S11 315kVA 10kv Three Phase Oil-Immersed Electric Distribution Transformer
Nov 04, 2025
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The iron core of S11-M series low loss energy-saving transformer produced by our company adopts laminated structure.
This product is based on fully absorbing the advanced technology and process of domestic oil immersed transformer, combined with the technical level of our company, putting the reliability of the product in the first place, at the same time, the no-load loss and no-load current of the product are greatly reduced.
Advantages of a three-phase oil-immersed transformer S11-315KVA
-The core of silicon steel is made of 0.18 ~ 0.3mm orientation silicon steel sheet stacked by punching and shearing, which has good stability.
-The coil is made of pure copper. The acetal enamelled wire is used for high voltage and oxygen-free copper conductor or copper foil for low voltage to improve the short-circuit resistance.
-The Dyn11 connection symbol is used to avoid the influence of higher harmonics. It provides high resistance against uncompensated load and improves the quality of power supply.
-Vacuum oiling is adopted by the transformer to remove bubbles in the core and ensure stable insulating property.
Parameters of energy efficiency oil-Filled transformers
| Rated capacity(kVA) |
Voltage | Maximum no-load losses (kW) |
Maximum on-load losses(kW) |
Short circuit impedance Uk (% ) |
| 50 | 0.13 | 0.91/0.87 | 4 | |
| 63 | 0.15 | 1.09/1.04 | 4 | |
| 80 | 0.18 | 1.31/1.25 | 4 | |
| 100 | 0.20 | 1.58/1.50 | 4 | |
| 125 | 0.24 | 1.89/1.80 | 4 | |
| 160 | 0.28 | 2.31/2.20 | 4 | |
| 200 | 6.0 | 0.34 | 2.73/2.60 | 4 |
| 250 | 6.3 | 0.40 | 3.20/3.05 | 4 |
| 315 | 10 | 0.48 | 3.83/3.65 | 4 |
| 400 | 10.5 | 0.57 | 4.52/4.30 | 4 |
| 500 | 11 | 0.68 | 5.41/5.15 | 4 |
| 630 | 0.81 | 6.2 | 4.5 | |
| 800 | 0.98 | 7.5 | 4.5 | |
| 1000 | 1.15 | 10.3 | 4.5 | |
| 1250 | 1.36 | 12.0 | 4.5 | |
| 1600 | 1.64 | 14.5 | 4.5 | |
| 2000 | 1.94 | 18.3 | 4.5 | |
| 2500 | 2.29 | 21.2 | 4.5 |
Customization Optional
315kVA Oil Immersed Transformer
GNEE's three-phase oil-immersed transformers can be fully customized to meet your specific requirements. The optional specifications of the 315kVA three-phase oil-immersed transformer can adapt to different application scenarios and customer needs. In terms of voltage, the high-voltage side can be selected from common voltage levels such as 6kV, 10kV, and 35kV, and the low-voltage side is generally 0.4kV; other voltage values can also be customized on demand. There are two types of tap changers: on-load voltage regulation and off-excitation voltage regulation. On-load voltage regulation can adjust the voltage when the transformer is running to ensure voltage stability, which is suitable for places with high voltage quality requirements; off-excitation voltage regulation has a low cost and is suitable for environments with small voltage fluctuations.
In terms of cooling methods, in addition to the basic oil-immersed self-cooling (ONAN), oil-immersed air cooling (ONAF) can also be selected. When the transformer load is heavy or the ambient temperature is high, ONAF can accelerate heat dissipation through the fan to enhance the cooling effect. The protection level is optional, such as IP20 and IP23. IP20 can prevent the entry of larger solid foreign objects and is suitable for indoor clean environments; IP23 can also prevent water splashing on this basis and can be used outdoors or in humid environments.
In addition, an intelligent monitoring system can be equipped according to demand to monitor the temperature, humidity, load, winding temperature, and other parameters of the transformer in real time, and realize remote monitoring and fault warning. The insulation heat resistance level can also be customized, such as F level, H level, etc., to adapt to different operating temperatures and working conditions. There are also multiple options for grounding methods. The appropriate grounding scheme can be determined according to the power grid and installation environment to ensure safe operation.
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
Get Transformer Order specification
GNEE Transformer Order specification
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Demander: |
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Project technical leader: |
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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, Pakistan, Indonesia, Vietnam, Mongolia, Japan, Taiwan Province, Bangladesh, Sri Lanka, Lebanon, Saudi Arabia, Turkey, Armenia, Saudi Arabia, Saudi Arabia, 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, Mexico, Uruguay, Chile
Middle East: The Middle East region
Oceania: Australia, Papua New Guinea. Fiji