Feixiangda Three-Phase Isolation Transformer is a dry-type isolation transformer, adopting isolation △/Y-shaped connection. It is a double-winding transformer where the input winding and output winding are completely electrically isolated, transferring energy through magnetic coupling. It not only has voltage transformation function, but also can electrically isolate input and output windings safely to avoid the danger of simultaneously touching live parts (or metal parts that may become live due to insulation damage) and places. It can isolate the third harmonic of the power grid to equipment, protect the heat generated by the machine and prevent the reduction of insulation material life, and play a certain role in suppressing various interferences.
This series of transformers features safety and reliability, high efficiency, good isolation effect. The input and output voltage are customizable to meet different application scenario requirements. It can withstand instantaneous overload, can work continuously for a long time, with stable and reliable performance.
Power Range: 1-200KVA
Number of Phases: Three-Phase
Input Voltage: Customizable
Output Voltage: Customizable
Efficiency: ≥95% (Isolation type)
Design Life: 20 Years
The Three-Phase Isolation Transformer works based on the electromagnetic induction principle, adopting isolation △/Y-shaped connection:
| Feature | Description |
|---|---|
| Double-Winding Structure | Adopts double-winding structure, input winding and output winding are completely electrically isolated, transferring energy through magnetic coupling. |
| Electrical Safety Isolation | Input and output are safely electrically isolated, avoiding the danger of simultaneously touching live parts, ensuring personal safety. |
| Isolation △/Y-Shaped Connection | Adopts isolation △/Y-shaped connection, adapting to different load requirements. |
| Customizable Input/Output Voltage | Both input and output voltage can be customized according to customer requirements to meet different application needs. |
| Harmonic Isolation | Can isolate the third harmonic of the power grid to equipment, protecting the heat generated by the machine and preventing the reduction of insulation material life. |
| Interference Suppression | Plays a certain role in suppressing various interferences, ensuring stable equipment operation. |
| Safety and Reliability | High flame retardancy, using high-quality materials and advanced technology, reliable operation, stable performance. |
| High Efficiency | Work efficiency ≥95%, low energy conversion loss. |
| Strong Overload Capacity | Allows more than 1.2 times the load, suitable for impact loads. |
| Long-term Continuous Operation | Design life of 20 years, can operate continuously for a long time, stable and reliable performance. |
| Low Noise | Noise within 50dB/1m, quiet operation. |
| Dry Air Cooling | Adopts dry air cooling method, simple maintenance. |
| Insulation Grade F | Uses Class F insulation material, good heat resistance, safe and reliable. |
| Item | Parameter |
|---|---|
| Product name | Three-Phase Isolation Transformer |
| Work Type | Dry isolation type |
| Wiring | Isolated △/Y-shaped |
| Frequency | 50/60Hz |
| Input voltage | Customizable |
| Output voltage | Customizable |
| Connection | D/d;D/y;Y/y;Y/Y;d;Y/yn |
| Insulation grade | Class F |
| Load test | EN-61558-2-4, JEC-204 |
| Withstand voltage test | AC2500V/min between primary and secondary is normal. No abnormal AC 2500V/min between primary coil and iron core |
| Temperature rise | Under full load continuous operation, the temperature of each winding and core in summer is ≤70℃ |
| Insulation resistance | ≥100MΩ |
| Work efficiency | ≥95% |
| Overload capacity | More than 1.2 times the load is allowed |
| Waveform distortion | No distortion |
| Noise | Within 50dB/1m |
| Temperature | Storage temperature -20~60℃, Working temperature -10~40℃ |
| Humidity | 30-90% no condensing |
| Cooling mode | Dry air cooling |
| Executive standard | GB 19212.14-2012 (EN IEC61558-1) |
| Design life | 20 Years |

| Application | Description |
|---|---|
| PCB Drilling Machine | Provides isolated power for PCB drilling machines, ensuring drilling precision and equipment safety. |
| CNC Equipment | Provides isolated power for CNC machining centers, CNC machine tools, protecting equipment from harmonic interference. |
| Medical Equipment | Provides safe isolated power for medical instruments, ensuring patient and medical staff safety. |
| SMT Equipment | Provides isolated power for SMT pick and place machines, reflow ovens and other equipment, suppressing interference. |
| Printing Machinery | Provides isolated power for printing equipment, ensuring print quality, suppressing harmonic interference. |
| Forming Machine | Provides isolated power for forming equipment, ensuring normal operation. |
| Exposure Machine | Provides isolated power for exposure machines, ensuring exposure effect. |
| Laser Cutting Machine | Provides isolated power for laser cutting equipment, protecting sensitive electronic components. |
| Testing Equipment | Provides stable isolated power for various testing instruments, ensuring accurate experimental data. |
| Imported Mechanical Equipment | Provides voltage conversion and safety isolation for imported equipment. |
| Servo Drive Power Supply | Provides isolated power for servo drives, suppressing interference. |
| Data Center | Provides electrical isolation for critical loads in data centers, ensuring power supply safety. |
| New Energy System | Provides electrical isolation for photovoltaic, energy storage and other new energy systems. |
| Item | Detail |
|---|---|
| Quality System | ISO9001 Quality Management System Certification |
| Product Certification | CE Certified (Compliant with relevant standards) |
| Testing Process | 100% full inspection + 48-hour full-load aging test |
| Warranty | 12 months standard warranty, extendable to 36 months |
| After-sales Service | Lifetime technical support, 7×24 rapid response |
| Advantage | Description |
|---|---|
| Source Factory | Nearly 20 years of power equipment manufacturing experience, own production lines, cost-controlled, guaranteed delivery. |
| Quality Assurance | 100% inspection + 48-hour aging test, ISO9001 certified, product yield rate over 99.7%. |
| Flexible Customization | Supports non-standard customization for capacity, voltage, etc., meeting special requirements. |
| Global Service | 7×24 technical support, 12-month warranty (extendable), lifetime maintenance. |
| Professional Team | Experienced R&D engineers and foreign trade team, providing selection guidance and technical consultation. |
| Technical Accumulation | Nearly 20 years of power equipment manufacturing technical accumulation, mature and reliable products, compliant with international standards. |
Q1: What is the difference between Three-Phase Isolation Transformer and Three-Phase Auto Transformer?
A: Isolation transformer is a double-winding transformer, input and output are completely electrically isolated, with safety isolation function, can isolate third harmonics and suppress interference. Auto transformer is a single-ring type transformer, input and output share part of the winding, small size, light weight, high efficiency, but no electrical isolation function.
Q2: What is the efficiency of this transformer?
A: Work efficiency ≥95%, low energy conversion loss.
Q3: What is the main function of this transformer?
A: The main function is to provide electrical safety isolation while realizing voltage conversion, isolate grid harmonics, suppress interference, and protect equipment and personal safety.
Q4: What protection functions does this transformer have?
A: It has overload protection function, allowing more than 1.2 times the load.
Q5: Can this transformer operate continuously for a long time?
A: Yes. The design life is 20 years, can operate continuously for a long time, stable and reliable performance.
Q6: What scenarios is this transformer suitable for?
A: Suitable for PCB drilling machines, CNC equipment, medical equipment, SMT equipment, printing machinery, forming machines, exposure machines, laser cutting machines, testing equipment, imported mechanical equipment, servo drive power supplies, data centers, new energy systems, etc.
We look forward to becoming your reliable power solution partner!