1000kVA Dry Type Transformer
NPC ELECTRIC 1000kVA Dry-Type Transformer offers efficient, oil-free power distribution with a compact design. Equipped with advanced insulation and cooling systems, it ensures safe and reliable operation with minimal maintenance. Ideal for industrial and commercial applications, it provides environmentally friendly and cost-effective performance. Standard features include three-phase configuration, primary voltages 208V–600V (e.g., 480V Delta, 600V Delta), secondary voltages such as 208Y/120V, 480Y/277V, or custom, aluminum or copper windings, 150°C rise (standard) or 115°C/80°C with 220°C insulation class, ±2×2.5% primary taps, NEMA 1 ventilated enclosure (NEMA 3R/encapsulated options), natural convection cooling (AN), electrostatic shielding, and NEMA-compliant low sound levels.
- 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 distribution networks, office buildings
- Power Rating 1000kVA
- 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
1000kVA Dry Type Transformer
Technical Specifications
Accessories
| 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 | |
| Enclosure material | 304 Stainless Steel | |
| Total Weight | 5550 kg | |
| Outline Dimensions（L×W×H）in. | 2000×1680×2450（mm) | |
| HV Bushing |
| LV Bushing |
| Tap changer connector |
| Lifting hook for complete transformer |
| Name plate |
Customization Optional
1000kVA Dry Type Transformer
Our transformers offer a range of core features designed to meet diverse application needs and ensure reliable performance. The 1000kVA Dry-Type Transformer delivers efficient, oil-free power distribution with a durable and compact design. Key features include advanced insulation for increased safety, low noise operation, and minimal maintenance. It is ideal for industrial and commercial applications, offering reliable, environmentally friendly, and cost-effective performance. Winding selections offer aluminum for cost-effective high performance or copper for optimal conductivity, reduced losses, and superior thermal endurance. Temperature rise options provide 150°C (standard), 115°C, or 80°C to enhance efficiency and extend insulation life under high ambient temperatures or sustained heavy loads, utilizing 220°C or advanced class insulation materials. Enclosure configurations encompass ventilated NEMA 1 for indoor dry environments, NEMA 3R with weathershields for outdoor or humid exposure, or fully encapsulated for dust, moisture, corrosive conditions, or hazardous classified areas. K-factor ratings (4, 9, 13, 20+) accommodate nonlinear loads from VFDs, data centers, or advanced equipment, while electrostatic shields minimize transients and common-mode noise.
Further customizations include forced-air fans for overload capacity extension, integrated primary/secondary circuit breakers, surge protection devices, digital temperature/condition sensors with alarms, SCADA integration, low-noise enhancements, seismic bracing (OSHPD-compliant), 50/60Hz dual frequency support, or impedance adjustments for specific coordination needs. All modifications undergo comprehensive engineering review to comply with IEEE, ANSI, NEMA, UL, CSA, and DOE efficiency mandates (2029-amended levels achieving ~99.42% at 35% load for three-phase 1000 kVA), optimizing no-load/load losses, impedance (typically 4-8%), safety features, and total cost of ownership in high-demand or space-constrained applications.
Packing and Shipping
1000kVA Dry Type Transformer
NPC ELECTRIC’s dry-type transformers are meticulously packaged for secure sea freight and long-distance transport, ensuring they arrive at their destination in perfect condition and ready for installation.
The 1000kVA Dry-Type Transformer is carefully packed and shipped to ensure maximum protection and safe delivery to its destination. First, the transformer is securely wrapped in moisture-resistant plastic or shrink film to shield it from dust, dirt, and humidity during transit. It is then mounted onto a sturdy wooden pallet or placed inside a custom-built wooden crate, offering robust support and stability.
The packaging is further reinforced with shock-absorbing materials such as foam padding, rubber supports, or wooden blocks to prevent any damage caused by impact or vibrations. Clear shipping marks are applied to the package, including the transformer’s weight, dimensions, and special handling instructions to ensure correct loading, unloading, and handling.
The transformer is shipped via reliable logistics providers with experience in handling heavy industrial equipment, following international shipping standards.
Upon arrival, the packaging is carefully removed, and the transformer is inspected for any transport-related damage before installation and use.
Domestic shipping utilizes enclosed trailers or flatbeds with secure strapping and blocking to minimize vibration and road shock. International options feature 20ft/40ft containers (palletized, shrink-wrapped), air freight for urgent delivery, or LCL shipments, with certified lashing to resist dynamic forces during sea/air transit. GPS tracking offers real-time shipment visibility; full-value cargo insurance provides comprehensive coverage against risks.
