10kV Cast Resin Dry Type Transformer Copper Winding
The 10kV Cast Resin Dry Type Transformer Copper Winding, a high-reliability, oil-free power solution engineered for safe and efficient indoor medium-voltage distribution. This three-phase dry-type transformer features fully vacuum-cast epoxy resin encapsulation around high-purity copper windings, combined with premium low-loss grain-oriented silicon steel cores to deliver exceptional energy efficiency (typically 98%+), significantly reduced no-load and load losses, and outstanding partial discharge performance (<10pC). The cast resin design ensures superior moisture resistance, self-extinguishing fire safety (F1 class), robust short-circuit withstand, and maintenance-free operation. Natural air (AN) cooling with optional forced air (AF) upgrades supports high overload capacity while maintaining low acoustic emissions through advanced vibration isolation and optimized core/winding geometry. Compliant with IEC 60076-11 and equivalent standards, this transformer steps down 10kV primary (with ±2×2.5% or wider off-circuit taps) to 0.4kV secondary (Dyn11 vector group standard), making it the ideal choice for modern commercial, industrial, and utility indoor installations prioritizing safety, sustainability, and long-term performance.
- Primary Voltage Ratings 10 kV (10000 V) delta or grounded wye
- Secondary Voltage Ratings 0.4 kV (400/230 V) wye
- 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 hospitals, data centers, educational institutions
- Power Rating 50kVA - 7500kVA
- Certificate IEC 60076-11, IEC 60076-1, IEC 60076-3, UL 1561
- Cooling Method OA/OF
- Opeartion Step Down & Step Up
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
10kV Cast Resin Dry Type Transformer Copper Winding
Technical Specifications
Accessories
| Rated Power | 50kVA-7500 kVA | |
| Rating Primary Voltage | 10kV | |
| 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 | |
|
Cooling |
Natural air (AN); forced air (AF) optional for overload |
|
|
Insulation system |
Class F (155°C) or Class H (180°C) rise |
|
| HV Bushing |
| LV Bushing |
| Tap changer connector |
| Lifting hook for complete transformer |
| Name plate |
Customization Optional
10kV Cast Resin Dry Type Transformer Copper Winding
The 10kV Cast Resin Dry Type Transformer Copper Winding supports comprehensive customization to perfectly fit diverse indoor project requirements and environmental conditions. Primary voltage remains standard at 10kV (with 10.5kV or 11kV variants available), while secondary voltages include 0.4kV, 0.69kV, or custom low-voltage outputs. Copper windings are standard for maximum conductivity and thermal performance; aluminum options are offered for weight and cost optimization. Tap changers range from off-circuit ±2×2.5% to ±10% for basic adjustment, or advanced on-load tap changers (OLTC) for automatic voltage regulation in variable-load networks. Insulation class upgrades to Class H (180°C) accommodate higher ambient temperatures or overload profiles, while partial discharge can be restricted below 5pC for ultra-sensitive applications. Cooling enhancements include forced air (AF) fans for 40-50% capacity increase during peaks, with enclosure protection from IP00 open type to IP54/IP55 dust/water-resistant designs featuring filters or louvers.
Additional personalization covers vector groups (Dyn11 standard, Yyn0 or custom) for harmonic mitigation and parallel operation compatibility, integrated temperature monitoring with PT100 sensors and digital alarm/trip relays, anti-vibration isolators reducing noise below 55-60dB, electrostatic shielding for EMI-sensitive loads, and smart monitoring packages with Modbus/Ethernet interfaces for IoT predictive maintenance. Special resin formulations enhance fire behavior or chemical resistance, while seismic bracing, marine-grade coatings, and oversized terminals support high-current or custom installations. These factory-tailored options ensure optimal performance and adaptability, boosting search visibility for "custom 10kV copper winding cast resin dry type transformers."
