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NPC ELECTRIC Transformers Products

In-Depth Analysis

Substation transformers 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.

Comparative Analysis of Efficiency and Loss

Compared to the industry average, transformers exhibit lower losses and higher efficiency across the entire load range.

Load Efficiency Comparison(%)

No-load Loss Comparison(W)

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High-efficiency Core Design

High magnetic permeability and low loss silicon steel sheets are used and processed by special process to reduce hysteresis loss and eddy current loss and improve conversion efficiency.

Improved Magnetic Permeability
+30%
Reduced Iron Loss
-35%
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Multiple Protection Systems

IP65 protection grade design combines multiple protection measures such as anti-corrosion, anti-UV, anti-condensation and anti-small animal intrusion.

Waterproof Performance
IP65
Anti-Corrosion Ability
15 years+
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Ultra-low Noise Technology

A special shock-absorbing structure, low-noise fans, and optimized heat dissipation design ensure operating noise is far below industry standards.

Noise Reduction
-15dB
Suitability for Residential Areas
Excellent
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Intelligent Cooling System

The heat dissipation system with adaptive temperature control automatically adjusts the heat dissipation efficiency according to the load and ambient temperature to reduce energy consumption.

Heat Dissipation Efficiency
+40%
Temperature Stability
±2℃
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Safety Wiring System

Insulated protective cover and anti-misoperation design ensure personnel safety during installation and maintenance and reduce accident risks

Insulation Grade
Class H
Safety Protection
IP2X
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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
96%

Environmental Adaptability Analysis

Substation Transformers 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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Seismic Resistance Level

IEC 60068-2-57

Suitable for earthquake-prone areas

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Altitude

≤3000m

More than special design

Why Choose Us

Discover why our Substation transformers are trusted worldwide for efficiency, safety, and reliability.
Types Of Transformer Substation

Types Of Transformer Substation

There are several types of transformer substation used in modern power systems, each serving a specific function in voltage conversion and energy distribution. The most common are distribution substations, which supply power to residential and commercial areas, and power substations, which manage high-voltage transmission.
Step-up substations increase voltage for long-distance transmission, while step-down substations reduce voltage for end users. Each substation transformer, often designed as an oil immersed transformer, ensures safe, efficient, and stable power delivery across industrial, utility, and grid applications.
NPC Substation Transformers Manufacturer

Substation Transformers Manufacturer

As a trusted substation transformer manufacturer, NPC Electric provides high-quality transformer solutions designed for reliable power distribution and grid integration. Our substation transformers are engineered for superior performance, efficiency, and safety — ideal for power plants, substations, and large-scale industrial facilities.
We manufacture a wide range of power transformers and distribution transformers, including oil-immersed substation transformers built to meet IEC, IEEE, and ANSI standards. With advanced production technology, strict quality testing, and customized voltage configurations, NPC Electric ensures stable operation, minimal energy loss, and long service life. As a professional substation transformer manufacturer, we are committed to delivering dependable products and technical support to customers worldwide.
NPC Distribution Transformer Installation

Substation Transformer Design

Modern substation transformer design focuses on safety, efficiency, and long-term reliability to ensure stable power distribution. Each substation transformer is engineered with a durable core, high-quality windings, and an oil immersed cooling system for optimal heat dissipation. The design varies depending on capacity, voltage level, and environmental conditions.
Whether used as a power transformer for transmission networks or a distribution transformer for local grids, advanced insulation, and protection systems guarantee performance and low energy loss. A well-designed three phase substation transformer delivers maximum efficiency and consistent operation even under heavy load conditions.
NPC Strict Transformer Testing & Quality Control

Strict Transformer Testing & Quality Control

At NPC Electric, we implement strict transformer testing and quality control throughout every stage of production to ensure the highest level of performance and reliability. Each distribution transformer, including oil-immersed transformers and substation transformers, undergoes rigorous electrical, mechanical, and insulation tests before delivery.
Our testing process follows international standards such as IEC, IEEE, and ANSI, covering parameters like load loss, temperature rise, insulation resistance, and oil quality. Every unit is inspected using advanced equipment and can be verified by third-party agencies like SGS or BV. With our strict transformer quality control, customers receive products that guarantee efficiency, safety, and long-term durability in any environment.

Product Show

Explore the detailed design and practical application scenarios of distribution transformers
220kV Substation Transformer Production Completed

220kV Substation Transformer

220kV Transformer Production Completed

Substation Transformer Parts

Substation Transformer Parts

transformer parts including temperature and humidity meter

Substation transformer HV Bushing  LV Bushing

HV Bushing LV Bushing

transformer HV Bushing LV Bushing

Substation Transformer HV Bushing

Substation Transformer HV Bushing

three transformer hv bushing

500kV Substation Transformer Oil Conservator

Substation Transformer Oil Conservator

transformer oil conservator

Substation Transformer Top Structure

Substation Transformer Top Structure

substation transformer top structure

Electrical Substation Transformer

Electrical Substation Transformer

transformer design (front view)

750kVA Substation Transformer

750kVA Substation Transformer

750kva transformer font view

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

Substation transformers have been successfully applied in many projects and have been highly praised by customers.
Mexico  Smart Factory For 220kVA Substation Transformer

Project Cases

Completed

Provide stable and reliable power conversion solutions for the smart factory to meet diverse production needs.

Country:Mexico

Model:220kVA Substation Transformer x 2

"Simple and firm installation, stable operation"
13.8kV - 0.48Y/0.22kV, 3MVA Substation Transformer

Guyana Power & Light Inc

Completed

Ensure the power safety of surrounding residents and meet daily work needs

Country:Guyana

Model:13.8kV - 0.48Y/0.22kV, 3MVA Substation Transformer x 5

"High efficiency, easy installation, and dependable operation."
750VA Substation Transformer for surinam

Surinam Factory

Completed

NPC transformers provide safe, efficient, and reliable power distribution in Surinam.

Country:Surinam

Model:750VA Substation Transformer x 5

"High efficiency, easy installation, and dependable operation."

Technical Advantages

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

FAQ From Customers

What is a substation transformer?

A substation transformer is a critical component in an electrical substation that steps voltage up or down between transmission and distribution systems. It allows efficient power transfer from high-voltage transmission lines to lower-voltage distribution transformers used in residential, commercial, and industrial applications. Most substation transformers are designed as oil immersed transformers for better cooling and insulation performance.

How many transformers are in a substation?

The number of transformers in a substation depends on its size, capacity, and network design. A small distribution substation may have one or two substation transformers, while large power substations can include multiple units operating in parallel to handle higher load demands. Redundancy is often built in to ensure reliable power supply during maintenance or peak demand.

What are the four types of transformers?

The four main types of transformers used in power systems are:
1. Power transformers – for high-voltage transmission networks.
2. Distribution transformers – for local energy distribution.
3. Instrument transformers – for measurement and protection.
4. Isolation transformers – for safety and equipment protection.
Among these, oil immersed transformers are the most common type used in substation transformer design due to their high efficiency and durability.

Why do we need a substation transformer?

A substation transformer is essential for voltage regulation and safe power transmission. It converts high-voltage electricity from transmission lines to lower levels that can be distributed through distribution transformers to consumers. Without substation transformers, energy losses during long-distance transmission would increase dramatically, reducing overall grid efficiency and reliability.

What is inside a substation transformer?

Inside a substation transformer, you’ll find a magnetic core, primary and secondary windings, insulating oil, bushings, and a cooling system. The oil immersed design helps regulate temperature and prevent electrical faults by providing insulation and heat dissipation. This internal structure ensures safe, stable, and efficient performance under high-voltage operating conditions in modern electrical substations.

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