Product Overview
1250kVA power transformer is a large power transformer for 10kV distribution networks. It can step down 10kV to 0.4kV, stably supporting approximately 1000kW active load, and is suitable for large factories, industrial parks, and regional substations. The product adopts a fully sealed structure and external plate type heat sinks. The standard cooling method is ONAN (oil immersed self cooled), which can be upgraded to ONAF (oil immersed air cooled) for high temperature or high load conditions. The short circuit impedance is 4.5%, and the recommended connection group is Dyn11.
The 1250kVA power transformer has a wide range of applications: it can be used as a step down transformer to meet various voltage conversion needs, and as a three phase distribution transformer in industrial power systems. Leveraging mature standardized design and large scale production, our company manufactures in strict accordance with multiple international and regional standards such as IEC, GB, JIS, ANSI, IEEE, and UL, meeting Level 1/Level 2 energy efficiency requirements. All products have passed factory testing and authoritative certifications.
Technical Specifications
|
Parameters |
Technical Specifications |
|
Model |
Power Transformer |
|
Rated capacity |
1250kVA (customizable upon request) |
|
Input voltage (high voltage) |
6.6kV,10kV,11kV,20kV,35kV(Customization available upon request) |
|
Output voltage (low voltage) |
0.38kV,0.4kV(Customization available upon request) |
|
Voltage regulation range |
±5%,±2×2.5%(Customization available upon request) |
|
Number of phases |
Three phase (single phase can also be specified) |
|
Frequency |
50Hz/60Hz |
|
Link Group |
Dyn11,Yyn0,Yd11,Dyn5(Customization available upon request) |
|
Winding material |
Copper / Aluminum |
|
No load loss |
Meets national standards / IEC Level 1 / Level 2 energy efficiency |
|
Load loss |
Meets national standards / IEC Level 1 / Level 2 energy efficiency |
|
No load current |
Standard design values, low loss optimization |
|
Temperature rise limit |
≤60K (oil top layer) |
|
Short circuit impedance |
Customization available upon request |
|
Cooling method |
ONAN(Oil immersion and self cooling) |
|
Insulation class |
Grade A |
|
Partial discharge |
≤20pC (Standard requirement) |
|
Implementation Standards |
IEC,GB,JIS,ANSI,IEEE,UL |
Product Information and Certificates
We provide the following complete technical documentation and quality documents:
• Material Safety Data Sheet (MSDS)
• Factory Test Report
• Certificate of Conformity
• Product Certificate
• Product Installation and Operation Manual
Regarding Union Power
We have been exporting our products to global markets since 2011. As your trusted partner, we deliver customized transformers, OEM projects, and complete power packages. Our product portfolio covers step‑down, three‑phase, and miniature transformers to suit a wide variety of project needs.
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