Packing and Shipping
10kV Cast Resin Dry Type Transformer Copper Winding
Packaging the 10kV Cast Resin Dry Type Transformer Copper Winding prioritizes complete protection of the vacuum-cast windings and core during handling and transit. The unit is securely mounted on a reinforced wooden pallet with anti-vibration rubber pads, corner braces, and lifting lugs for safe crane or forklift operations. Exposed terminals, bushings, and sensors receive individual foam inserts and rigid protective covers, while the entire assembly is wrapped in multi-layer moisture-proof film and breathable sheeting. A heavy-duty, ISPM 15-compliant wooden crate fully encases the transformer, reinforced with internal supports, desiccant bags, humidity indicator cards, and electronic shock/tilt recorders to verify careful handling and maintain dry-type condition.
Shipping is optimized for secure, flexible delivery worldwide. Ocean freight in 20ft or 40ft containers provides cost-effective international transport with secure blocking and bracing, typically arriving in 20-50 days depending on destination. Air freight accelerates urgent shipments in 5-12 days. Domestic and regional trucking utilizes enclosed trailers with weatherproof tarping and secure tie-downs, complying with road regulations. Full-value cargo insurance protects against transit risks throughout the journey.
All shipments include complete export documentation: commercial invoices, packing lists, certificates of origin, test reports, and IEC compliance declarations to expedite customs clearance. Environmentally responsible practices incorporate recyclable crate materials and optimized routing to minimize carbon footprint. Clients receive real-time GPS tracking with milestone alerts and dedicated logistics coordinator support.
Post-arrival services offer optional supervised unpacking, final insulation resistance verification, and responsible packaging disposal/recycling to accelerate commissioning. For multiple-unit orders, consolidated loading and phased delivery scheduling reduce site disruption. This professional packing and shipping process guarantees your 10kV copper winding dry type transformer arrives in perfect condition, enhancing SEO performance for "secure cast resin dry type transformer logistics."
Shipping is optimized for secure, flexible delivery worldwide. Ocean freight in 20ft or 40ft containers provides cost-effective international transport with secure blocking and bracing, typically arriving in 20-50 days depending on destination. Air freight accelerates urgent shipments in 5-12 days. Domestic and regional trucking utilizes enclosed trailers with weatherproof tarping and secure tie-downs, complying with road regulations. Full-value cargo insurance protects against transit risks throughout the journey.
All shipments include complete export documentation: commercial invoices, packing lists, certificates of origin, test reports, and IEC compliance declarations to expedite customs clearance. Environmentally responsible practices incorporate recyclable crate materials and optimized routing to minimize carbon footprint. Clients receive real-time GPS tracking with milestone alerts and dedicated logistics coordinator support.
Post-arrival services offer optional supervised unpacking, final insulation resistance verification, and responsible packaging disposal/recycling to accelerate commissioning. For multiple-unit orders, consolidated loading and phased delivery scheduling reduce site disruption. This professional packing and shipping process guarantees your 10kV copper winding dry type transformer arrives in perfect condition, enhancing SEO performance for "secure cast resin dry type transformer logistics."
32
32 years of industry experience
Manufacturer Test
10kV Cast Resin Dry Type Transformer Copper Winding
Progress Test
Initial manufacturing stages for the 10kV cast resin dry type transformer copper winding include core material validation through Epstein frame testing of grain-oriented silicon steel to confirm ultra-low specific losses and flux uniformity. Copper winding production employs precision automated layering with real-time inter-turn high-potential surge testing for insulation consistency and defect elimination. Pre-casting conductor positioning is verified via laser metrology for accurate duct and spacer alignment. Vacuum pressure impregnation cycles are monitored with resin flow sensors and ultrasonic void detection. Core-coil preliminary assembly features low-voltage excitation for magnetization curve, harmonic content, and magnetic balance profiling. These systematic checks, supported by digital serialization and traceability, establish a strong foundation for energy-efficient and reliable operation. Advanced progress evaluations feature resin casting with multi-zone temperature-controlled curing, post-cure hardness testing, and thermal expansion verification. Partial discharge pre-screening during incremental voltage application confirms levels well below acceptance thresholds. Air duct airflow and resistance are validated through pressure drop and flow visualization tests.
