11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Discover our premium 11/0.4kV 630kVA Oil-Immersed Power Transformer, engineered for superior high-efficiency distribution in modern electrical grids. This robust transformer features advanced silicon steel cores that minimize energy losses, ensuring up to 98% efficiency under full load. Ideal for urban and rural power networks, it incorporates eco-friendly insulating oil with high dielectric strength, providing reliable voltage step-down from 11kV to 0.4kV while handling demanding loads up to 630kVA. Built with corrosion-resistant tanks and precision-wound copper coils, this distribution transformer guarantees long-term durability, reduced maintenance, and compliance with international standards like IEC 60076. Whether for residential complexes, commercial facilities, or industrial applications, it optimizes power delivery, lowers operational costs, and supports sustainable energy practices. Experience unmatched performance with this high-efficiency oil-immersed transformer designed for seamless integration into your power system.
- Primary Voltage Ratings 35kV, 46kV or others
- Secondary Voltage Ratings 11/0.4kV or others
- H.V. Tap Range ±8×1.25% or others
- Type Oil-immersed power transformer
- BIL 11/0.4kV
- Standards IEEE, ANSI, NEMA, IEC, CE
- Application mining operations, oil & gas facilities
- Power Rating 630kVA
- Certificate UL, CESI, IEEE
- Cooling Method ONAN/ONAF
- Oil Mineral Oil or FR3
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Technical Specifications
Accessories
| Rated Power | 630kVA | |
| Rating Primary Voltage | 11/0.4kV | |
| Secondary Voltage |
6.6kV 10kV 13.8kV 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 | |
| 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
11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Our 11/0.4kV 630kVA Oil-Immersed Power Transformer offers extensive customization to meet diverse electrical needs, enhancing its adaptability for specific high-efficiency distribution applications. Clients can select from various winding materials, such as high-grade aluminum or copper, to optimize conductivity and reduce heat generation, ensuring peak performance in varying load conditions. Voltage ratios can be tailored beyond the standard 11/0.4kV, including options like 10.5/0.415kV for regional grid compatibility, while capacity adjustments up to 800kVA allow scalability for growing power demands. Additional features include integrated tap changers for on-load voltage regulation, advanced cooling systems like forced air or enhanced radiators for better thermal management, and smart monitoring sensors for real-time diagnostics via IoT integration. Enclosure types range from standard outdoor tanks to fully sealed indoor units with IP65 protection against dust and moisture, promoting longevity in harsh environments. Color coding, branding, and accessory additions like surge arresters or grounding kits further personalize the unit, aligning with safety standards and user preferences to deliver a bespoke high-efficiency distribution transformer solution.
For specialized sectors, customization extends to eco-conscious options such as biodegradable insulating oils that minimize environmental impact without compromising dielectric properties. Noise reduction packages with vibration-dampening mounts and soundproof enclosures are available for urban installations near residential areas, ensuring compliance with noise regulations. Impedance levels can be fine-tuned from 4% to 6% to match network stability requirements, while vector group configurations like Dyn11 or Yyn0 provide flexibility for parallel operations. Overload capabilities can be enhanced for short-term peaks, ideal for renewable energy integrations like solar farms. With these tailored features, our oil-immersed power transformer not only boosts efficiency but also integrates seamlessly into custom power infrastructures, supporting SEO-optimized searches for "customizable high-efficiency distribution transformers" by emphasizing user-centric design and reliability.
Packing and Shipping
11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Secure packaging is paramount for our 11/0.4kV 630kVA Oil-Immersed Power Transformer to ensure it arrives in pristine condition, ready for high-efficiency distribution deployment. Each unit is first encased in robust wooden crates reinforced with steel bands, providing superior protection against impacts during transit. Internal foam padding and moisture-absorbent materials safeguard the transformer's sensitive components, such as coils and oil tanks, from vibrations and humidity fluctuations. Custom-fitted shock indicators are attached to monitor handling, allowing for immediate inspection upon delivery. This meticulous packing process complies with international shipping standards like ISPM 15 for wooden materials, preventing pest issues and facilitating smooth customs clearance for global exports.
