S11 Series Three Phase Oil Immersed Distribution Transformer
Nov 11, 2025
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The S11 series is a type of three-phase oil-immersed distribution transformer known for being energy-efficient, reliable, and requiring low maintenance. It uses a fully sealed, corrugated oil tank that isolates the transformer oil from the air to slow down oil and insulator aging, while the core is made from high-quality cold-rolled silicon steel for high efficiency. Key features include low loss, low noise, a strong ability to withstand short circuits, and a design that extends its service life without needing a conservator tank.
S11 Series Three Phase Oil Immersed Distribution Transformer feature
lron core:
the iron core is made by crystal grain-oriented silicon-steel sheet; GEORG cross cut shear (made in West Germany) is adopted to cut the silicon-steel sheet with a 45*joint seam; fold the sheet into a multistage roll cross-section to reduce the noise and power consumption.
Coil:
cylinder type for high voltage; cylinder type or foil type for low voltage; this can increase the ability to resist short circuit and strike; and the distribution of magnetic path is more rational.
Oil tank:
the oil tank is made by fine cold-rolled steel sheets; GEORG corrugation oil tank production-line is adopted; to meet environmental needs, then, antiseptic coating material is applied on the surface, which can meet the requirements for petroleum and chemical industry (much oil stain and many chemical substances). In addition, the corrugations not any possess heat radiation function, but also meet the requirement for oil expansion and oil contraction trader normal performance. The isolation from air guarantees a low aging speed of oil and a long life expectancy of transformer.
Insulation structure:
oil-immersed distribution transformer adopts A-level insulation structure; high voltage coil and low voltage coil are concentric; the space between coils is cardboard sleeve small oil clearance oil partition structure.
Model
Three Phase Oil Immersed Transformer Technical Parameters
| Rated Capacity | Voltage Combination | Vector Group | No-load Loss | Load Loss | No-load Current | Impedance Voltage | Total Weight | Exterior Size | Installation center /Installation hole |
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| (kVA) | High voltage (kV) |
Tap range | Low voltage (kV) |
(W) | (W) | (%) | (%) | (kg) | (L*W*H) (mm) | (mm) | |
| 30 | 6 6.3 10 10.5 11 |
±5% or ±2*2.5% |
0.4 | Ydn0 or Dyn11 |
100 | 630/600 | 1.8 | 4.0 | 335 | 1030*690*860 | 400*400/4*Φ14 |
| 50 | 130 | 910/870 | 1.6 | 410 | 1045*700*925 | 400*400/4*Φ14 | |||||
| 63 | 150 | 1090/1040 | 1.5 | 460 | 1075*710*940 | 400*400/4*Φ14 | |||||
| 80 | 180 | 1310/1250 | 1.4 | 490 | 1080*715*995 | 400*400/4*Φ19 | |||||
| 100 | 200 | 1580/1500 | 1.3 | 550 | 1110*730*1020 | 400*400(550)/4*Φ19 | |||||
| 125 | 240 | 1890/1800 | 1.2 | 615 | 1135*740*1035 | 400*400(550)/4*Φ19 | |||||
| 160 | 280 | 2310/2200 | 1.1 | 695 | 1155*755*1050 | 550*550/4*Φ19 | |||||
| 200 | 340 | 2730/2600 | 1 | 790 | 1200*770*1075 | 550*550/4*Φ19 | |||||
| 250 | 400 | 3200/3050 | 0.9 | 930 | 1240*800*1100 | 550*550/4*Φ19 | |||||
| 315 | 480 | 3830/3650 | 0.8 | 1110 | 1305*840*1120 | 550*550/4*Φ19 | |||||
| 400 | 570 | 4520/4300 | 0.7 | 1290 | 1390*900*1160 | 660*660/4*Φ19 | |||||
| 500 | 680 | 5410/5150 | 0.7 | 1510 | 1500*990*1195 | 660*660/4*Φ19 | |||||
| 630 | 810 | 6200 | 0.6 | 4.5 | 1730 | 1580*1030*1305 | 660*660/4*Φ19 | ||||
| 800 | 980 | 7500 | 0.6 | 2075 | 1705*1140*1360 | 820*820/4*Φ19 | |||||
| 1000 | 1150 | 10300 | 0.5 | 2490 | 1730*1290*1395 | 820*820/4*Φ19 | |||||
| 1250 | 1360 | 12000 | 0.4 | 2960 | 1780*1320*1480 | 820*820/4*Φ19 | |||||
| 1600 | 1640 | 14500 | 0.4 | 3515 | 1890*1430*1520 | 820*820/4*Φ19 | |||||
| 2000 | 1940 | 18300 | 0.4 | 5 | 4880 | 2050*1360*1840 | 820*820/4*Φ19 | ||||
| 2500 | 2290 | 21200 | 0.4 | 6010 | 2170*1430*2015 | 1070*1070/4*Φ19 | |||||
200 KVA power transformer to China
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Model |
S11-200 KVA-11/0.4KV |
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Type |
Oil Immersed Distribution Transformer |
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Standard |
IEC60076 |
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Rated Power |
200 KVA |
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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 |
400 V |
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Winding Material |
Copper |
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Vector Group |
Dyn11 |
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Impedance |
4% |
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Tap Changer |
NLTC |
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Tapping Range |
±2*2.5% |
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No Load Loss |
0.34KW |
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On Load Loss |
2.6KW |
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Accessories |
Standard Configuration |
Three Phase Oil filled Transformer applications
- Power distribution: For stepping down high voltages to lower voltages for distribution in industrial and agricultural power grids.
- Industrial and mining applications: In industrial facilities and mines for their specific power requirements.
- Urban and rural power grid upgrades: As a key component in upgrading and expanding power grids.
- Substations: Used in combined and prefabricated substations.
- General power distribution: Applicable to a wide range of applications, including lighting and other general power needs in commercial and residential areas.
Purpose of measuring winding resistance：
1. Whether the wire is welded or connected in good condition.
2. Whether the wire specification and resistivity meet the requirements.
3. Whether the resistances of each phase are balanced.
4. Provide basis for temperature rise test.
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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Demander: |
Telephonemethods: |
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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, 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