125kVA 10kV S11 Oil-Immersed Distribution Transformer
Oct 30, 2025
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Environment |
Altitude not exceeding 1000m |
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Environmental Temp. |
-25℃ ~ +40℃ |
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Rated Voltage |
10kV 11kV 33kV 35kV /0.4kV(High/Low) |
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Rated Capacity |
30kVA-2500kVA
or Customized |
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Lightning Impulse Voltage |
75kV |
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Noise Level |
50dp |
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Cooling Method |
Oil-Immersed cooling |
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Protection Level |
IP54 |
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Mechanical Life Span |
25~30 Years |
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Rated Frequency |
50HZ |
Key Features of the10kV 20kV S11-M, 13-M, S20-M, S22-M
Oil-Immersed Distribution Transformers
1. High Efficiency and Energy Savings
* Core material: High-quality cold-rolled silicon steel laminations ensure uniform magnetic flux distribution, reducing no-load losses by ~30% compared to the S9 series, compliant with China's Class II energy efficiency standards.
* Fully sealed structure: Minimizes oil-air contact, delays oil aging, and lowers operational maintenance costs.
2. Wide Capacity Range
* Capacity range: 10-8000kVA, suitable for diverse applications (e.g., small residential areas to large industrial parks).
* Rated voltage: 10kV, designed for terminal voltage reduction in distribution networks (e.g., 10kV/0.4kV), meeting urban and rural grid upgrade requirements.
3. Optimized Structural Design
* Corrugated tank or radiator fins: Eliminates the need for an oil conservator, allowing automatic oil volume adjustment via tank deformation; leak-proof and maintenance-free.
* Copper/aluminum foil windings: Enhanced short-circuit withstand capability, low temperature rise, and superior overload performance.
4. Environmental Adaptability
* Insulating oil (mineral oil or synthetic ester) ensures effective heat dissipation and insulation, enabling stable
operation in -25℃ to 40℃ environments.
* IP54 protection rating: Dustproof and moisture-resistant, ideal for outdoor installation.
5. Safety and Reliability
* Built-in pressure relief valve and Buchholz relay for real-time fault monitoring (e.g., overheating, arcing), triggering
* Fully sealed design reduces fire hazards; certified for rigorous tests (short-circuit withstand, lightning impulse, etc.).
6. Cost-Effectiveness and Longevity
* Design lifespan: 25–30 years, with extended maintenance intervals (only periodic oil testing required) and low lifecycle costs.
10kV S11-M Oil-filled Transformer

company profile
GNEE TRANSFORMER has strong production capacity and an efficient marketing team.
Our transformer products include 500kV, 400kV, 330kV, 220kV, and 110kV ultra-high voltage transformers, various dry-type transformers/oil immersed transformers/amorphous alloy transformers of 35kV and below, new energy transformers, and prefabricated substations,
Export series: single-phase transformer, three-phase transformer, cylindrical transformer, isolation transformer, control transformer, voltage regulator and other products, And various specifications of special transformers such as grounding transformers, arc suppression coils, Bitcoin transformers, prefabricated cabins, reactors, electric furnace transformers, rectifier transformers, mining transformers, marine transformers, etc.
GNEE TRANSFORMER has successively passed ISO9001, ISO14001, ISO45001, SA8000 system certification. At the same time, 10kV and 35KV level distribution transformers and box type substations have obtained interna- tional Electrotechnical Commission IEC certification, US UL certification, German TUV certification, EU CE certification, Dutch KEMA certification, and GOST certification. Our product sales cover the global market, including 72 countries and regions such as the United States, Europe, Canada, Mexico, etc.