Shipping options are tailored to client needs, offering flexible modes for efficient delivery of this high-efficiency distribution transformer. For domestic shipments, we utilize trusted road freight partners with GPS-tracked vehicles, ensuring timely arrival within 7-14 days depending on location. International orders leverage sea or air freight; containerized ocean shipping in 20ft or 40ft units protects against saltwater exposure, with transit times averaging 20-45 days to major ports worldwide. Air cargo is available for urgent requirements, delivering in 3-7 days but at a premium cost.
Documentation and compliance are integral to our packing and shipping protocol, enhancing SEO visibility for "secure power transformer logistics." Each package comes with detailed manifests, certificates of origin, and test reports to expedite customs processes. We adhere to hazardous material regulations for oil-filled units, using UN-approved labeling and spill-proof seals. Eco-friendly practices include recyclable packing materials where possible, aligning with sustainable shipping trends. Tracking portals allow real-time updates via email or app, keeping clients informed from warehouse dispatch to site delivery, thus optimizing the end-to-end experience for high-efficiency distribution equipment.
Post-shipment support ensures seamless integration of the 11/0.4kV 630kVA transformer upon arrival. Our team provides unpacking guidelines and optional on-site assistance for installation, minimizing downtime. Return policies cover manufacturing defects within 30 days, with reverse logistics arranged at no extra cost. For bulk orders, consolidated shipping reduces expenses and carbon footprint, appealing to environmentally conscious buyers.
Shipping options are tailored to client needs, offering flexible modes for efficient delivery of this high-efficiency distribution transformer. For domestic shipments, we utilize trusted road freight partners with GPS-tracked vehicles, ensuring timely arrival within 7-14 days depending on location. International orders leverage sea or air freight; containerized ocean shipping in 20ft or 40ft units protects against saltwater exposure, with transit times averaging 20-45 days to major ports worldwide. Air cargo is available for urgent requirements, delivering in 3-7 days but at a premium cost.
Documentation and compliance are integral to our packing and shipping protocol, enhancing SEO visibility for "secure power transformer logistics." Each package comes with detailed manifests, certificates of origin, and test reports to expedite customs processes. We adhere to hazardous material regulations for oil-filled units, using UN-approved labeling and spill-proof seals. Eco-friendly practices include recyclable packing materials where possible, aligning with sustainable shipping trends. Tracking portals allow real-time updates via email or app, keeping clients informed from warehouse dispatch to site delivery, thus optimizing the end-to-end experience for high-efficiency distribution equipment.
Post-shipment support ensures seamless integration of the 11/0.4kV 630kVA transformer upon arrival. Our team provides unpacking guidelines and optional on-site assistance for installation, minimizing downtime. Return policies cover manufacturing defects within 30 days, with reverse logistics arranged at no extra cost. For bulk orders, consolidated shipping reduces expenses and carbon footprint, appealing to environmentally conscious buyers.
32
32 years of industry experience
Manufacturer Test
11/0.4kV 630kVA Oil-Immersed Power Transformer Distribution Type
Progress Test
Advanced progress testing for this high-efficiency distribution transformer includes tap changer functionality verification, ensuring smooth voltage adjustments without arcing through cycle tests exceeding 10,000 operations. Cooling system efficacy is evaluated by monitoring radiator flow rates and temperature gradients during simulated overloads up to 120% capacity. Final assembly vibration analysis uses accelerometers to confirm structural stability below 5mm/s, preventing operational noise. Environmental stress tests expose the unit to humidity cycles (95% RH) and thermal shocks (-20°C to 80°C) to validate durability. Comprehensive data logging supports traceability, enhancing appeal in searches for "progressive oil-immersed transformer quality assurance," ensuring the 630kVA model meets high-efficiency benchmarks before shipment.
