2500kVA Dry Type Transformer
The NPC ELECTRIC 2500kVA Dry Type Transformer is a high-capacity, reliable power solution designed for large industrial and commercial applications. With a power rating of 2500kVA, it features advanced dry-type insulation technology, offering superior safety, low maintenance, and long-term performance. Engineered to operate efficiently in demanding environments, this transformer delivers stable, noise-free power while minimizing environmental impact.
- 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 Dry type transformer
- BIL 30/95kV
- Standards IEEE, ANSI, NEMA,IEC,GB
- Application Industrial equipment power distribution, commercial buildings, residential power distribution, power systems and distribution networks etc
- Power Rating 2500kVA
- Certificate UL ,CESI
- Cooling Method OA/OF
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
2500kVA Dry Type 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 | |
| Enclosure material | 304 Stainless Steel | |
| Total Weight | 25000 kg | |
| Outline Dimensions（L×W×H）in. | 3800×2200×2980（mm) | |
| HV Bushing |
| LV Bushing |
| Tap changer connector |
| Lifting hook for complete transformer |
| Name plate |
Customization Optional
2500kVA Dry Type Transformer
The 2500kVA Dry-Type Transformer from NPC Electric offers high-performance power distribution with advanced solid insulation technology, eliminating the need for oil and enhancing safety. Its efficient design ensures minimal energy losses and excellent heat dissipation, making it ideal for industrial and commercial applications. The transformer is built for durability and reliability, capable of withstanding demanding environments. Its compact footprint and low maintenance requirements ensure long-term, cost-effective operation while minimizing environmental impact.
Packing and Shipping
2500kVA Dry Type Transformer
The Packing and Shipping process for the NPC Electric 2500kVA Dry-Type Transformer is designed to ensure the safe and secure transportation of the transformer from the manufacturing facility to its final destination. After the transformer undergoes a thorough quality inspection and testing process, it is carefully cleaned to remove any dust, debris, or contaminants that might have accumulated during manufacturing. The packing process begins by securing the transformer in a durable and protective wooden crate or metal frame, which is custom-built to fit the transformer’s dimensions and provide robust protection during transit. The crate or frame is equipped with internal cushioning materials, such as foam or rubber pads, to absorb shocks and vibrations, protecting sensitive components like bushings, terminals, and the insulation system from potential damage.
To prevent moisture, dust, or environmental contaminants from affecting the transformer during transport, it is wrapped in weather-resistant plastic or shrink-wrapped. Additionally, the transformer is securely fastened inside the crate to prevent any movement that could result in physical damage. The outer packaging is clearly labeled with important information such as the model number, weight, handling instructions, and any relevant safety warnings, ensuring proper handling throughout the shipping process.
All required shipping documentation is included, such as customs clearance forms, inspection certificates, and safety compliance certificates, especially for international shipments, to facilitate smooth customs processing and compliance with regulations. The transformer is carefully handled during loading and unloading, using specialized lifting equipment such as cranes or forklifts to avoid any impact that could damage the transformer. It is then transported by road, sea, or rail, depending on the final destination and transport requirements.
Once the transformer arrives at its destination, it undergoes a final inspection to ensure it has not been damaged during the shipping process. After passing this inspection, the transformer is ready for installation and use. The packing and shipping process ensures that the NPC Electric 2500kVA Dry-Type Transformer reaches its destination safely and is ready for reliable, efficient operation upon installation.
To prevent moisture, dust, or environmental contaminants from affecting the transformer during transport, it is wrapped in weather-resistant plastic or shrink-wrapped. Additionally, the transformer is securely fastened inside the crate to prevent any movement that could result in physical damage. The outer packaging is clearly labeled with important information such as the model number, weight, handling instructions, and any relevant safety warnings, ensuring proper handling throughout the shipping process.
All required shipping documentation is included, such as customs clearance forms, inspection certificates, and safety compliance certificates, especially for international shipments, to facilitate smooth customs processing and compliance with regulations. The transformer is carefully handled during loading and unloading, using specialized lifting equipment such as cranes or forklifts to avoid any impact that could damage the transformer. It is then transported by road, sea, or rail, depending on the final destination and transport requirements.
Once the transformer arrives at its destination, it undergoes a final inspection to ensure it has not been damaged during the shipping process. After passing this inspection, the transformer is ready for installation and use. The packing and shipping process ensures that the NPC Electric 2500kVA Dry-Type Transformer reaches its destination safely and is ready for reliable, efficient operation upon installation.
32
32 years of industry experience
Manufacturer Test
2500kVA Dry Type Transformer
Progress Test
NPC Electric manufactures high-quality three-phase dry-type transformers under strict quality control protocols. The Progress Test for the NPC Electric 2500kVA Dry-Type Transformer includes several essential tests to ensure the transformer meets safety and performance standards. It begins with an insulation resistance test to check the integrity of the insulation system. A winding resistance test follows to detect any issues in the primary and secondary windings. The dielectric withstand test is performed to confirm the transformer can handle overvoltage conditions safely. The temperature rise test monitors the transformer’s performance under full load to ensure it operates within safe temperature limits. A load test evaluates its voltage regulation and efficiency across various loads. The short-circuit impedance test checks the transformer’s ability to handle fault conditions, while a noise level test ensures it operates quietly within acceptable limits. Lastly, a mechanical integrity test is conducted to ensure all components are securely assembled. Upon successful completion, a test report is generated to certify the transformer’s readiness for use.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ 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)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
Transformer Factory Acceptance Test
NPC Electric conducts rigorous quality control testing on every transformer or representative samples, as well as on specific components and materials, to ensure compliance with design specifications throughout the production process.
The Factory Acceptance Test (FAT) for a 2500kVA three-phase dry-type transformer is a critical step performed before shipment to verify that the unit meets all applicable standards and delivers optimal performance. The FAT includes the following key procedures:
Visual Inspection: Evaluates the transformer’s physical condition, including the enclosure, terminals, and labeling, to ensure conformance with design and safety requirements.
Electrical Testing: Involves measuring winding resistance, insulation resistance, and performing turns ratio tests to validate electrical integrity and functionality.
Dielectric Strength Test: Applies high voltage across the insulation system to ensure it can endure both normal and transient operating voltages without failure.
Load Testing: Simulates real-world operating conditions to assess the transformer’s voltage regulation, temperature rise, and overall efficiency under load.
Protection Device Testing: Verifies the proper operation of integrated protective components such as thermal sensors, temperature relays, and tap changers (if applicable).
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)
nsulation 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
Test standard
IEEE C57.12.01 & IEEE C57.12.91 (Dry-Type)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Industrial equipment power distribution, commercial buildings, residential power distribution, power systems and distribution networks etc
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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