2500kVA Oil Immersed Transformer
NPC ELECTRIC's 2500kVA oil-immersed transformer is designed with international advanced technology and complies with international standards such as IEC, ANSI, and ISO. It has high efficiency, low noise, and excellent thermal stability. This transformer is widely used in power transmission and distribution systems to ensure a stable and reliable power supply. With its durable structure and excellent performance, NPC ELECTRIC's 2500kVA oil-immersed transformer provides safe and efficient energy solutions for users around the world.
- Primary Voltage Ratings 34.5-19.92/13.8-7.957/13.2-7.62/12.47-7.2, 24.94, 26.25, 33 or others
- Secondary Voltage Ratings 480/277V, 400/230V, 380/220V or customized
- H.V. Tap Range ± 2×2.5% HV taps or others
- Type Oil immersed distribution transformer
- BIL 30/95kV
- Standards IEEE, ANSI, NEMA, IEC, CE
- Application Temporary Power Supply Systems, Utilities
- Power Rating 2500kVA
- Certificate UL, CESI, IEEE
- Cooling Method ONAN, ONAN/ONAF, KNAN, KNAN/KNAF
- Oil Mineral Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
2500kVA Oil Immersed Transformer
Technical Specifications
Accessories
| Technical Specifications | ||
| Rated Power | 2500 kVA | |
| Rating Primary Voltage | 2.4 - 34.5kV | |
| Secondary Voltage | 480/277V 400/230V 380/220V Customized |
|
| Frequency | 50/60Hz | |
| Vector Group | Dyn11, Yyn0, Dyn5 | |
| Winding Material | Aluminum/Copper | |
| Efficiency | As IEEE, Doe 2016, CAS Std or Customized | |
| Impedance Voltage | Nominal 2% or Customized 1.1 - 5.75% | |
| Altitude | ≤1,000m or Customized | |
| Color | ANSI 70 Light gray/Munsell 7GY3.29/1.5 or customized, etc | |
| Tank material | Mild Steel, 304 Stainless Steel | |
| Insulating Oil Weight | 850 kg | |
| Total Weight | 5000 kg | |
| Outline Dimensions（L×W×H）in. | 2650 × 1650 × 2450（mm) | |
| HV Bushing |
| LV Bushing |
| Tap changer |
| Oil level gauge |
| Oil temperature indicator |
| Pressure relief device |
| Pressure vacuum gauge |
| Lifting hook for complete transformer |
| Name plate |
| Radiators |
| Oil upper filtering valve |
| Oil drain valve with 3/8" sampler |
Customization Optional
2500kVA Oil Immersed Transformer
NPC ELECTRIC's 2500kVA oil-immersed transformers offer a variety of optional specifications to meet the needs of different users. Users can choose different high and low voltage levels to meet the requirements of various power systems. At the same time, the type of oil the transformer can use can be customized according to the environment and application requirements, such as using environmentally friendly transformer oil or mineral oil. Optional cooling methods include natural air cooling and forced air cooling to improve the working efficiency of the transformer.
The transformer's overall size, weight, and wiring method can also be adjusted according to actual needs to adapt to different installation spaces. NPC ELECTRIC is committed to providing customers with flexible solutions to ensure the optimal operation of the transformer in various environments.
Packing and Shipping
2500kVA Oil Immersed Transformer
NPC ELECTRIC's 2500kVA oil-immersed transformers strictly follow international standards during packaging and transportation to ensure that the equipment arrives at the destination safely and intact.
The transformer body is first firmly fixed on a heavy wooden pallet, and shockproof rubber pads are used around it to cushion the vibration and impact during transportation. The outside of the transformer is wrapped with a moisture-proof and rust-proof film to prevent moisture and corrosion, ensuring that the equipment is always in good condition during transportation. All oil valves, bushings and accessories are sealed and leak-proof to prevent oil leakage.
To further ensure the safety of the transformer, the outer packaging uses a sturdy wooden box or steel frame structure, which can effectively resist external collisions and harsh transportation environments. During transportation, the transformer will be transported by flatbed trucks or containers and secured with strong straps to prevent any displacement or damage.
For long-distance transportation, the transformer will be transported by sea or land to ensure timely delivery to the destination. During transportation, the transformer will undergo strict inspection to ensure that there is no damage or non-compliance. After arriving at the destination port or port, the transformer will complete the customs clearance procedures according to local customs clearance requirements and be unloaded by professionals. After unloading, the transformer will be further installed or debugged according to the customer's requirements. All transportation and packaging are carefully designed to ensure that the equipment can be put into use normally after arrival.
NPC ELECTRIC is committed to providing safe and efficient transportation services to ensure that every transformer can be delivered to customers safely and worry-free.
The transformer body is first firmly fixed on a heavy wooden pallet, and shockproof rubber pads are used around it to cushion the vibration and impact during transportation. The outside of the transformer is wrapped with a moisture-proof and rust-proof film to prevent moisture and corrosion, ensuring that the equipment is always in good condition during transportation. All oil valves, bushings and accessories are sealed and leak-proof to prevent oil leakage.
