500kVA 33kV Oil Immersed Transformer
Nov 10, 2025
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introduction of 500kVA 33kV Oil Immersed Transformer
the rated power of the transformer is 500kVA, the primary voltage and secondary voltage of the transformer are 33/6.6kV. The transformer is equipped with high and low voltage fuses for better protection. Because of the fuse, the height of the transformer is much higher than that of the ordinary transformer. In addition, the transformer high and low voltage bushings are tilted at a 45° Angle to better connect the overhead cables.
Technical Specification
500kVA oil filled transformer to Trinidad and Tobago
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Model |
S-M-500kVA-33/6.6 |
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Type |
Oil Immersed Power Transformer |
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Standard |
IEC60076 |
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Rated Power |
500kVA |
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Frequency |
60 HZ |
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Phase |
Three |
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Cooling Type |
ONAN |
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Primary Voltage |
33 KV |
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Secondary Voltage |
6.6 KV |
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Winding Material |
Copper |
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Vector Group |
Dyn11 |
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Impedance |
5.12% |
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Tap Changer |
NLTC |
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Tapping Range |
±2*2.5% @ Primary Side |
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No Load Loss |
1.3 KW |
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On Load Loss |
6 KW |
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Accessories |
Standard Configuration |
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Remarks |
N/A |
500kVA 33kV Oil Type Transformer applications
- Residential and commercial power: Supplies electricity for lighting and other needs in residential areas and commercial centers.
- Industrial facilities: Used in industrial and mining enterprises to power machinery and other equipment.
- High-rise buildings: Provides power distribution for high-rise buildings.
- Transportation hubs: Supports electrical systems in places like subway stations and airports.
- Harsh environments: Its oil-immersed design makes it suitable for use in areas with flammable, explosive, or other harsh conditions, such as oil and gas production platforms.
How to Choose the High and Low Voltage Fuses for Transformers
When it comes to selecting the high and low voltage fuses for transformers, there are several factors to consider. These fuses play a critical role in ensuring the safe and reliable operation of transformers, which are used to step up or step down the voltage of electrical power.
Here are some key factors to consider when choosing the high and low voltage fuses for transformers:
1. Voltage Rating: The first and most important factor to consider is the voltage rating of the fuse. Make sure to choose a fuse with a voltage rating that matches the transformer's voltage rating to ensure optimal performance and safety.
2. Current Rating: Another critical factor to consider is the current rating of the fuse. Choose a fuse with a current rating that is suitable for the expected load of the transformer to prevent overloading and damage to the fuse.
3. Fuse Type: There are several types of fuses available, including cartridge fuses, blade fuses, and DIN fuses. Choose the type of fuse that is most appropriate for the transformer's design and application.
4. Breaking Capacity: The breaking capacity of a fuse refers to its ability to interrupt a fault current. Make sure to choose a fuse with a breaking capacity that exceeds the maximum expected fault current to ensure reliable operation and safety.
5. Time-Current Characteristics: The time-current characteristics of a fuse refer to its response time to different levels of fault current. Choose a fuse with time-current characteristics that are appropriate for the transformer's application and protection requirements.
6. Backup Protection: In some cases, it may be necessary to provide backup protection for the transformer in the form of a secondary fuse or circuit breaker. Make sure to choose backup protection that is compatible with the main fuse and provides the necessary level of protection.
In conclusion, selecting the high and low voltage fuses for transformers requires careful consideration of several factors. By taking the time to properly evaluate these factors, you can choose the right fuses for your transformer and ensure safe and reliable operation.
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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When choosing our company's products, please provide the following data to better serve you. |
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Demander |
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Demander: |
Telephonemethods: |
Fax: |
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Project technical leader: |
Telephonemethods: |
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, Pakistan, Indonesia, Vietnam, Mongolia, Japan, Taiwan Province, Bangladesh, Sri Lanka, Lebanon, Saudi Arabia, Turkey, Armenia, Saudi Arabia, Saudi Arabia, 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, Mexico, Uruguay, Chile
Middle East: The Middle East region
Oceania: Australia, Papua New Guinea. Fiji