The S11-M series oil-immersed distribution transformer is a low-loss, high-efficiency power transformer designed for 10kV distribution systems. It features a hermetically sealed tank structure, which prevents oil leakage and enhances long-term reliability.
High Efficiency Core
Laminated by high permeability and low loss cold rolled silicon steel, reducing no-load loss and noise.
Compact Structure
Reduces radial force in short-circuit conditions and withstands high sudden short-circuit current.
Maintenance Free
Hermetically sealed structure ensures long service life without the need for frequent maintenance.
Technical Parameters
Rated Capacity (KVA)
Rated Voltage (KV)
Short-circuit Impedance (%)
No-Load Losses (W)
Load Losses (W)
Outline Dimension (LxWxH, mm)
HV
LV
30
6 / 10 / 11
0.4
4.0
100
630/600
1070x695x1015
100
0.4
4.0
200
1580/1500
1150×750×1200
250
0.4
4.0
400
3200/3050
1270×830×1390
500
0.4
4.0
680
5410/5150
1485x1015x1450
1000
0.4
4.5
1150
10300
1700x1220x1590
2500
0.4
4.5
2290
21200
2600x2250×2470
* Note: Data for reference only. Please refer to appearance drawings when ordering.
Manufacturing Excellence
As a professional manufacturer of power equipment, we specialize in the development and production of oil-immersed power transformers, dry-type transformers, combined transformers, and prefabricated substations. Our products are widely used in power grids, power stations, metallurgy, chemical industries, and new energy fields.
Quality Control & Delivery
Frequently Asked Questions
Do your products hold international quality certifications?
Yes, our facility is ISO 9001 certified. Our products comply with international standards such as IEC (International Electrotechnical Commission) and CE. We can also provide specific certifications upon request.
What is the annual production capacity for transformers?
We operate a modern production base with an annual capacity exceeding 10,000 units, ranging from 30KVA to 20MVA for both oil-immersed and dry-type transformers.
How do you ensure the quality of each transformer?
Quality is ensured through strict source control of raw materials, quality checkpoints at critical production stages, and rigorous final factory testing before shipment.
What are the main differences between your oil-immersed and dry-type transformers?
Oil-immersed transformers are cost-effective and ideal for outdoor or large industrial projects. Dry-type transformers are preferred for indoor use, commercial buildings, and hospitals due to their high fire safety standards.
What winding materials do you use in your transformers?
We offer both copper and aluminum windings. Copper provides higher conductivity and efficiency, while aluminum offers a more cost-effective solution for specific project requirements.
Are the S11-M series transformers maintenance-free?
Yes, the S11-M series features a hermetically sealed structure which prevents oil oxidation and moisture entry, making them virtually maintenance-free with a long service life.
Smrtr Technology
