It uses a hole-row winding method and vacuum impregnation to ensure insulation to F or H class standards so that performance will meet the advanced level both at home and abroad. QSG/SG series three-phase dry-type isolation transformers are allowed to use in the circuits with AC frequencies of 50Hz to 60Hz and voltage below 2000V, and customizing for specific users can be made.
Type designation
| MODEL: □SG□ | |
| □ | None: lsolation, Q: Autocoupling |
| S | S: three-phase |
| G | Dry-type transformer |
| □ | Power KVA |
Operating Conditions
Altitude: Not Exceeding 2500 meters.
Temperature Range: Ambient temperature ranges from -25°C to +40°C.
Waveform: Current and voltage to be applied shall approximate a sine wave.
Environment: For applications protected from rain, snow, and high vibration or shock.
Explosion Safety: Not intended for use in explosive environments. It is free of corrosive gases or conductive dust that may destroy metals or insulation.
Customization: According to customer requirement, voltages can be customized on both input and output sides.
With high, reliable performance, coupled with adaptability, this transformer is suited for many industrial and commercial uses.
Main technical parameter
Dimensions with housing
| Model NO. | SG |
| Capacity | 500VA 10KVA 15KVA 20KVA 25KVA 30KVA 50KVA 80KVA 100KVA |
| Phase | Three phase |
| Voltage Accuracy | ±1% |
| Voltage variation rate | ≤1.5% |
| Waveform Distortion | No distortion (compared to input waveform) |
| Insulation Grade | Class F,High Temperature Resistance 150° |
| Efficiency | Inductive (Isolated) ≥99% |
| Resistance to Electricity | 2000VA/1min |
| Overload capacity | Allowed to exceed 1.2 times rated load |
| Cooling method | Dry air-cooled |
| Connection method | Y / △ combination |
| Insulation Resistance | ≥150MQ |
| Work Efficiency | Inductive (isolated)>99% |
| Dielectric Strength | 2000VA/1min |
| Design Life | 30 years |
| Noise | ≤35dB (within one meter) |
| Frequency | 50/60Hz |
| Working Environment | Temperature:-20~+45°C Humidity:≤95% RH does not condense |
| Workplace | Non-corrosive gas and conductive dust |
| Safety Standard | Products comply with international national standards such as VDE0550. IEC439JB5555,GB226 |
| Stocking Situation | The 1~300KVA standard models are available in stock, and all specifications are producedin a standardized manner. |
Product specifications
Product analysis
EI type transformer |
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