Type designation
| MODEL: □SG□ | |
| □ | None: lsolation, Q: Autocoupling |
| S | S: three-phase |
| G | Dry-type transformer |
| □ | Power KVA |
Main technical parameter
| Model | SG-500VA~500KVA | ||||
| Phase | Three phase | ||||
| Input voltage | Default 380V 660V 440V 220V (customizable voltage) | ||||
| Output voltage | Default 220V 1140V 690V 660V 440V 415V 400V 380V 220V 110V (customizable voltage) | ||||
| Voltage Accuracy | ±1% | ||||
| Voltage variation rate | ≤1.5% | ||||
| Efficiency | Inductive (Isolated) ≥99% | ||||
| Resistance to Electricity | 1500V/min | ||||
| Overload capacity | Overloading is not recommended | ||||
| Ambient temperature | -10°C~+ 40°C | ||||
| Waveform Distortion | No additional wave form distortion | ||||
| Cooling method | Dry air-cooled | ||||
| Connection method | D/Y Y/Y customizable | ||||
| Insulating Class | Class F | ||||
| Power | 8KVA | 10KVA | 15KVA | 20KVA | 30KVA |
| Size(mm) L*W*H | 420*330*460 | 460*350*520 | 490*390*520 | 520*430*530 | 520*430*530 |
| Power | 50KVA | 60KVA | 80KVA | 100KVA | 150KVA |
| Size(mm) L*W*H | 750*480*780 | 750*480*780 | 800*500*800 | 800*500*800 | 800*600*800 |
| Power | 200KVA | 250KVA | 300KVA | 400KVA | 500KVA |
| Size(mm) L*W*H | 850*650*850 | 850*650*850 | 850*650*850 | 1200*1000*1200 | 1200*1000*1200 |
| The size and weight vary depending on the voltage range, and are subject to the customized actual product. | |||||
Key Applications
The Three Phase Dry Type Low-Voltage Isolation Transformer is ideal for:
- Industrial automation → CNC machines, production lines, motors, pumps
- Electrical drive control → Inverters, servo systems, variable frequency drives
- Power distribution systems → Low-voltage switchgear, MCC panels, PDU cabinets
- Renewable energy systems → Solar, wind, and battery storage integration
- Sensitive electronics → Data centers, laboratories, medical devices
- Commercial facilities → Malls, airports, stadiums, hospitals, and office buildings
Why Choose Our Dry Type Isolation Transformer?
Compared to conventional transformers, our Three Phase Dry Type Low-Voltage Transformers offer:
- Higher Safety & Reliability
Non-flammable insulation materials
No risk of oil leakage or fire hazards
Better protection against short circuits and overloads
- Better Power Quality
Reduces noise, harmonic distortion, and electromagnetic interference
Provides stable voltage and cleaner power output
- Low Maintenance & Eco-Friendly
No oil replacement required
Environmentally friendly materials and design
Compact, lightweight, and easy to install
Selection Guide
To choose the right Three Phase Dry Type Isolation Transformer, consider:
- Rated Power (kVA) → Select a transformer 20–30% above your maximum load to handle peaks safely.
- Input & Output Voltage → Verify compatibility with your equipment and grid voltage.
- Load Type → For sensitive electronics, choose isolation transformers for better noise suppression.
- Installation Environment → For dusty, humid, or confined areas, dry type transformers are the safest choice.
FAQ
Q1: What is the difference between a dry type transformer and an oil-filled transformer?
A: Dry type transformers use air or epoxy resin insulation and are safer, environmentally friendly, and easier to maintain, while oil-filled transformers require regular oil monitoring and are more suited for outdoor, high-capacity installations.
Q2: Why use an isolation transformer instead of a standard low-voltage transformer?
A: An isolation transformer separates the input and output circuits, providing better protection against voltage spikes, noise interference, and grounding issues, making it ideal for precision equipment and sensitive electronics.
Q3: What is the expected service life of this transformer?
A: With proper installation and maintenance, the Three Phase Dry Type Isolation Transformer can operate reliably for 20–30 years.
