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NPC ELECTRIC Transformers Products

High Voltage Power Cable

Master ultra-long distance power transmission with NPC High Voltage Power Cables. Designed for unparalleled performance in demanding applications like grid interconnections and large-scale power plants, these cables utilize advanced XLPE or GIL (Gas-Insulated Line) technology and premium conductors. Our HV cables (typically 66 kV to 500 kV and beyond) offer supreme dielectric strength, exceptional thermal management, and robust resistance to electrical stress and environmental factors. Engineered for minimal loss and maximum stability, they ensure reliable and efficient bulk power delivery across vast distances. Choose our HV cables for secure, long-term critical infrastructure projects.
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In-Depth Analysis

NPC Electric power cables 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 wires and cables 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 power 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 power cable trusted by industries worldwide.
Power Cables Manufacturer

HV Power Cable Reliability

Our high-voltage power cables are engineered for supreme reliability, essential for critical power transmission over vast distances and in harsh conditions. Utilizing cutting-edge XLPE insulation and, where applicable, Gas-Insulated Line (GIL) technology, these HV cables (from 66 kV to 500 kV and beyond) offer unmatched dielectric strength and exceptional thermal management. Every cable undergoes stringent partial discharge and withstand tests, ensuring stable, uninterrupted bulk power delivery. We provide robust HV cable solutions that guarantee long-term operational integrity for grid interconnections, power plants, and national transmission networks, minimizing risks and maximizing uptime.
High, Medium, and Low Voltage Power Cables

Engineered for Peak Performance

We lead the industry with advanced engineering for high-voltage power cables, ensuring unparalleled electrical performance and efficiency. Our designs target minimal energy loss and superior current-carrying capacity, crucial for transmitting immense power loads. These HV cables are meticulously constructed to manage extreme voltage levels and transient phenomena, maintaining system stability across complex power grids. This dedication to precision engineering results in significant operational cost savings and enhanced efficiency for large-scale power infrastructure projects, including ultra-long distance transmission lines and renewable energy integration, providing a secure backbone for modern energy demands.
Power Cable Design

Guaranteed Safety & Compliance

Safety is paramount in high-voltage cable systems. Our HV power cables are manufactured under the strictest quality controls, rigorously adhering to all global safety standards (e.g., IEC, IEEE, CENELEC) and best practices for power transmission. We integrate advanced safety features, including superior fire resistance, robust mechanical protection, and stringent insulation integrity, to ensure maximum operational security. Our commitment extends to environmental responsibility, often utilizing low-smoke, non-toxic materials to mitigate risks. Choosing our HV electrical cable solutions guarantees not only peak performance but also unwavering compliance with critical safety protocols, safeguarding personnel and assets in national grids and heavy industry.
Testing & Quality Control

Expert & Custom HV Solutions

Beyond manufacturing, we offer an unmatched partnership, providing comprehensive expert support for all your high-voltage cable requirements. Our highly specialized technical team possesses deep expertise in HV electrical systems and delivers tailored guidance for the most complex project challenges. From assisting with cable route planning and technical specifications to offering insights on installation, jointing, and maintenance for ultra-high voltage lines, we are your dedicated, trusted advisor. Whether you need bespoke 66 kV to 500 kV+ cables or specialized designs for underground/submarine applications, our goal is to deliver optimal, custom HV solutions that ensure seamless execution and long-term success for your critical power infrastructure.

Product Show

Explore the detailed design and practical application scenarios of power cables
Power Cable

Power Cable Design

power cable core design

Low Voltage Power Cable

Low Voltage Power Cable

lv power cable design

High Voltage Power Cable

High Voltage Power Cable

hv power cable design

Three Cores Power Cable

Three Cores Power Cable

three cores power cable design

Medium Voltage Power Cable

Medium Voltage Power Cable

mv power cable design

SWA HV Power Cable

SWA HV Power Cable

swa high voltage power cable

Single Core Power Cable

Single Core Power Cable

single core power cable design

Four Cores MV Power Cable

Five Cores MV Power Cable

five cores mv power cable 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 power 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 high voltage power cable?

A high voltage power cable is an electrical cable designed to carry electricity at voltages greater than 35kV, typically used for long-distance transmission of electricity from power stations to substations or between substations. These cables are built to handle high electrical loads, reduce energy loss, and ensure safe, efficient power delivery over long distances. They are commonly used in transmission lines and power distribution systems.

Where are high voltage power cables typically used?

High voltage power cables are used in electricity transmission networks, connecting power plants to substations and distribution systems. These cables are essential for long-distance power transmission, where low energy loss and high efficiency are critical. High voltage cables are also used in industrial applications, offshore platforms, and renewable energy projects, ensuring stable electricity supply over large areas or remote locations.

What materials are used in high voltage power cables?

High voltage power cables typically consist of copper or aluminum conductors for excellent electrical conductivity. The insulation material is usually made from cross-linked polyethylene (XLPE) or paper-oil insulation, which provides high dielectric strength and thermal stability. The outer sheath is made from polyethylene (PE) or PVC, offering mechanical protection and resistance to weathering, abrasion, and chemical exposure.

How do high voltage power cables prevent electrical faults?

High voltage power cables are designed with robust insulation and sheath layers to prevent electrical faults such as short circuits, ground faults, and overvoltage conditions. The cross-linked polyethylene (XLPE) insulation offers high resistance to electrical stress, while the outer sheath provides physical protection. Additionally, these cables are equipped with earth conductors and drain wires to provide safe grounding and minimize risks during operation, ensuring the safety and reliability of the power transmission system.

What are the advantages of using high voltage power cables in power transmission?

High voltage power cables offer several advantages in power transmission systems:
1. Efficiency: They reduce energy loss during long-distance power transmission, making them ideal for high-voltage transmission lines.
2. Safety: Designed with multiple layers of insulation and protection, they ensure safe operation, even in harsh environments.
3. Durability: High voltage cables are built to withstand extreme temperatures, mechanical stress, and environmental factors such as moisture, UV radiation, and chemical exposure.
4. Reliability: These cables ensure consistent power delivery across large distances, maintaining the stability of the electricity grid.

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