20KV Dry Type Transformer
Your Leading 20KV Dry Type Transformer Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Specifications of 20KV Dry Type Transformer
|
Parameter |
Specification |
|
Product Type |
20kV Dry Type Transformer |
|
Rated Voltage (HV) |
15kV – 22kV |
|
Rated Voltage (LV) |
0.4kV / 0.42kV / 0.69kV |
|
Rated Capacity |
50 kVA – 5000 kVA |
|
Phase |
Three-phase |
|
Frequency |
50 Hz / 60 Hz |
|
Cooling Method |
AN (Air Natural) / AF (Air Forced) |
|
Insulation System |
Class F / Class H |
|
Winding Material |
Copper / Aluminum |
|
Vector Group |
Dyn11 / Yyn0 / Custom |
|
Tapping Range |
±2×2.5% or ±5% |
|
Impedance Voltage |
4% – 8% |
|
Temperature Rise |
≤100K |
|
Protection Level |
IP00 / IP20 / IP23 / IP54 |
|
Partial Discharge Level |
≤10 pC |
|
Installation Type |
Indoor / Outdoor |
|
Standards |
IEC 60076 / IEC 60076-11 / IEEE / ANSI |
|
Altitude |
≤1000 m |
|
Ambient Temperature |
≤40°C |
Enhanced Safety: With no flammable liquids, the risk of fire and explosion is virtually eliminated. This is the single most important benefit for indoor and public-access applications.
Low Maintenance: No need for oil sampling, filtering, or leak repairs. Maintenance is typically limited to visual inspection and cleaning.
Environmental Friendliness: No risk of oil spills contaminating soil or groundwater, making them a green solution.
Installation Flexibility: Can be installed closer to the load, reducing cabling costs and power losses. They are perfect for high-rises, data centers, hospitals, and commercial buildings.
High Reliability: Modern cast resin designs are highly resistant to short-circuits, moisture, and harsh industrial atmospheres.
Components of 20KV Dry Type Transformer
Core
Core is the backbone of any transformer, including dry type transformers. It is usually made of laminated silicon steel sheets to minimize eddy current losses.
Dry-type transformer core is responsible for conducting magnetic flux between primary and secondary windings. Cores are designed either as "core-type", which is wrapped around windings, or "shell-type", which is windings wrapped around the core.
Windings
Windings are coiled conductors that help carry current and create the necessary electromagnetic induction. The primary winding of a dry-type transformer is connected to the input voltage source, while the secondary winding provides the transformed output voltage.
Insulation Systems
Insulation is one of the most important parts for any type of transformer, including dry-type transformers, to prevent failures and ensure longevity.
Cooling System
Cooling systems in dry-type transformers typically rely on air circulation or various advanced materials to dissipate heat.
Natural Air Cooling (AN) systems use vents and fins for passive cooling in low-power units for smaller applications. Forced Air Cooling (AF) adds fans to increase airflow for higher voltage loads.
Enclosure
Enclosure is the outer part of dry-type transformers that protects the internal components from environmental damage. It is usually made of steel, aluminum, or stainless steel with corrosion-resistant coatings.
Bushing and Terminals
Bushings and terminals are the parts that connect your transformer to external circuits. Bushings are the insulated connectors that safely carry current through the enclosure. Terminals provide secure points for cable connections.
Tap Changers
Tap changers are used to adjust the transformer turns ratio to maintain the desired stable output voltage. Off-load tap changers require the transformer to be de-energized to adjust the taps, while on-load tap changers can be used during operation without interrupting voltage control.
Monitoring and Protection Devices
High-end, modern dry-type transformers typically include integrated safety and performance systems such as temperature sensors, humidity sensors, or surge arresters. These devices allow operators to track temperature fluctuations, moisture intrusion into the enclosure, and protect against voltage spikes from lightning or switching.
Accessories
Dry-type transformers may have other accessories and optional components such as wheels, silencers, or IoT-enabled sensors for remote monitoring and real-time diagnostics. You can customize your dry-type transformer to meet your needs.
Dry type transformers find utility in diverse sectors due to their safety, reliability, and minimal environmental impact.
Commercial and Residential Buildings
• Power distribution in high-rise buildings and complexes.
• Ensures uninterrupted power with high safety.
Industrial Plants
• Reliable power in hazardous environments like chemical factories.
• Reduces downtime and enhances operational efficiency.
Renewable Energy Projects
• Wind and solar farms rely on these transformers for safe energy transmission.
• Withstands varying environmental conditions.
Comparative Analysis of Dry-Type Transformers and Oil-Immersed Transformers
|
Feature |
Dry Type |
Oil-Filled |
|
Cooling Medium |
Air or resin |
Oil |
|
Fire Risk |
Low |
Higher |
|
Maintenance |
Minimal |
Regular oil checks needed |
|
Environmental Impact |
Eco-friendly |
Potential oil spill risks |
|
Installation Cost |
Higher initial cost |
Lower initial cost |
|
Noise Level |
Lower |
Higher |
Customization Options
Material: Customizable
Structure: Customizable
MOQ: Customizable
Manufacturing Process of Power Transformer
Core Lamination Process
The transformer core is manufactured using high-grade CRGO silicon steel to minimize core loss and improve efficiency.
01
Winding Process (Copper / Aluminum)
Windings are produced using high-conductivity copper or aluminum, depending on project requirements.
02
Vacuum Drying & Oil Filling
This process ensures optimal insulation performance and long-term reliability.
03
Testing & Quality Control
Each transformer undergoes strict testing procedures in accordance with international standards.
04
Final Assembly & Packaging
Final assembly ensures mechanical integrity and readiness for transportation and installation.
05
Payment Terms
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading 20kv dry type transformer manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality 20kv dry type transformer made in China here from our factory. Contact us for more details.
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