315kVA Three Phase Oil Immersed Distribution Transformer
Nov 04, 2025
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Our series of three-phase oil-immersed power transformers are designed to meet a wide range of power requirements, offering rated capacities from 50kVA to 2500kVA. Whether for outdoor harsh environments or indoor substations, our transformers ensure stable power supply with high efficiency and safety.
Three Phase Oil Immersed Distribution Transformer Product Parameters
| Items | Item |
| Production Descriptions | Oil-Immersed Transformer |
| Reference standards | IEC 60076-11 |
| Capacity | 50-2500kVA or Customized |
| Frequency | 60 / 50Hz |
| Voltage (HV) | 22KV or customized |
| Voltage (LV) | 0.4KV or customized |
| Impedance | 4% |
| Connections (Vector Group) | Dyn11 |
| Tapping Range | ±2×2.5% |
| Core materials | Silicon Steel |
| Winding materials | Aluminum or copper |
| Lightning Impulse Withstand Voltage | IEC standard |
| AC withstand voltage | IEC standard |
| Temperature Rise class | H-class |
| Temperature Rise | 125K |
| Cooling method | AN/AF |
| Delivery Capacity | 300 units per month |
Model Meaning:
Oil Immersed Transformer Product characteristics
1. Winding structure:
The high-voltage winding is crafted using a sophisticated multi-layer cylindrical, continuous, or connecting continuous design. This innovation enhances the distribution of shocks throughout the winding, minimizes magnetic leakage, and provides exceptional mechanical strength with superior resistance to short-circuits.
2. Iron core design:
Our transformers leverage premium, cold-rolled, grain-oriented silicon steel sheets, meticulously arranged using a full diagonal seam stacking method. This not only reduces no-load loss but also significantly lowers no-load current.
3. Fastening and anti-loosening:
Robust fastening measures secure both the core and windings, incorporating self-locking anti-loosening nuts for high and low voltage leads. The innovative non-hanging center design withstands transportation vibrations, ensuring all fasteners remain secure during prolonged operation.
4. Vacuum processing:
Embrace advanced vacuum processing where coils and cores undergo vacuum drying, and transformer oil is filtered and injected in a vacuum. This meticulous process ensures minimal moisture, boosting transformer longevity and performance.
5. Oil tank design:
The oil tank features a corrugated sheet construction, equipped with a breathing function to adapt to oil volume changes from temperature variations. Designed without an oil storage cabinet, it effectively reduces the transformer's height, optimizing spatial efficiency.
6. Other features:
Boasting an elegant appearance and compact size, our transformers occupy minimal installation space, making them the ideal maintenance-free solution for modern power distribution needs.
Widely utilized across power plants, substations, industrial sectors, mining enterprises, and rural power grids, our transformers offer reliable solutions for varied power distribution systems.
Environment and Requirements:
- Ambient temperature: Temperature needs to be ideally maintained between a range of -25°C to +40°C.
- Altitude limit: Operational altitude should not exceed 1000 meters.
- Air humidity: Relative humidity should be kept below 90% at a temperature of +25ºC.
- Installation place: Select an installation area devoid of corrosive gases and noticeable dirt for optimal performance and longevity.
Maintenance and upkeep:
- Regular inspection: Conduct frequent checks on oil levels and perform oil insulation strength tests. Should issues arise, promptly replace the transformer oil to ensure optimal functionality.
- Stable operation: To maintain the stability of the transformer, prevent overloads and other anomalies such as short circuits.
- Safety attention: Prior to installation, address ventilation and fire prevention issues in adherence with technical specifications to ensure safe and correct installation.
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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Project technical leader: |
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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