33kv 35kv Oil-Immersed Power Transformer
Nov 05, 2025
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Advantages of material selection:
① Silicon steel sheet: Use the best silicon steel sheets from Baosteel and Wugang Iron and Steel in China, with high quality, high permeability and low loss; ② Conductive rod: Highly conductive H62 material, effectively reducing heat generation and ensuring equipment stability; ③ Insulation system: New mineral insulating oil, enhanced insulation/extended life; ④ Tansformer box: Made of national standard high-quality steel plate profile, mechanical strength ≥345MPa, durable life >30 years. ⑤ Silicon steel sheets: Utilizing the best silicon steel sheets from Baosteel and Wuhan Iron and Steel in the country, they are of high quality and high permeability, reducing waste. |
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Oil-Immersed Power Transformer Application
1. Power Grid Infrastructure
Deployed in substations and grid nodes to ensure stable voltage regulation and efficient energy transmission over long distances. Proven reliability in both urban and rural utility networks.
2. Industrial & Mining Facilities
With high mechanical strength, low loss, and reduced noise, these transformers meet the heavy load demands of industrial plants, mines, steelworks, and manufacturing lines.
3. Renewable Energy Projects
Seamlessly integrated into solar farms, wind power stations, and other renewable generation systems to step up/down voltage and stabilize output to the grid.
4. Commercial Complexes & Data Centers
Ensures uninterrupted and low-noise power supply for commercial buildings, data centers, hospitals, airports, and other high-load urban infrastructures.
5. Oil & Gas and Petrochemical Sites
Resistant to harsh environments with high fire safety, stable insulation systems, and long lifespan-ideal for remote or extreme conditions.
Technical Parameter for S Series 33kv No-load Voltage Regulation Transformer
| Rated Capacity (KVA) | Voltage Combination | Connection Group Symbol | No-load Loss R(W) | Load Loss R(W) | Impedance Voltage(%) | No-load Current (%) | L*W*H (mm) | Gauge Horizontal*Vertical (mm) | Active parts Weight (kg) * Oil Weight (kg) | Total Weight (kg) | ||
| High Voltage(KV) | Tapping Range of High Voltage | Low Voltage (KV) | ||||||||||
| 50 |
33 35 38.5 |
±5% ±2x2.5% | 0.4 | Dyn11 Yyn0 | 160 | 1200/1140 | 6.5 | 1.3 | 1195*935*1825 | 660*660 | 300*330 | 860 |
| 100 | 230 | 2010/1910 | 1.1 | 1200*995*1935 | 660*660 | 470*383 | 1130 | |||||
| 125 | 270 | 2370/2260 | 1.1 | 1235*940*1955 | 660*660 | 550*465 | 1335 | |||||
| 160 | 280 | 2820/2680 | 1 | 1285*895*1950 | 660*660 | 580*485 | 1475 | |||||
| 200 | 340 | 3320/3160 | 1 | 1310*1150*1985 | 660*660 | 680*595 | 1755 | |||||
| 250 | 400 | 3950/3760 | 0.95 | 1450*1090*2010 | 660*660 | 860*650 | 2000 | |||||
| 315 | 480 | 4750/4530 | 0.95 | 1930*1065*2320 | 820*820 | 980*765 | 2290 | |||||
| 400 | 580 | 5740/5470 | 0.85 | 1850*1165*2015 | 820*820 | 1170*885 | 2725 | |||||
| 500 | 680 | 6910/6580 | 0.85 | 2045*1205*2415 | 820*820 | 1340*960 | 3090 | |||||
| 630 | 830 | 7860 | 0.65 | 2085*1240*2515 | 660*660 | 1550*895 | 3810 | |||||
| 800 | 980 | 9400 | 0.65 | 2305*1615*2685 | 820*820 | 1990*1030 | 4510 | |||||
| 1000 | 1150 | 11500 | 0.65 | 2545*1540*2590 | 1070*1070 | 2415*1475 | 5055 | |||||
| 1250 | 1400 | 13900 | 0.6 | 2495*2010*2675 | 820*820 | 2480*1405 | 5290 | |||||
| 1600 | 1690 | 16600 | 0.6 | 2680*2100*2770 | 820*820 | 2600*1490 | 5450 | |||||
| 2000 | 1990 | 19700 | 0.55 | 2790*2180*2860 | 820*820 | 2720*1590 | 5600 | |||||
| 2500 | 2360 | 23200 | 0.55 | 2900*2290*2980 | 1070*1070 | 2830*1720 | 5760 | |||||
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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When choosing our company's products, please provide the following data to better serve you. |
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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, 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