Cheap 50 kVA isolation transformer is available in the circuit of AC 50Hz/ 60Hz, it can step down 3 phase voltage 480V to 400V, step up 400V to 480V transformer is available, suitable for indoor applications.

50 kVA Isolation Transformer Specifications

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

50 kVA Isolation Transformer Installation Dimension

Tips: How the noise of 3 phase isolation transformer is caused

Specifically, there are three noise sources in the 3 phase isolation transformer including iron core, winding and cooler, which is the noise of no-load, load and cooling system. The reason of the iron core noise is that under the action of the iron core silicon steel sheet alternating magnetic field, slight change which is magnetostriction occurs. Magnetostriction causes the iron core to periodically vibrate with changes of the excitation frequency, which is caused by magnetostrictive deformation of the iron core, windings, oil tank and electromagnetic force within the magnetic shield. The reason for the vibration of the winding is that electromagnetic force is generated in the current winding, the leakage magnetic field can also make the structure vibrate.

The reason of the electromagnetic noise is that the magnetic field induces the vibration of the iron core lamination along the longitudinal direction to generate noise, the vibration amplitude is related to the magnetic flux density of the core lamination and the magnetic properties of the iron core material, it has little relation with the load current. The electromagnetic force (and vibration amplitude) is proportional to the square of the current, and the emitted sound power is proportional to the square of the vibration amplitude.