4 kVA Isolation Transformer Features:
- To step down/up the 3 phase voltage 400V to 208V.
- Primary and secondary windings are separated by aluminium/copper shield.
- Available in the circuit of AC 50Hz/60Hz.
- Better protection, high quality workmanship.
4 kVA Isolation Transformer Specifications
Basics | Model | ATOSG-4KVA |
Phase | 3 phase |
Capacity | 4 kVA |
Weight of Aluminium Wire Transformer | Open type: 50kg Protected type: 65kg |
Weight of Copper Wire Transformer | Open type: 50kg Protected type: 65kg |
Technical Parameters | Primary Voltage | 400V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V) |
Secondary Voltage | 208V (Optional: 120V/ 190V/ 208V/ 220V/ 230V/ 240V/ 380V/ 400V/ 415V/ 480V) |
Frequency | 50Hz / 60 Hz |
Winding Material | Aluminium/Copper wire (Optional) |
Work Efficiency | ≥95% |
Insulation Resistance | ≥50 MΩ |
Electrical Strength | 3000V AC/1 min |
Noise | <35-65dB (1 meter) |
Insulation Grade | H level |
Wiring Mode | Dyn11 |
Cooling Mode | Dry type air cooling |
Overload Capacity | Allow more than 1.2 times rated load to work for up to 4 hours |
Enclosure Protection Grade | IP 24 |
Certificate | CE, ISO |
Warranty | 12 months |
Working Environment | Temperature | -15℃~+40℃ |
Humidity | ≤90%RH, without condensation |
Altitude | <1000m, non corrosive gas and conductive dust |
Note:
Transformer can only convert voltage and CANNOT convert frequency.
Transformer CANNOT convert single phase voltage to 3 phase voltage.
Input/output voltage, power rating and whether with shell of all transformers, can be customized according to clients' requirements.
3 Phase Isolation Transformer Schematic Diagram

3 Phase Isolation Transformer Details

4 kVA Isolation Transformer Installation Dimension

Aluminium Wire Transformer Size | Copper Wire Transformer Size |
Open type: a*b*c=300*155*310mm | Open type: a*b*c=300*155*310mm |
Mouting size: d*e=180*125mm | Mouting size: d*e=180*125mm |
Protected type: A*B*C=300*440*500mm | Protected type: A*B*C=300*440*500mm |
Tips: Characteristics of 4 kVA 3 phase isolation transformer at the AC power output
- Avoid the current distortion of non-linear load to affect the normal operation of AC power and influence to the Grid, it plays a role in purifying the power Grid.
- Take sample at the input end of this three phase 400/230V to 208/120V isolation transformer, so that the distortion of the non-linear load current will not affect the accuracy of the sampling and the control signal that can reflect the actual situation can be obtained.
- If the load is not balanced, it will not affect the normal operation of the stabilized voltage power supply.
Reasonable price 4kVA isolation transformer, convert 3 phase voltage 400V input to 208V output, provides increased reliability and higher efficiency, make this step up/down transformer ideal for a wide range of applications.