To further ensure the safety of the transformer, the outer packaging uses a sturdy wooden box or steel frame structure, which can effectively resist external collisions and harsh transportation environments. During transportation, the transformer will be transported by flatbed trucks or containers and secured with strong straps to prevent any displacement or damage.
For long-distance transportation, the transformer will be transported by sea or land to ensure timely delivery to the destination. During transportation, the transformer will undergo strict inspection to ensure that there is no damage or non-compliance. After arriving at the destination port or port, the transformer will complete the customs clearance procedures according to local customs clearance requirements and be unloaded by professionals. After unloading, the transformer will be further installed or debugged according to the customer's requirements. All transportation and packaging are carefully designed to ensure that the equipment can be put into use normally after arrival.
NPC ELECTRIC is committed to providing safe and efficient transportation services to ensure that every transformer can be delivered to customers safely and worry-free.
32
32 years of industry experience
Manufacturer Test
2500kVA Oil Immersed Transformer
Progress Test
NPC ELECTRIC's 2500kVA oil-immersed transformers undergo rigorous production testing before leaving the factory to ensure that every technical indicator meets international standards and customer needs. The tests include the transformer's insulation strength, temperature rise test, load loss test, and no-load loss test to ensure its stability and reliability in normal operation. In the electrical performance test of the high and low voltage windings, we strictly check its electrical characteristics to ensure safe use. The oil immersion test monitors the oil quality and oil level of the transformer to ensure the integrity and cooling effect of the oil system. All test results will be recorded and analyzed, and reviewed by professional engineers. In the end, only transformers that pass all tests will be delivered to customers to ensure that they are in optimal operating condition.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Leak Test
♦ DC Insulation Resistance Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Transformer Factory Acceptance Test
NPC ELECTRIC's 2500kVA oil-immersed transformers will undergo rigorous transformer factory acceptance testing (FAT) before leaving the factory.
First, the transformer will undergo a comprehensive high-voltage test to ensure that its insulation performance meets international standards. Next, a load test is carried out to verify its stability and efficiency under rated load. The transformer's temperature rise test will also be performed to ensure its thermal management capabilities under normal operating conditions. All mechanical and electrical connections will be checked to confirm their safety and reliability. In addition, a partial discharge test will be carried out to ensure that the transformer will not have abnormal discharge under high-voltage conditions. The test results will be recorded, and a detailed report will be provided to ensure that the quality of each device meets customer needs.
Through this series of rigorous tests, NPC ELECTRIC ensures that the 2500kVA oil-immersed transformer can work stably and safely in actual operation.
Routine Test - Leak Test
Purpose of Testing
The purpose of water leakage test is to check whether there is leakage in the equipment or system, to ensure that it has good sealing and safety during use. The integrity of the equipment can be verified by simulating the pressure or load conditions in the working environment.
Testing Equipment
Leakage current tester (e.g. Fluke, Hioki, Megger, etc.)
Voltage source (usually 500V, 1 KV or 2.5 KV, customized according to test requirements)
Temperature and humidity meter
Ground electrode
Voltage source (usually 500V, 1 KV or 2.5 KV, customized according to test requirements)
Temperature and humidity meter
Ground electrode
Pre-Test Preparation
Ensure that the test environment conditions are suitable for leak testing. Test between 20°C and 30°C. Relative humidity should be less than 75% to avoid moisture affecting the test equipment and results.
Test Progress
Connect the Test Instrument:
Properly connect the test equipment (such as a leak detector) to the pipe, container or sealing structure of the device under test.
Apply Test Voltage:
Apply the appropriate test pressure (e.g. 10 bar, 15 bar, etc.) depending on the equipment's operating pressure or test standard.
Properly connect the test equipment (such as a leak detector) to the pipe, container or sealing structure of the device under test.
Apply Test Voltage:
Apply the appropriate test pressure (e.g. 10 bar, 15 bar, etc.) depending on the equipment's operating pressure or test standard.
Measure and Record
Start the test and record the following parameters:
Applied test pressure
Leakage (can be monitored by flow meter or other equipment)
Time record (to ensure that the test time meets the standard requirements)
Initial pressure and final pressure (if any changes)
Applied test pressure
Leakage (can be monitored by flow meter or other equipment)
Time record (to ensure that the test time meets the standard requirements)
Initial pressure and final pressure (if any changes)
Check for leaks
Check for leaks on equipment surfaces and joints by using a foam detector, gas leak detector, or other suitable method.
Repeat Testing (if necessary)
If the test finds leakage or there is any doubt, repeat the test as necessary to verify the sealing of different locations or different equipment parts.
Evaluation Criteria (Reference)
No leakage (excellent): No leakage during the test, the equipment is completely sealed.
Minor leakage (good): Very small leakage is allowed, and it is necessary to judge whether it is qualified according to industry standards.
Minor leakage (good): Very small leakage is allowed, and it is necessary to judge whether it is qualified according to industry standards.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Temporary Power Supply Systems, Utilities
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Transformers Packaging (1)
Transformers Packaging (2)
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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