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W is for Watts

W is for Watts

W is for Watts

Welcome to a regular feature on the Powertecnique blog. Every Monday we talk you through an A-Z of the terms you hear associated with critical power supplies. In this latest post we’ve reached the letter W. W is for 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. Voltage, Amps, frequency etc. Today we’re looking at a word which falls into this camp; Watts.

Watts measure the power in a circuit. You may remember from way back when in ‘K is for kVA’ that we discussed that kVA measures apparent power within a ci?rcuit whereas Watts measures real power.

In many ways real power is easier to understand than apparent power. Real power is the electricity drawn on a circuit by the devices which are being powered. 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. Simple. 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’).

To give a flavour of what Watts are; one watt of electricity implies that one joule of energy is being used every second (see ‘J is for Joule’).

Hopefully this has given you a bit more of an idea as to what Watts are. If there’s a topic you’d like covered in our A-Z why not get in touch via twitter. Our handle is @powertecnique.

Author: Owen McIntyre

10/02/2014 16:35:00
Listed in : A-Z of Critical Power  

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