1000kVA Oil Immersed Transformer
NPC ELECTRIC's 1000kVA oil-immersed transformer is made of high-quality silicon steel sheets and high-quality insulation materials, with high efficiency, low loss, and long life. The product complies with international standards such as IEC 60076 and GB 1094, and has passed strict type tests and factory tests to ensure safety and reliability.
- 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 ISO, CE, IEC, IEEE, ANSI
- Application Power Grids, Industrial Parks, Commercial Buildings And New Energy Projects
- Power Rating 1000kVA
- 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
1000kVA Oil Immersed Transformer
Technical Specifications
Accessories
| Technical Specifications | ||
| Rated Power | 1000 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 | 700 kg | |
| Total Weight | 3750 kg | |
| Outline Dimensions（L×W×H）in. | 2500 × 1500 × 2300（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
1000kVA Oil Immersed Transformer
NPC ELECTRIC's 1000kVA oil-immersed transformers offer a variety of optional specifications to meet the needs of different users. Users can choose different rated voltages, including customization of high-voltage and low-voltage side voltages, to ensure adaptation to various power systems. The insulation level of the transformer can provide a variety of options upon request to meet the use requirements in different environments. In order to improve the service life and reliability of the transformer, corrosion-resistant casing and seismic design are provided, suitable for use in harsh environments and high-vibration areas.
According to customer needs, the cooling method of the transformer can be selected from natural cooling or forced oil circulation cooling to provide better heat dissipation. Users can also choose a monitoring system, including temperature monitoring, oil level monitoring, and other functions, to ensure real-time monitoring of the equipment's operating status. All options of this transformer comply with international IEC and ANSI standards to ensure product quality and safety performance.
Packing and Shipping
1000kVA Oil Immersed Transformer
NPC ELECTRIC's 1000kVA oil-immersed transformers will undergo a careful packaging and transportation process after leaving the factory to ensure that they arrive safely at their destination and meet customer requirements. To ensure that the equipment is not damaged during transportation, the packaging solution combines international standards and strict quality control.
First, the transformer body will be fixed on a sturdy wooden pallet with sufficient load-bearing capacity to ensure that the equipment is stable during transportation. In order to prevent vibration during transportation, shock-absorbing materials will be used between the transformer and the pallet to ensure that the equipment is not affected by external vibrations. Then, the entire transformer will be wrapped in a moisture-proof and rust-proof protective film, which helps prevent oxidation and corrosion in a humid environment. All tank interfaces and valves will be tightly sealed to prevent oil leakage or contamination. All accessories of the transformer, including bushings, terminals, etc., will be individually packed in reinforced wooden boxes for transportation and avoid damage. Clear operating instructions, center of gravity markings and lifting positions will be marked on the external packaging box to ensure safety during transportation and loading and unloading.
In terms of transportation methods, for domestic transportation, the transformer will be transported by flatbed trucks, and the goods will be secured with high-strength straps to prevent movement during driving. For international transportation, the transformer is usually transported by container (for smaller units) or as bulk cargo (for larger units) by sea or rail. During transportation, the transformer will always remain upright and avoid tilting or inverting.
Finally, after strict packaging and transportation, NPC ELECTRIC's 1000kVA oil-immersed transformer will be delivered to the customer safely and intact, ensuring its normal operation and meeting the customer's usage needs.
First, the transformer body will be fixed on a sturdy wooden pallet with sufficient load-bearing capacity to ensure that the equipment is stable during transportation. In order to prevent vibration during transportation, shock-absorbing materials will be used between the transformer and the pallet to ensure that the equipment is not affected by external vibrations. Then, the entire transformer will be wrapped in a moisture-proof and rust-proof protective film, which helps prevent oxidation and corrosion in a humid environment. All tank interfaces and valves will be tightly sealed to prevent oil leakage or contamination. All accessories of the transformer, including bushings, terminals, etc., will be individually packed in reinforced wooden boxes for transportation and avoid damage. Clear operating instructions, center of gravity markings and lifting positions will be marked on the external packaging box to ensure safety during transportation and loading and unloading.
In terms of transportation methods, for domestic transportation, the transformer will be transported by flatbed trucks, and the goods will be secured with high-strength straps to prevent movement during driving. For international transportation, the transformer is usually transported by container (for smaller units) or as bulk cargo (for larger units) by sea or rail. During transportation, the transformer will always remain upright and avoid tilting or inverting.