Design Tests
All transformer will be test after finished the production, test items as follows:
♦ 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
Factory Acceptance Tests (FAT) for the 11/0.4kV 630kVA Oil-Immersed Power Transformer commence with ratio and polarity checks using calibrated voltmeters to confirm accurate voltage transformation and phase alignment. No-load and load loss measurements are conducted at rated frequency, verifying efficiency exceeds 98% with precision wattmeters. Insulation resistance is tested at 5kV DC, ensuring values over 1GΩ for safety in high-efficiency distribution. Short-circuit impedance is evaluated to match specified 5%, using impedance bridges for network compatibility. These tests, witnessed by clients, incorporate SEO-relevant documentation like "high-efficiency transformer FAT protocols," guaranteeing compliance with IEC standards.
Routine Test - Induced Voltage
Purpose of Testing
The purpose of the Induced Voltage test is to simulate the electrical stress that the equipment may encounter under actual working conditions by applying an induced voltage, thereby evaluating the tolerance and stability of the equipment's insulation system. This test helps to detect the insulation performance of the equipment under high voltage conditions and ensure its safety and reliability in operation.
Testing Equipment
Induced Voltage Tester (e.g. OMICRON, Megger, HioKI, etc.)
AC voltage source, commonly 2 kV, 5 kV, 10 kV, or customized according to test requirements.
Environmental thermometer and hygrometer, used to record the temperature and humidity of the environment for appropriate test evaluation.
AC voltage source, commonly 2 kV, 5 kV, 10 kV, or customized according to test requirements.
Environmental thermometer and hygrometer, used to record the temperature and humidity of the environment for appropriate test evaluation.
Pre-Test Preparation
Disconnect all relevant power supplies and ensure that the equipment is properly grounded and discharged.
Check the connection wires and terminals to ensure they are secure and free of contamination.
Test under suitable environmental conditions: relative humidity below 75%, no rain (recommended temperature: 20-30°C).
Check the connection wires and terminals to ensure they are secure and free of contamination.
Test under suitable environmental conditions: relative humidity below 75%, no rain (recommended temperature: 20-30°C).
Test Progress
Connect the Test Instrument:
Connect the test equipment to the appropriate terminals or bushings of the device under test, ensuring that the connections are secure and properly grounded.
Apply Test Voltage:
Select the appropriate induction voltage according to the rated voltage and standard of the equipment.
Connect the test equipment to the appropriate terminals or bushings of the device under test, ensuring that the connections are secure and properly grounded.
Apply Test Voltage:
Select the appropriate induction voltage according to the rated voltage and standard of the equipment.
Measure and Record
Start the test and record the following parameters:
Induced Voltage
Applied Current
Voltage peak, stability and waveform (waveform analysis)
Any abnormal current or voltage changes during the measurement process.
Induced Voltage
Applied Current
Voltage peak, stability and waveform (waveform analysis)
Any abnormal current or voltage changes during the measurement process.
Temperature Correction
The measured induced voltage data is corrected to the reference temperature (usually 20°C) to ensure the accuracy of the test results.
Repeat Testing (if necessary)
If necessary, test different windings (HV, MV, LV) and bushings separately and compare the results at different test points.
Evaluation Criteria (Reference)
Inductive voltage ≤ 1% (Excellent): normally and meets safety standards.
1% < Inductive voltage ≤ 3% (Good): still within acceptable range.
Inductive voltage > 3% : faulty or not meet safety requirements and requires further analysis and repair.
1% < Inductive voltage ≤ 3% (Good): still within acceptable range.
Inductive voltage > 3% : faulty or not meet safety requirements and requires further analysis and repair.
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Suited for industrial parks, it supports heavy machinery loads with stable voltage, enhancing productivity in manufacturing and renewable energy farms.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
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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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