400 KVA 11KV Oil Immersed Transformer
Nov 10, 2025
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The rated power of the transformer is 400 KVA. the primary voltage of the transformer is 11 KV and secondary voltage is 0.415 KV. Different from dry type transformer, it is a Liquid Dielectric Transformer, using mineral oil as cooling material. Our 400 KVA transformer was designed with advanced technology and adopts high quality material and components which result in reliable quality and long operation time.
Technical Specification
400 KVA Oil Immersed Transformer to Viet Nam
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Model |
S11-400 KVA-11/0.415KV |
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Type |
Oil Immersed Transformer |
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Standard |
IEC60076 |
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Rated Power |
400KVA |
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Frequency |
50 HZ |
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Phase |
Three |
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Cooling Type |
ONAN |
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Primary Voltage |
11 KV |
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Secondary Voltage |
0.415 KV |
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Winding Material |
Copper |
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Vector Group |
Dyn11 |
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Impedance |
5% |
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Tap Changer |
NLTC |
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Tapping Range |
±2*2.5% |
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No Load Loss |
0.57W |
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On Load Loss |
4.3KW |
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Accessories |
Standard Configuration |
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Remarks |
N/A |
400 KVA 11KV Oil Filled Transformer Applications
- Building infrastructure: Hospitals, shopping malls, residential and commercial towers.
- Industrial: Factories, manufacturing plants, and other industrial facilities.
- Utility: Step-down points in utility substations to provide power for distribution networks.
- Infrastructure: Airports, subway stations, and bridges.
- Oil and Gas: Refineries and petrochemical plants.
- Water and Wastewater: Treatment plants.
There are two common types of transformer tank:
1. Barrel type Tank: Generally used for small and medium-sized transformers
2. Bell type tank: for large transformers.
Transformer knowledge
Pressure relief valve: The pressure relief valve is mounted on top of the transformer. In case of transformer failure, when the pressure in the oil tank increases to a certain value, the pressure relief valve ACTS to release the pressure in the oil tank, thus protecting the oil tank itself.
Precautions for transformer testing:
1,Transformers must be tested in a dry, insulated and stable place
2,The operator must wear insulating gloves and stand on the insulating mat to operate
3,The test must be carried out in the designated area, unrelated personnel away from the scene
4,The test must be performed by two persons, one for operation and one for monitoring
5,Check the high pressure handle and wire of the high pressure withstand voltage tester for any damage before test
6,After the end of the test, it is confirmed that there is no high voltage output before removing the connection line
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.
transformer Workshop equipment display
types of transformer from GNEE
Get Transformer Order specification
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