315kVA Hermetically Sealed Type Transformer Oil Filling Transformer
Nov 03, 2025
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Hermetically Sealed Type Transformer Oil Filling Transformer, unlike conventional transformers, this model uses a hermetically sealed structure that prevents air contact with the insulating oil, significantly reducing oil aging, moisture ingress, and maintenance requirements. It is widely applied in power distribution networks, renewable energy projects, industrial plants, and commercial facilities.
Hermetically Sealed oil-immersed transformer Key Features:
- Hermetically Sealed Design: Prevents oxidation and moisture contamination, extending transformer oil and insulation lifespan.
- High Efficiency: Optimized magnetic core and winding design reduce no-load and load losses, achieving energy-saving performance.
- Oil Filling Technology: Uses high-quality mineral oil or biodegradable ester oil with vacuum oil filling, ensuring excellent insulation and heat dissipation.
- Maintenance-Free Operation: Eliminates the need for frequent oil testing and topping, lowering operational costs.
- Compact and Durable: Corrosion-resistant tank with pressure relief protection, suitable for both indoor and outdoor installation.
- Environmental Safety: Leak-proof structure minimizes risk of environmental contamination.
Advantages of Hermetically Sealed Oil Transformers:
- Improved reliability in harsh environments (humidity, dust, salt spray)
- Reduced maintenance cost and downtime
- High overload capacity and thermal stability
- Suitable for smart grid and renewable energy integration
Applications:
Urban and rural power distribution networks
Industrial plants and factories
Renewable energy (wind farms, solar PV plants)
Commercial complexes and data centers
Remote and harsh environment installations
Technical Parameter for S Series 6kv - 11kv No-load Voltage Regulation Transformers
| 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) | ||||||||||
| 30 | 6 6.3 10 10.5 11 | ±5% ±2x2.5% | 0.4 | Dyn11 Yzn11 Yyn0 | 100 | 630/600 | 4 | 2.8 | 980*735*1145 | 400*400 | 178*78 | 355 |
| 50 | 130 | 910/870 | 2.5 | 1017*758*1205 | 450*400 | 240*92 | 415 | |||||
| 63 | 150 | 1090/1040 | 2.4 | 1035*785*1285 | 450*400 | 285*105 | 505 | |||||
| 80 | 180 | 1310/1250 | 2.2 | 1065*800*1290 | 450*400 | 330*110 | 540 | |||||
| 100 | 200 | 1580/1500 | 2.1 | 1072*820*1305 | 450*400 | 345*116 | 590 | |||||
| 125 | 240 | 1890/1800 | 2 | 1155*1105*1310 | 450*400 | 415*135 | 705 | |||||
| 160 | 280 | 2310/2200 | 1.9 | 1235*850*1535 | 550*550 | 485*135 | 835 | |||||
| 200 | 340 | 2730/2600 | 1.8 | 1282*860*1557 | 550*550 | 582*168 | 965 | |||||
| 250 | 400 | 3200/3050 | 1.7 | 1310*940*1605 | 550*550 | 695*210 | 1135 | |||||
| 315 | 480 | 3830/3650 | 1.6 | 1465*1120*1915 | 660*650 | 855*255 | 1520 | |||||
| 400 | 570 | 4520/4300 | 1.5 | 1440*1165*1725 | 660*650 | 950*295 | 1590 | |||||
| 500 | 680 | 5410/5150 | 1.4 | 1510*1250*1845 | 660*650 | 1150*320 | 1905 | |||||
| 630 | 810 | 6200 | 4.5 | 1.3 | 1650*1140*1920 | 660*650 | 1500*435 | 2015 | ||||
| 800 | 980 | 7500 | 1.2 | 2125*1175*2315 | 820*820 | 1910*760 | 3510 | |||||
| 1000 | 1150 | 10300 | 1.1 | 2150*1380*2570 | 820*820 | 2125*880 | 3850 | |||||
| 1250 | 1360 | 12000 | 1 | 2355*1485*2570 | 820*820 | 2605*960 | 4610 | |||||
| 1600 | 1640 | 14500 | 0.9 | 2335*1750*2630 | 820*820 | 3125*1150 | 5420 | |||||
| 2000 | 1940 | 18300 | 5 | 0.4 | 1940*1400*1700 | 820*820 | 2420*780 | 4200 | ||||
| 2500 | 2290 | 21200 | 0.4 | 2050*1480*1800 | 820*820 | 2560*780 | 4680 | |||||
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, 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