1500kVA Oil Immersed Transformer
NPC ELECTRIC's 1500kVA oil-immersed transformer adopts advanced technology, complies with international IEC, ANSI, and other standards, and has efficient and stable power conversion capabilities. It uses oil-immersed cooling technology, has excellent heat dissipation performance and durability, and ensures long-term stable operation of the equipment in harsh environments.
- 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, UL
- Application Industrial and Power Sectors
- Power Rating 1500kVA
- Certificate UL, CESI, CE
- 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
1500kVA Oil Immersed Transformer
Technical Specifications
Accessories
| Technical Specifications | ||
| Rated Power | 1500 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 | 780 kg | |
| Total Weight | 4300 kg | |
| Outline Dimensions（L×W×H）in. | 2550 × 1600 × 2400（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
1500kVA Oil Immersed Transformer
NPC ELECTRIC's 1500kVA oil-immersed transformers offer a variety of optional configurations to meet the needs of different users. Users can choose different oil types, including conventional mineral oil or environmentally friendly bio-oil, to adapt to specific environmental requirements. The rated voltage and current of the transformer can be customized according to specific needs to ensure compatibility with the power system. To improve operating efficiency, the transformer can be equipped with an automatic voltage regulator to achieve a more stable voltage output. In addition, users can also choose to install a temperature monitoring system to monitor the operating temperature of the transformer in real time to avoid overheating.
The protection level of the transformer can be selected according to the use environment, providing higher dust and water protection. Finally, the transformer can also be equipped with an intelligent remote monitoring system, which allows users to monitor and remotely control the status of the equipment in real time.
Packing and Shipping
1500kVA Oil Immersed Transformer
NPC ELECTRIC's 1500kVA oil-immersed transformers are packed and transported with strict safety measures to ensure that the equipment arrives at the destination safely and intact.
First, the transformer body is fixed on a sturdy wooden pallet to ensure stability during transportation. Then, the key parts of the transformer, such as bushings and oil pillows, are wrapped with shock-proof rubber pads to reduce the impact of vibration on the equipment. The transformer oil is sealed to ensure that there will be no leakage during transportation, and the oil tank part is strictly protected from moisture.
The external packaging is a wooden box or steel frame, which can effectively prevent damage from external forces during transportation. According to the import requirements of the destination country, all necessary export documents, certificates of origin, and compliance certificates will be included with the goods. In terms of transportation methods, sea, rail, or road transportation is selected according to customer needs and destination to ensure safety during transportation.
During the transportation of the transformer, all loading and unloading, and transportation strictly follow professional operating specifications to avoid any unnecessary risks. After arriving at the destination, the transformer will be cleared by customs and handed over to the designated consignee for unloading and installation. All unloading instructions are accompanied by detailed diagrams to ensure that the equipment is installed correctly. In order to ensure the long-term stable operation of the equipment, the transportation process of the transformer is strictly controlled, and professional technical support is provided throughout the process.
Through this series of packaging and transportation processes, NPC ELECTRIC's 1500kVA oil-immersed transformer can reach customers safely and quickly, ensuring that there is no worry during use.
First, the transformer body is fixed on a sturdy wooden pallet to ensure stability during transportation. Then, the key parts of the transformer, such as bushings and oil pillows, are wrapped with shock-proof rubber pads to reduce the impact of vibration on the equipment. The transformer oil is sealed to ensure that there will be no leakage during transportation, and the oil tank part is strictly protected from moisture.
The external packaging is a wooden box or steel frame, which can effectively prevent damage from external forces during transportation. According to the import requirements of the destination country, all necessary export documents, certificates of origin, and compliance certificates will be included with the goods. In terms of transportation methods, sea, rail, or road transportation is selected according to customer needs and destination to ensure safety during transportation.
