Your Leading 10KV Oil-Immersed 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 10KV Oil-Immersed Transformer
|
Rated capacity |
Rated voltage and tapping range |
Vector group |
No Load Current |
|
No load Losses |
On load Losses |
||
|
HV |
Tapping range |
LV |
||||||
|
200 |
10 |
±4×2.5 |
0.4 |
Dyn11 Yyn0 |
0.8 |
4 |
0.31 |
2.9 |
|
250 |
0.72 |
0.35 |
3.42 |
|||||
|
315 |
0.72 |
0.43 |
4.1 |
|||||
|
400 |
0.64 |
0.51 |
4.95 |
|||||
|
500 |
0.64 |
0.61 |
5.89 |
|||||
|
630 |
0.48 |
4.5 |
0.77 |
7.26 |
||||
|
800 |
0.48 |
0.9 |
8.89 |
|||||
|
1000 |
0.48 |
1.09 |
10.4 |
|||||
|
1250 |
0.4 |
1.25 |
12.3 |
|||||
|
1600 |
0.4 |
1.54 |
14.7 |
|||||
|
2000 |
0.32 |
5 |
1.82 |
18.6 |
||||
|
2500 |
0.32 |
2.14 |
21.6 |
|||||
Advantages of 10KV Oil-Immersed Transformer
Superior Thermal Management for Longevity
The most fundamental advantage of oil-immersed transformers, crucial for operations in high-load and elevated ambient temperature settings, is their superior thermal management system.
Robust Durability and Extended Lifespan
Oil-immersed transformers are engineered for exceptional durability, often achieving an operational lifespan exceeding 30 years when properly managed. This longevity is not accidental; it is a direct result of the design's inherent protection and a stringent maintenance protocol.
Optimized Power Density and Energy Efficiency
Oil-immersed transformers are foundational to efficient power distribution primarily due to two interrelated factors: their high power density and their ability to minimize energy losses even when operating at or near full capacity.
Strategic Advantage in Total Cost of Ownership (TCO)
While the initial capital expenditure for oil-immersed transformers may be higher than certain alternatives, their economic viability becomes evident when analyzing the Total Cost of Ownership (TCO) over a 30-year lifecycle. Choosing these units represents a long-term strategic investment that delivers substantial savings through superior efficiency and minimized maintenance requirements.
Maximized Reliability and Failure Prevention
The final and most critical advantage, particularly for infrastructure deployed in electrically volatile, harsh environments, is the significantly reduced risk of internal failure and short circuits. This enhanced safety is a direct function of the dielectric fluid's properties.
10KV Oil-Immersed Transformer vs. Dry-Type Transformers: A Comparative Summary
|
Feature |
Oil-Filled Transformers |
Dry-Type Transformers |
Key Difference |
|
Cooling Medium |
Mineral/Synthetic Oil |
Air/Natural Convection |
Liquid vs. Air Cooling |
|
Maintenance Needs |
Requires oil testing |
Minimal |
Oil handling vs. dry design |
|
Fire Safety |
Needs containment/fire systems |
Naturally fire-resistant |
Higher fire risk for oil types |
|
Installation Location |
Indoor & Outdoor |
Mostly Indoor |
Flexibility vs. Safety Requirements |
|
Power Capacity |
High (up to grid-scale) |
Lower (typically under 20 MVA) |
Suitable for high-demand use cases |
|
Energy Efficiency |
Slightly higher on average |
Slightly lower |
Oil improves heat dissipation |

Power Generation
Used in generation plants to step up voltage for efficient transmission.
Transmission and Substations
Enable voltage regulation and loss minimization across large power networks.
Industrial Facilities
Provide stable voltage to drive heavy machinery, motors, and process systems.
Renewable Energy Systems
Connect wind or solar farms to main grids, ensuring smooth energy transfer.
Utilities and Distribution
Used by utilities for both primary and secondary voltage distribution in urban and rural networks.
Core Lamination Process
The transformer core is manufactured using high-grade CRGO silicon steel to minimize core loss and improve efficiency.
Winding Process (Copper / Aluminum)
Windings are produced using high-conductivity copper or aluminum, depending on project requirements.
Vacuum Drying & Oil Filling
This process ensures optimal insulation performance and long-term reliability.
Testing & Quality Control
Each transformer undergoes strict testing procedures in accordance with international standards.
Final Assembly & Packaging
Final assembly ensures mechanical integrity and readiness for transportation and installation.

Customization Options
Voltage: Optional
Capacity: Optional
Impedance: Optional
Cooling: Optional
OLTC: Optional
MOQ: Customizable
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 10kv oil-immersed transformer manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality 10kv oil-immersed transformer made in China here from our factory. Contact us for more details.
10kV Oil Immersed OLTC Power Transformer, 500kv transformer, 10kv oil immersed transformer



