x
NPC ELECTRIC Transformers Products

Wires and Cables

Tree Cable

Tree cable, often referred to as XLPE-HDPE tree cable, is a specially designed medium-voltage power cable that combines cross-linked polyethylene (XLPE) insulation with a high-density polyethylene (HDPE) jacket. The term “tree cable” comes from its ability to resist electrical treeing—a degradation process in insulation that can lead to breakdown over time. By using advanced insulation materials and protective layers, tree cables provide excellent durability, moisture resistance, and long-term reliability in distribution networks. They are widely applied in 25kV overhead and underground systems, offering utilities a safe and efficient solution for power transmission.
 1

In-Depth Analysis

Tree 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)

icon-core

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%
icon-core

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
icon-core

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
icon-core

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%
icon-core

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%
icon-core

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 Tree Cable have been rigorously tested and can operate stably under various harsh environmental conditions.

icon-temperature

Temperature Range

-40℃ ~ +55℃

Can work normally in extreme high and low temperature environments

icon-water

Humidity Adaptation

0 ~ 100% RH

Including condensation environment, no frost requirement

icon-kangzhen

Weather Resistance Grade

UV/IEC 60811-501

The outer sheath has excellent UV resistance and aging resistance

icon-haiba

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 tree cables trusted by industries worldwide.
Overhead Insulated Cable Manufacturer

Protection Against Vegetation Faults

NPC Electric Tree Cables are specifically engineered to provide unmatched protection for overhead power lines in areas prone to tree contact, a leading cause of power outages. Featuring an extra-thick, highly abrasion-resistant outer jacket (typically HDPE or XLPE), these covered conductors form a robust barrier against the constant friction and impact from tree branches. This superior design dramatically reduces the risk of insulation degradation, short circuits, and subsequent service interruptions. By deploying our tree wire solutions, utilities can significantly enhance grid reliability and minimize fault-related damages, ensuring consistent power delivery even in heavily treed environments.
Overhead Insulated Cable Benefits

Enhanced Public & Wildlife Safety

NPC Electric Tree Cables play a crucial role in enhancing both public and wildlife safety in vegetated areas. The robust insulation and thick outer jacket of these covered conductors significantly reduce the risk of accidental electrical contact, protecting humans who might inadvertently interact with fallen lines or tree trimmers working near them. Furthermore, the insulation provides a vital safeguard for wildlife, preventing electrocution that often occurs with bare overhead wires. By investing in our safe tree wire, utilities demonstrate a commitment to community and environmental welfare, building a safer and more responsible power distribution network for all.
Overhead Insulated Cable Installation

Reduced Maintenance & Operational Costs

Deploying our Tree Cables leads to substantial reductions in both maintenance and operational costs for utility companies. With their superior abrasion resistance, these covered conductors allow for greater tolerance to tree growth, significantly extending the intervals between costly tree trimming cycles. Less frequent vegetation management translates directly into lower labor costs and fewer operational disruptions. Moreover, by preventing tree-related faults and outages, our tree wire solutions minimize emergency repair expenses and reduce financial penalties associated with service interruptions, contributing to a more efficient and economically sustainable overhead power line system.
Testing and Certification

Long-Term Durability & Weather Resilience

Tree Cables are built for exceptional long-term durability and resilience against harsh weather conditions, ensuring reliable performance year after year. The advanced HDPE or XLPE insulation materials are specifically formulated to withstand prolonged exposure to UV radiation, extreme temperatures, moisture, and environmental pollutants without degrading. This robust construction ensures that the integrity of the power line is maintained, even in regions experiencing severe weather events like heavy winds, ice storms, or intense sunlight. Trust our durable covered conductors to provide a resilient and consistent power supply in the most challenging of vegetated environments.

Product Show

Explore the detailed design and practical application scenarios of tree 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 tree cable made of?

A tree cable is composed of three main layers: the power cable conductor, an insulation layer, and a sheath protective layer. The power cable conductor is made of one or more aluminum-containing conductors that are stranded together. The insulation layer is extruded onto the conductor and is made of irradiated cross-linked polyethylene to ensure electrical insulation. The sheath protective layer is applied to the insulation and is made from high molecular weight polyethylene, providing protection against weathering and tracking resistance.

What is the purpose of the insulation layer in a tree cable?

The insulation layer in a tree cable is designed to provide electrical insulation to prevent electrical leakage and ensure the safety of the power transmission. It is made of irradiated cross-linked polyethylene, which offers excellent thermal stability, electrical strength, and durability. This insulation prevents contact between the conductive core and the environment, reducing the risk of electrical faults and ensuring safe operation in various weather conditions.

Why is the sheath protective layer important in a tree cable?

The sheath protective layer in a tree cable provides an additional layer of protection to ensure the cable’s mechanical integrity and weather resistance. Made of high molecular weight polyethylene, this layer helps protect the cable from abrasion, UV radiation, and environmental stresses such as moisture and extreme temperatures. It also provides tracking resistance, ensuring the cable remains functional and safe for long-term outdoor use in tree cabling applications.

What materials are used in the power cable conductor of a tree cable?

The power cable conductor in a tree cable is made of one or more aluminum-containing conductors that are stranded together. This choice of material ensures excellent electrical conductivity while keeping the cable lightweight and cost-effective. The use of aluminum also helps improve the cable's corrosion resistance, making it ideal for outdoor installations in environments where moisture and temperature fluctuations are common.

How does the construction of a tree cable benefit its performance?

The construction of a tree cable, with its layered design of power cable conductor, insulation layer, and sheath protective layer, provides several key benefits. The aluminum conductor ensures efficient electrical power transmission, while the insulation layer prevents electrical faults by providing excellent insulation. The sheath protective layer adds durability by making the cable resistant to weathering, abrasion, and tracking, ensuring long-lasting performance and minimal maintenance, even in challenging outdoor environments.

Welcome your inquiry

Honesty, Integrity, Frugality, Activeness and Passion