Upon arrival, detailed installation manuals guide safe unloading (via designated lift points), foundation placement with required ventilation clearances, grounding connections, torque specifications for terminations, and pre-energization inspections (megger testing, turns ratio verification). Customs documentation—commercial invoices, packing lists, certificates of origin, efficiency certifications, and test reports—ensures smooth regulatory clearance. Pre-shipment third-party or customer witness inspections can be arranged for verification. Our dedicated logistics coordination guarantees full compliance, reduced transit risks, and delivery of a transformer in optimal condition ready for efficient commissioning.
The 1000kVA Dry-Type Transformer is carefully packed and shipped to ensure maximum protection and safe delivery to its destination. First, the transformer is securely wrapped in moisture-resistant plastic or shrink film to shield it from dust, dirt, and humidity during transit. It is then mounted onto a sturdy wooden pallet or placed inside a custom-built wooden crate, offering robust support and stability.
The packaging is further reinforced with shock-absorbing materials such as foam padding, rubber supports, or wooden blocks to prevent any damage caused by impact or vibrations. Clear shipping marks are applied to the package, including the transformer’s weight, dimensions, and special handling instructions to ensure correct loading, unloading, and handling.
The transformer is shipped via reliable logistics providers with experience in handling heavy industrial equipment, following international shipping standards.
Upon arrival, the packaging is carefully removed, and the transformer is inspected for any transport-related damage before installation and use.
Domestic shipping utilizes enclosed trailers or flatbeds with secure strapping and blocking to minimize vibration and road shock. International options feature 20ft/40ft containers (palletized, shrink-wrapped), air freight for urgent delivery, or LCL shipments, with certified lashing to resist dynamic forces during sea/air transit. GPS tracking offers real-time shipment visibility; full-value cargo insurance provides comprehensive coverage against risks.
Upon arrival, detailed installation manuals guide safe unloading (via designated lift points), foundation placement with required ventilation clearances, grounding connections, torque specifications for terminations, and pre-energization inspections (megger testing, turns ratio verification). Customs documentation—commercial invoices, packing lists, certificates of origin, efficiency certifications, and test reports—ensures smooth regulatory clearance. Pre-shipment third-party or customer witness inspections can be arranged for verification. Our dedicated logistics coordination guarantees full compliance, reduced transit risks, and delivery of a transformer in optimal condition ready for efficient commissioning.
32
32 years of industry experience
Manufacturer Test
1000kVA Dry Type Transformer
Progress Test
NPC Electric manufactures high-quality three-phase dry-type transformers under strict quality control protocols. The 1000kVA Dry-Type Transformer undergoes a comprehensive series of progress tests to ensure it meets the highest quality and performance standards. These tests include verification of voltage ratio, insulation resistance, and load testing under standard operating conditions. The transformer is also tested for temperature rise to ensure efficient heat dissipation and safe operation. Additionally, partial discharge, no-load loss, and short-circuit tests are conducted to verify the transformer’s overall reliability and efficiency. All tests are performed in accordance with international standards, ensuring the transformer delivers optimal performance and long-term durability in real-world applications.
Design Tests
All transformers will be tested after finishing the production, test items as follows:
♦ Insulation Power Factor
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss 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. Induced potential test at double frequency stresses inter-turn insulation with partial discharge monitoring for corona-free operation. No-load loss and excitation current measurement at rated voltage validates core efficiency against DOE 2029 levels (~99.42% at 35% load). Impedance and load loss testing at rated current determines percent Z, copper losses, and regulation characteristics for system coordination. Optional witnessed heat run confirms temperature rise limits under load. Sound level measurement verifies compliance with NEMA standards. Functional operations cycle taps, fans (if equipped), and monitoring/alarm features for proper function. Certified test reports with traceable calibration data and optional customer witnessing document all results, affirming superior efficiency, dielectric robustness, safety, and readiness for reliable field deployment.
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
Optimal for vast institutional campuses, government complexes, and large healthcare networks demanding robust, sustainable power. Additionally supports hyperscale data centers, extensive server infrastructures, EV charging stations, and industrial automation systems needing harmonic tolerance, encapsulated protection in dusty/humid environments, and maximum energy efficiency per DOE 2029 standards with minimal maintenance.
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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