600kVA 20kv/0.4kv Three Phase Oil-Immersed Distribution Transformer for Solar Photovoltaic Power System Solar Photovoltaic Storage System
Nov 03, 2025
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The three-phase oil-immersed transformer is manufactured with premium silicon steel and oxygen-free copper windings. It features low loss, low noise, and high efficiency. With oil used for insulation and cooling, it ensures stable performance under various operating conditions. It is widely applied in power transmission and distribution systems, industrial facilities, and infrastructure projects.
Three Phase Oil-Immersed Distribution Transformer Specification
Technical data of S13-M 20kV three-phase full seal non excitation voltage regulating distribution transformer
| 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(%) |
| 50 | 20 | ±5 or ±2x2.5% | 0.4 | Ydn11 or Yyn0 | 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 Usage conditions
1. Maximum ambient temperature:+40 ºC
2. Minimum ambient temperature: -25 ºC
Altitude:<1000m3
A. Maximum monthly average relative humidity: 90% (20 ºC) 5. Installation location: Installed in a place without fire, explosion hazard, serious pollution, chemical corrosion, and severe vibration, indoors or outdoors.
Execution standards
GB 1094.1 Power Transformers
GBTT 15164 Load Guide for Oil immersed Power Transformers
GB/T 6451 Technical Parameters and Requirements for Three phase Oil immersed Power Transformers
GB 2536 Transformer Oil
JB/T 3837 Method for Model Designation of Transformer Products
JB/T 501 Test Guidelines for Power Transformers
GB1094.3 Insulation level and insulation test of power transformers - Air gap for external insulation
DL/T572
Transformer Operation Regulations
The above standards shall be subject to the latest release; Other requirements of the equipment should be based on the latest national or professional standards.
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
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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