Engineering category

Power Systems

Transformers, short-circuit fault levels, UPS and power supply calculators for LV and MV electrical systems.

Calculators in this category

Each tool has its own dedicated page.

Dynamic Main LV → DB1–DB5 radial fault network, auto cable R/X lookup, 3φ/2φ limits and breaker ratings (engineering screening).

Three-phase cast-resin or oil-immersed transformer currents, winding quantities, Dyn5/Dyn11 vector groups, impedance and preliminary LV fault level.

UPS power in W and VA, and preliminary battery energy.

Predicted LV voltage at each MV tap, from a measurement.

Annual transformer loss energy and energy cost from the no-load loss P0 and the load loss Pk (estimate).