Biến áp

How a buck-boost transformer works: series-winding polarity, differential kVA sizing with single-phase and three-phase examples, and the five limits that decide when it is the wrong tool.

How to size a step-up transformer for a motor: locked-rotor current, kVA code letters, starting kVA by method, voltage-dip and thermal-duty checks, plus the traps most guides miss.

A practical dry-type vs oil-immersed transformer comparison for low-voltage buyers: cooling class, fire safety, overload, maintenance and installed cost, plus a ten-minute selection sequence.

What medical-grade really requires for a 100 VA–5 kVA isolation transformer: IEC 60601-1 limits, 2×MOPP dielectric tests, leakage current budgets and the documents to demand from a supplier.

A spec-by-industry guide to transformer applications in power distribution, industrial, medical and renewable projects: which function, kVA rating, duty cycle and enclosure each vertical actually needs.

Learn how to read a transformer nameplate: decode the kVA rating, voltage and taps, frequency, impedance, insulation class and temperature rise before you install or replace a unit.

A practical classification of transformer types by function, construction, cooling and application, plus a selection path for buyers.

The real causes of transformer blowout, how to tell an internal fault from a downstream one, and realistic repair versus replacement downtime.

Compare copper vs aluminum transformer windings on conductivity, cost, weight, size, losses and termination reliability, with the numbers behind each trade-off.