800kVA 20kv/0.4kv Three Phase Oil-Immersed Distribution Transformer for Solar Photovoltaic Power System Solar Photovoltaic Storage System
Nov 04, 2025
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3 Phase Oil Immersed Transformer
Product Features
Low noise: compact design structure, application of new materials and new technology, reduce noise, no oil storage tank, lower height than similar products.
Reliable long-term service life: The fully sealed power transformer case cover and the tank rim are bolted welded to isolate the contact between oil and air.
Small size and beautiful appearance: oil transformer series of transformer oil tanks use corrugated plate fins. When the oil temperature changes, the change in oil volume is adjusted and compensated by the elastic expansion and contraction of the corrugated sheets. The corrugated fuel tank is beautiful in appearance and small in size, with a small footprint.
Maintenance-free: Oil immersed Outdoor Distribution Transformer,the fully sealed transformer does not require maintenance.
S13-M 20kV three-phase full seal non excitation voltage regulating distribution transformer Specification
| Rated Power(kva) | High Voltage(kv) | High Voltage.Tap range | Low Voltage(kv) | Connection symbol | No-load loss(kw) | load loss(W) 75° | Short clroult Impedance (%) | No-load current(%) |
| 30 | 20 | ±5 or ±2x2.5% | 0.4 | Ydn11 or Yyn0 | 80 | 690/660 | 5.5 | 2 |
| 50 | 100 | 1010/960 | 5.5 | 1.9 | ||||
| 63 | 110 | 1200/1150 | 5.5 | 1.8 | ||||
| 80 | 130 | 1440/1370 | 5.5 | 1.7 | ||||
| 100 | 150 | 1730/1650 | 5.5 | 1.5 | ||||
| 125 | 170 | 2080/1980 | 5.5 | 1.5 | ||||
| 160 | 200 | 2540/2420 | 5.5 | 1.3 | ||||
| 200 | 140 | 3000/3860 | 5.5 | 1.2 | ||||
| 250 | 190 | 3520/3360 | 5.5 | 1.1 | ||||
| 315 | 340 | 4210/4010 | 5.5 | 1 | ||||
| 400 | 410 | 4970/4730 | 5.5 | 0.9 | ||||
| 500 | 480 | 5940/5660 | 5.5 | 0.9 | ||||
| 630 | 570 | 6820 | 6 | 0.8 | ||||
| 800 | 700 | 8250 | 6 | 0.7 | ||||
| 1000 | 830 | 12000 | 6 | 0.6 | ||||
| 1250 | 970 | 13200 | 6 | 0.6 | ||||
| 1600 | 1170 | 15950 | 6 | 0.5 | ||||
| 2000 | 1380 | 19140 | 6 | 0.5 | ||||
| 2500 | 1640 | 22220 | 6 | 0.4 |
Insulation Level
| Voltage grade(kV) | Maximum operating voltage (effective value) | Rated short duration Power frequency withstand voltage kV/minute | lightning Impulse withstand voltage kV (peak) | |
| Full wave | Chopped wave | |||
| 0.4 | 0.46 | 5 | 75 | 85 |
| 10 | 12 | 35 | 75 | 85 |
| 20 | 23 | 55 | 125 | 140 |
oil filled transformer Application Benefits
Safety-focused scenarios - hospitals, schools, shopping malls
-No Oil Leakage: fully enclosed design eliminates oil leakage risks, suitable for high-traffic areas.
-Superior Adaptability: the transformer operates stably whether in damp basement environments or facing sudden outdoor temperature changes
Cost-sensitive clients - factories, real estates
-Save on electricity costs: optimally designed core and windings consume 15%+ less energy than standard models.
-Save on maintenance: the sealing technology prevents moisture and dust ingress, resulting in almost zero upkeep during lifespan.
-Save on space: no external conservator cuts installation space by 30%.
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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Demander |
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Demander: |
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Fax: |
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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