Electrical systems transformers · Transformers in Electrical systems
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Transformers in Electrical systems
Transformers in Electrical systems
They have two different types: "step-up" and "step-down". Step-up transformers allow you to plug a higher-voltage device into a lower-voltage power socket (such as using a UK device in the US). Step-down transformers allow you to plug a lower-voltage device into a higher-voltage socket (such as using a US device in the UK). Some transformers offer both. Take care to use the right type: if you plugged a 110-to-220 V step-up transformer into a 220 V socket, you would get 440 V and a fried device.
You must also make sure that the power rating (wattage) of your transformer is at least 10% greater than that of the device; otherwise, the transformer can overheat and even catch fire. Before buying a transformer, look for the "input" figure: usually on the device's plug or in the manual. Some don't display wattage, but you can work it out simply by multiplying the voltage (V) and the current (amps (A); if it is miliamps (mA), divide by 1,000). The resulting figure is the same as the wattage.
Transformers can be used with both electronic devices (such as those with chips and circuits) or electrical appliances (such as those with heating elements and motors). They can usually operate for a much longer time than converters.
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Electrical systems Travel Guide from Wikitravel. Many thanks to all Wikitravel contributors. Text is available under Creative Commons Attribution-ShareAlike 3.0, images are available under various licenses, see each image for details.