75 kVA Three Phase Autotransformer, 380V to 190V/120V

Q1: What efficiency rating does this 75 kVA three-phase autotransformer achieve?

This dry-type autotransformer delivers ≥98% conversion efficiency, achieved through H-class insulated enameled wire coils with low no-load current, a silicon steel sheet core with low magnetic loss, and tight skip-free winding construction. This high efficiency makes it a cost-effective choice for energy-conscious large-scale industrial and commercial power supply applications.

Q2: Are input and output voltages customizable on this 75 kVA autotransformer?

Yes. While the standard configuration steps down three-phase 380V input to 220V or 200V output on both 50Hz and 60Hz systems, other input and output voltage combinations can be customized. This flexibility makes the 75 kVA three-phase autotransformer adaptable to a wide range of international and specialty power supply requirements.

Q3: How do the separately isolated windings improve the safety of this autotransformer?

Unlike conventional autotransformers, where primary and secondary circuits share a common winding, this 75 kVA unit keeps its primary and secondary windings separately isolated. This isolation reduces the risk of voltage cross-contamination between circuits, providing an enhanced level of electrical safety for connected equipment and operators in demanding industrial environments.