Circuit breakers, protection relays and busbars form the operating core of an electrical distribution system. The breaker interrupts current, the relay decides when interruption is necessary, and the busbar carries…
El dimensionamiento de transformadores es más que dividir la carga total por un porcentaje. Una selección fiable convierte la carga real en kVA, aplica demanda y diversidad, comprueba los motores y los armónicos, tiene en cuenta el entorno y el futuro…
High voltage allows electric power to move long distances with lower current and lower conductor losses, but it also increases insulation, clearance, protection and safety requirements. This guide explains what voltage…
Un interruptor automático en miniatura, más formalmente conocido como interruptor termomagnético en miniatura (MCB), protege los circuitos finales de baja tensión contra sobrecargas y cortocircuitos. Se puede rearmar después de corregir la avería, pero debe seleccionarse para…
An electrical distribution system transfers power from a utility connection or generator through substations, transformers, switchgear, panels and cables to the final loads. Good design delivers acceptable voltage,…
A step-up transformer raises alternating voltage from the primary side to the secondary side. For approximately the same apparent power, the higher-voltage side carries lower current. Step-up units connect generators…
Converting kVA to amps is one of the most common calculations in transformer, generator, cable and switchgear selection. The arithmetic is simple, but the result is only correct when the phase arrangement and voltage…
A power factor correction capacitor supplies reactive power close to an inductive load, reducing the reactive current drawn from the utility. Correctly applied, a capacitor bank can lower current, release transformer…
What is a substation? An electrical substation is a controlled point in a power system where electricity is transformed, switched, protected, measured, and routed. It connects generation and transmission networks to…
A transformer changes alternating voltage through electromagnetic induction. If a transformer raises the voltage, it will reduce the current for approximately the same transferred apparent power, excluding losses.…