Your UPS would need to be sized higher than this though due to the inefficiencies of circuits and the nature of apparent power (see ‘K is for kVA’). So if you’re computer uses 300w and you have that plugged into a circuit with a printer which is using 150 Watts of power, then the real power on the circuit is 450 Watts. Real power is the electricity drawn on a circuit by the devices which are being powered. In many ways real power is easier to understand than apparent power. You may remember from way back when in ‘K is for kVA’ that we discussed that kVA measures apparent power within a circuit whereas Watts measures real power. Today we’re looking at a word which falls into this camp Watts. There are some terms that you hear again and again when it comes to electricity because they are part & parcel of the language of power. In this latest post we’ve reached the letter W. Every Monday we talk you through an A-Z of the terms you hear associated with critical power supplies. Welcome to a regular feature on the Powertecnique blog.
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