During the transportation of the transformer, all loading and unloading, and transportation strictly follow professional operating specifications to avoid any unnecessary risks. After arriving at the destination, the transformer will be cleared by customs and handed over to the designated consignee for unloading and installation. All unloading instructions are accompanied by detailed diagrams to ensure that the equipment is installed correctly. In order to ensure the long-term stable operation of the equipment, the transportation process of the transformer is strictly controlled, and professional technical support is provided throughout the process.
Through this series of packaging and transportation processes, NPC ELECTRIC's 1500kVA oil-immersed transformer can reach customers safely and quickly, ensuring that there is no worry during use.
32
32 years of industry experience
Manufacturer Test
1500kVA Oil Immersed Transformer
Progress Test
NPC ELECTRIC's 1500kVA oil-immersed transformers are produced with various progress tests strictly in accordance with international standards. First, we conduct a preliminary inspection of the various components of the transformer to ensure that all parts meet the design requirements. Next, we conduct insulation performance tests to ensure that the oil-immersed transformer can operate normally under high-voltage conditions. After that, we conduct temperature rise tests to verify whether the transformer can maintain a safe temperature range when operating at full load. Next, we test short-circuit impedance and load tests to ensure that the electrical performance of the transformer meets the expected standards. All test results meet the design specifications and are recorded as the basis for final quality acceptance. Finally, after rigorous inspection and testing, NPC ELECTRIC's 1500kVA oil-immersed transformers are ready for delivery, ensuring their reliability and efficiency at the customer's site.
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 1500kVA oil-immersed transformers undergo a rigorous transformer factory acceptance test (FAT) before leaving the factory. First, all the transformer's electrical parameters, including rated voltage, rated current, and frequency, will be fully tested under special test equipment to ensure that they meet the design requirements. Then, the transformer's insulation performance is tested to confirm that it can withstand the insulation strength at the rated voltage to avoid any electrical faults. In addition, a load test will be carried out to ensure that the transformer can work stably in actual operation without overheating or abnormal current fluctuations. The transformer's oil-immersed system will also be inspected for sealing and oil quality to ensure the cleanliness and safety of the oil. At the same time, vibration tests and noise tests will also be carried out to ensure that the equipment runs smoothly without abnormal noise. Finally, after all tests are passed, a detailed test report will be issued to confirm that the transformer's various performance indicators meet national and international standards.
This factory acceptance test lays a solid foundation for ensuring the high quality and safety of the transformer when it is delivered.
Routine Test - Transformer Turns Ratio/TTR (All Tap Voltages)
Purpose of Testing
The purpose of the transformer turns ratio (TTR) test is to confirm whether the voltage ratio between each tap of the transformer meets the design requirements and ensure that the transformer winding is connected correctly. By measuring the voltage ratio of each tap, it is possible to detect whether there is a fault or deviation in the transformer winding.
Testing Equipment
TTR tester: such as Doble, Megger, Omicron and other brands of transformer winding ratio tester.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Voltage source: usually AC 10 V to 30 V , used to test different voltages for each tap.
Temperature and humidity meter: used to record environmental conditions during the test to ensure test accuracy.
Current probe: used to measure the load current of the winding and ensure the accuracy of the test results.
Pre-Test Preparation
Disconnect all transformer tap-changers from the power supply and ensure that all equipment is properly grounded and discharged.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Test Progress
Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20-30°C). Avoid high humidity or bad weather that may affect the test accuracy.
Measure and Record
Start the test and record the following parameters:
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
The voltage ratio between the windings
Deviation of the measured value from the rated ratio
Temperature Correction
If necessary, perform temperature correction on the measured turns ratio data (especially when testing at higher or lower temperatures). Generally, the standard reference temperature for temperature correction is 20°C.
Repeat Testing (if necessary)
Test the transformer's windings of different voltage levels (high voltage, medium voltage, and low voltage) separately to ensure that the turns ratios of all windings are normal.
Evaluation Criteria (Reference)
Turns ratio error ≤ 0.5% (pass)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
0.5% < Turns ratio error ≤ 1% (caution)
Turns ratio error > 1% (further inspection or corrective action required)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Industrial and Power Sectors
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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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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