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
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
Transformer Factory Acceptance Test
Factory Acceptance Testing for the 10kV cast resin dry type transformer copper winding begins with high-accuracy ratio and polarity verification across all taps using dual-reference ratiometric instrumentation, achieving results within 0.15%. No-load loss, excitation current, and harmonic spectra are exhaustively measured at 90–110% rated voltage to confirm superior core efficiency and compliance with energy standards. Advanced acceptance testing incorporates double-frequency induced overvoltage with highly sensitive partial discharge, RIV, and acoustic emission monitoring, maintaining discharge well below 10pC across the entire voltage envelope. Temperature rise testing at rated and overload conditions employs distributed fiber-optic sensors to verify hotspot temperatures remain within Class F/H limits. Regulation, impedance, and full-load loss are precisely quantified using calibrated short-circuit methods. Operational cycling of tap changers (if fitted) and accessory functionality (relays, fans) is demonstrated extensively. Acoustic performance is characterized via sound intensity mapping in a hemi-anechoic environment, confirming low-noise compliance.
Routine Test - On load Loss Test
Purpose of Testing
The purpose of On-load Loss Test is to measure the active power loss of the transformer under rated voltage and rated load, evaluate its energy efficiency level and design compliance, and provide a basis for energy consumption calculation and performance optimization during operation.
Testing Equipment
Power transformer test system (e.g. OMICRON, ISA, Tettex, Vanguard, etc.)
Voltage source and current source (usually rated voltage, or adjusted according to the test standard, such as 10 KV, 20 KV, 35 KV, etc.)
Temperature and humidity meter (used to record ambient temperature and humidity for correction of test data)
Voltage source and current source (usually rated voltage, or adjusted according to the test standard, such as 10 KV, 20 KV, 35 KV, etc.)
Temperature and humidity meter (used to record ambient temperature and humidity for correction of test data)
Pre-Test Preparation
Disconnect the transformer high voltage, low voltage and neutral power supply to ensure that the equipment is properly grounded and safely discharged.
The test environment should be dry and rainless, with a relative humidity of less than 75% and a recommended temperature range of 20–30°C.
The test environment should be dry and rainless, with a relative humidity of less than 75% and a recommended temperature range of 20–30°C.
Test Progress
Connect the Test Instrument:
Connect the test equipment to the appropriate terminals of the device under test and ensure that all wiring is correct and the device is well grounded.
Apply Test Voltage:
Apply the specified test voltage at the rated frequency and adjust the low voltage side to maintain the rated current (or specified current).
Connect the test equipment to the appropriate terminals of the device under test and ensure that all wiring is correct and the device is well grounded.
Apply Test Voltage:
Apply the specified test voltage at the rated frequency and adjust the low voltage side to maintain the rated current (or specified current).
Measure and Record
Start the test and record the following parameters:
On-Load Loss Power
Input Power and Output Power
Current
Voltage
Temperature (temperature rise or winding temperature)
Ambient temperature and humidity during the test
On-Load Loss Power
Input Power and Output Power
Current
Voltage
Temperature (temperature rise or winding temperature)
Ambient temperature and humidity during the test
Temperature Correction
The measured loss data is corrected based on a reference temperature (usually 20°C) to ensure the accuracy of the results.
Repeat Testing (if necessary)
Test different tap positions (Tap Changer) and record and compare the load loss data of each tap point.
Evaluation Criteria (Reference)
Evaluate the test results based on the equipment type and manufacturer requirements. If the load losses are low and the efficiency is high, it is considered "normal".
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
Extensively deployed in mixed-use urban developments, light industrial facilities, and indoor substations, offering energy-efficient, fire-safe power distribution for integrated commercial, institutional, and small manufacturing operations.
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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