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types of transformer from GNEE
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GNEE Transformer Order specification
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When choosing our company's products, please provide the following data to better serve you. |
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Demander |
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Demander: |
Telephonemethods: |
Fax: |
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Project technical leader: |
Telephonemethods: |
Mailbox: |
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Transformer type selection |
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□Dry transformer {□SC(B) Epoxy resin □SC(B) Non-encapsulated} □American Box(ZGS) {□Terminal type(-Z-) □Ring network type(-H-)} □European Box change(YBM){□ Dry change □Oil change} |
□ Oil-immersed transformer{□ Fully sealed(-M-) □Oil-bearing pillow} □Amorphous alloy transformer{□Dry amorphous □ Oil amorphous} □ Special transformer{Rectifier, Furnace, Mine, Etc} |
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Transformer basic data selection
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Country of use: |
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Phase number: |
□Three-phase(S conventional) □ Monophase □Other( ) |
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Frequency: |
□50Hz(conventional) □60Hz □ Other( ) |
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Transformer oil: |
□#25(conventional) □#45(minimum temperature below-25℃) |
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Rated capacity: |
□( )kVA Conditions of use □Outdoor type □Indoor type |
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Altitude: |
□Less than 1000m(conventional) □1000-2000m □3000m以上 over |
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Rated voltage(High voltage) |
□6kV □10kV □20kV □35kV □66kV □110kV □220kV □Other( ) |
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Rated voltage(Low pressure) |
□0.4kV □0.66kV □10kV □10.5kV □35kV □其他 Other( ) |
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Connected group |
□Dyn11(conventional) □Yyn0 □YNd11 □li0(Single-phase) □Other( ) |
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Impedance(%): |
□4% □4.5% □5.5% □6% □6.5% □7.5% □8% □Other( ) |
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Voltage regulation mode |
□Voltage regulation without excitation(conventional) □On-load voltage regulation(Z) |
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Voltage regulation range |
□±2*2.5% □±5% □±3*2.5% □Other( ) |
Transformer accessory selection
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□Fan □Temperature control{□ Common □With 485 computer interface} □Dry case{□ Ordinary steel sheet □Aluminum alloy » Stainless steel} □Protection level of dry case(□IP20(Conventional) □IP( )} □Dry case height requirements{□None □Requirements[ ]} □ Cable out mode of the dry variable shell {□ Up-and-out □ Up-and-down □Down-in/DOWN-out □Down-in/UP-out □Down-in/DOWN-out □Down-in/ side-out [□Left □ Right-out]} |
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Note: 1. (Dry change requirements s 100kVA transformer does not include fans, such as fans, need to be charged 2. (Oil changes <630kVA transformer does not include temperature control, gas relay, if necessary, need to increase the fee) |
Other special requirements(additional charges apply below)
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Dry transformer |
□Shell and bottom plate{□Ordinary □Fully sealed} □Travel switch □Magnetic lo □Zero sequence transformer □Copper bar to the low voltage cabinet □Protective mesh □Lighting □100kVA or less Fan □Shock absorber |
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Oil-immersed transformer |
□No.45 oil for non-low temperature areas □Designated brand on-load voltage regulator □400kVA and below low voltage outlet OABC phase with wiring terminals □630kVA or below requires temperature control □800kVA or below Low voltage outlet phase 0 requires wiring terminals □630kVA and below must be equipped with gas relay |
GNEE TRANSFORMER Industrial Layout
Asia:China, Philippines, Cambodia, Malaysia, Myanmar, Indonesia, Vietnam, Mongolia, Japan, Taiwan Province, Bangladesh, Sri Lanka, Lebanon, Saudi Arabia, Turkey, Armenia, Iraq, Iran, Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan
Africa:Egypt, Ethiopia, Angola, Botswana, Burundi, Cape Verde, Congo, Guinea, Ghana, Gabon, Zimbabwe, Cameroon, Kenya, Rwanda, Malawi, Mauritius, Mauritania, Mozambique, South Africa, Nigeria, Somalia, Chad, Central Africa
North America: Aruba, Panama, Dominican Republic, Costa Rica, Honduras, Caribbean region,Canada, United States, Mexico, El Salvador, Guatemala, Jamaica
Europe: Bulgaria, North Macedonia, Finland, Norway, Ukraine, Greece, Hungary, Italy, United Kingdom
South America: Argentina, Paraguay, Ecuador, Colombia, Guyana, Venezuela, Uruguay, Chile
Middle East: The Middle East region
Oceania: Australia, Papua New Guinea. Fiji

