential areas or commercial buildings. Both cables offer excellent mechanical protection, but 25mm cables support higher current loads and are better suited for larger electrical systems.

What are the applications of split concentric cable?

Split concentric cables are commonly used for low-voltage power distribution in underground networks. The design of a split concentric cable includes a central conductor, surrounded by an insulating layer, with an outer sheath of concentric conductors that are separated into two parts. This design makes split concentric cables ideal for two-way transmission systems, offering improved electrical performance and safety. Split concentric cables are widely used in utilities, residential power connections, and street lighting systems, providing reliable and secure energy distribution.

What is the advantage of concentric cables over standard cables?

Concentric cables offer several advantages over standard cables, particularly in power distribution systems. The concentric construction provides added mechanical strength and safety by using the outer conductive layer as a neutral conductor, which reduces the risk of electrical faults and short circuits. This type of cable is ideal for underground installations as it minimizes space requirements and improves electrical stability. The use of insulated concentric cables also offers protection against external damage and environmental factors, making them more reliable in urban environments and harsh weather conditions.

What are the specifications of concentric cable 16mm and concentric cable 25mm?

Concentric cable 16mm and concentric cable 25mm have different specifications tailored to their intended applications. The 16mm concentric cable is designed for smaller power loads and is typically used for low-voltage residential and commercial networks, with a smaller conductor size and current-carrying capacity. On the other hand, a 25mm concentric cable is used for higher current applications and offers greater power handling capability, often used in medium power distribution systems. Both cables feature durable insulation, concentric conductor layers, and corrosion-resistant materials, ensuring long-lasting performance.

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