وحدات توزيع الطاقة

Distribution is where a well-designed power system is most often undone. A rack fed from a single PDU gives every dual-supply server in it a single point of failure, and equipment plugged across two PDUs that both trace back to the same upstream breaker has the appearance of redundancy without any of the substance.

Measurement is the other half. Without metering at circuit or outlet level, a facility's remaining capacity is a guess, and the usual result is either stranded capacity nobody dares use or a breaker discovered at its limit by tripping. Metered PDUs turn that into a number.

Switched units add remote control of individual outlets, which matters more than it sounds: it is the difference between power-cycling a hung device from a desk and sending somebody to a room at three in the morning to pull a plug.