20 kVA Three Phase Isolation Transformer, 380V to 190V, Step Up/Down

Note:

1. The transformer can only convert voltage, and CANNOT convert frequency.
2. The transformer CANNOT convert 1-phase voltage to 3-phase voltage.
3. Input/output voltage, power rating, and whether a shell for all transformers can be customized to meet clients' requirements.

Q1. How does the aluminium/copper winding shield differ from standard isolation at 20 kVA?

At 20 kVA, the transformer's larger physical size means greater winding surface area and consequently greater inter-winding capacitance, which increases the amount of high-frequency noise that can couple through from primary to secondary compared with smaller units. The aluminium/copper electrostatic shield inserted between windings provides a low-impedance path to ground for this capacitively coupled interference, effectively blocking it from reaching the secondary circuit. For sensitive downstream loads — such as VFD-driven equipment, CNC controllers, precision instrumentation, or communication systems — this shielded construction provides meaningfully cleaner secondary power than an equivalent unshielded isolation transformer of the same rating.

Q2. Is this transformer suitable for use in oil and gas or petrochemical facilities?

Yes. The non-ventilated (TENV) enclosure design is a key qualification for use in oil, gas & petrochemical environments, where the presence of flammable gases, hydrocarbon vapours, or combustible dust makes open or ventilated electrical equipment a potential ignition source. The sealed enclosure prevents these substances from contacting the transformer's internal components. It is also suited for offshore platforms, chemical processing plants, and refineries where both explosive atmosphere risk and corrosive ambient conditions require fully enclosed electrical equipment.