Finally, after strict packaging and transportation, NPC ELECTRIC's 1000kVA oil-immersed transformer will be delivered to the customer safely and intact, ensuring its normal operation and meeting the customer's usage needs.
32
32 years of industry experience
Manufacturer Test
1000kVA Oil Immersed Transformer
Progress Test
During the manufacturing process, NPC ELECTRIC's 1000kVA oil-immersed transformers are fully tested in strict accordance with international standards. First, the raw materials of the transformer will undergo strict quality inspection to ensure that all components meet the technical requirements. Next, after manufacturing, the transformer will undergo an airtightness test to ensure that the oil tank is leak-free and meets the sealing standards. Then, load tests and short-circuit tests are carried out to verify the stability and performance of the transformer under different working loads. Subsequently, a temperature rise test is carried out to ensure that the temperature of the transformer is controlled within a safe range during long-term operation. Finally, after the test is completed, all test reports will be recorded in detail and delivered to the customer to ensure that the quality and safety of the product meet the standard requirements.
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
Before NPC ELECTRIC's 1000kVA oil-immersed transformers leave the factory, they will undergo a rigorous transformer factory acceptance test (FAT) to ensure that their performance meets customer needs and international standards.
This process includes comprehensive testing of all aspects of the transformer, from electrical performance to mechanical structure, to ensure the stability and reliability of the equipment. First, the transformer will undergo a no-load test to check its current and voltage stability when it is running without a load. Next, a load test will be carried out to simulate the working state under different load conditions to verify its performance in actual applications. Then, a short-circuit test will be carried out to test the transformer's pressure resistance under short-circuit conditions to ensure its safety.
After the test, all test results and reports will be provided to the customer and approved by the customer to ensure that the transformer meets all technical requirements and safety regulations.
Routine Test - DC Insulation Resistance Test
Purpose of Testing
The purpose of DC insulation resistance testing is to measure the insulation resistance of a device by applying a DC voltage, thereby evaluating the health of the insulation material and the voltage withstand capability of the electrical device. This test helps detect potential insulation aging, moisture or damage, preventing electrical failures in the device.
Testing Equipment
Insulation resistance tester (e.g. Megger, Fluke, Hioki, Klein Tools, etc.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Voltage source (usually 500V, 1000V, 2500V, or customized according to customer requirements)
Temperature and humidity meter (used to record the ambient temperature and humidity during the test to ensure that the test conditions meet the standard requirements.)
Pre-Test Preparation
Make sure the device is properly grounded and fully discharged to prevent residual charge in the device from affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Perform the test under suitable environmental conditions. It is recommended to have a relative humidity below 75%, no rain, and a temperature range of 20-30°C to avoid moisture or temperature fluctuations affecting the test results.
Test Progress
Connect the Test Instrument:
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Connect an insulation resistance tester to the high voltage terminal of the device under test and to ground.
Apply Test Voltage:
Select an appropriate test voltage based on the rated voltage of the equipment .
Measure and Record
Start the test and record the following parameters:
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Insulation resistance value (MΩ)
Applied voltage
Ambient temperature and humidity during testing
Temperature Correction
The measured insulation resistance values are corrected to a reference temperature (usually 20°C) for accurate evaluation.
Repeat Testing (if necessary)
Measure different windings (high voltage, medium voltage, low voltage) or each bushing separately, and conduct comparative analysis to ensure the insulation status of all parts.
Evaluation Criteria (Reference)
Insulation resistance ≥ 1000 MΩ (excellent)
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
500 MΩ ≤ Insulation resistance < 1000 MΩ (good)
100 MΩ ≤ Insulation resistance < 500 MΩ
Insulation resistance < 100 MΩ
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Power Grids, Industrial Parks, Commercial Buildings And New Energy Projects
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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NPC ELECTRIC's 1600kVA oil-immersed transformer adopts internationally advanced technology and complies with international standards such as IEC and ANSI to ensure stable and reliable product performance. This transformer is widely used in the fields of power, industry, and infrastructure, with excellent load capacity and long life. Its efficient oil-immersed cooling system effectively improves the thermal management of the transformer and ensures long-term and efficient operation.FAQ From Customers
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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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