S11 250KVA 10/0.4kV oil immersed transformer
Nov 03, 2025
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Performance and features of S11 oil immersed transformer
The fully sealed power transformer uses the fins of the corrugated oil tank body as heat dissipation and cooling elements. The fins can expand and contract with the expansion and contraction of the transformer oil volume, thereby isolating the inside of the transformer from the atmosphere, preventing oil deterioration and insulation from moisture and aging. The core is made of high-quality cold-rolled oriented silicon steel sheets, which effectively improves the condition of magnetic flux density inside the core, reduces noise, and reduces losses.
The coil is wound with high-strength enameled wire (or paper-wrapped wire), cylindrical (or pancake) structure, uniform ampere-turn distribution, reasonable insulation structure, and strong short-circuit resistance. The surface of the oil tank is phosphated and then three-proof (moisture-proof, mildew-proof, and salt spray-proof coating) is adopted, which is widely used in metallurgy, mining, petrochemical and other places with harsh use environment.
oil Filled transformer Performance Parameters
| Rated capacity (kVA) | Voltagegroup | Vectorgroup | Loss (W) | No-load current (%) | Impedance voltage (%) | Boundan dimension (L×W×H,mm) | Weight (kg) | ||
| HV (kV) | LV(kV) | No-loadloss(W) | Loadloss(W) | ||||||
| 30 | 11 10.5 10 6 | 0.4 | Dyn11 or Yyn0 | 100 | 630/600 | 1.5 | 4 | 670×310×615 | 346 |
| 50 | 130 | 910/870 | 1.3 | 700×325×630 | 417 | ||||
| 80 | 180 | 1310/1250 | 1.2 | 755×355×690 | 556 | ||||
| 100 | 200 | 1580/1500 | 1.1 | 785×360×685 | 619 | ||||
| 125 | 240 | 1890/1800 | 1.1 | 805×370×720 | 703 | ||||
| 160 | 280 | 2310/2200 | 1.0 | 850×385×735 | 794 | ||||
| 200 | 340 | 2730/2600 | 1.0 | 865×405×805 | 935 | ||||
| 250 | 400 | 3200/3050 | 0.9 | 905×415×935 | 1086 | ||||
| 315 | 480 | 3830/3650 | 0.9 | 925×440×915 | 1226 | ||||
| 400 | 570 | 4520/4300 | 0.8 | 970×465×960 | 1468 | ||||
| 500 | 680 | 5410/5150 | 0.8 | 1035×500×1010 | 1758 | ||||
| 630 | 810 | 6200 | 0.6 | 4.5 | 1110×525×1075 | 2074 | |||
| 800 | 980 | 7500 | 0.6 | 1190×580×1155 | 2840 | ||||
| 1000 | 1150 | 10300 | 0.6 | 1205×560×1195 | 2842 | ||||
| 1250 | 1360 | 12000 | 0.5 | 1185×590×1205 | 3168 | ||||
| 1600 | 1640 | 14500 | 0.5 | 1225×565×1345 | 3800 | ||||
| 2000 | 1940 | 18300 | 0.4 | 5.0 | 1310×615×1435 | 4633 | |||
| 2500 | 2290 | 21200 | 0.4 | 1390×660×1510 | 5329 | ||||
Customization Optional
250kVA Oil Immersed Transformer
GNEE's three-phase oil-immersed transformers can be fully customized to meet your specific requirements. The Optional Specifications for a 250kVA Three-Phase Oil-Immersed Transformer can include various customizations and features that enhance its performance, reliability, or suitability for specific applications. These options may involve different types of tap changer mechanisms, such as manual or motorized tap changers, allowing for voltage regulation under load. Additionally, the transformer may be equipped with advanced protection devices like temperature sensors, pressure relief valves, or Buchholz relays for enhanced safety and early fault detection. The transformer's bushings could also be selected in various configurations, including silicone or porcelain types, depending on the environmental and electrical requirements.
To further improve operational efficiency, options for higher-grade insulating oil, such as biodegradable or eco-friendly oils, may be available. For outdoor installations, the transformer could include weatherproof enclosures or corrosion-resistant coatings for extended durability in harsh environments. Other optional specifications might include noise reduction features, such as soundproof enclosures, and compliance with specific standards or certifications, like IEC or IEEE, to meet local regulatory requirements. These optional features allow the transformer to be tailored to specific operational needs and environmental conditions.
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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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