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The International Electrotechnical Commission (IEC) publishes a web microsite World Plugs [1] which provides the main source for this page, except where other sources are indicated. World Plugs includes some history, a description of plug types, and a list of countries giving the type(s) used and the mains voltage and frequency.
In the German-speaking countries, high-voltage electrification began at 16 + 2 ⁄ 3 hertz, exactly one third of the national power grid frequency of 50 Hz. This facilitated the operation of rotary converters from the grid frequency and allowed dedicated railway power generators to operate at the same shaft speed as a standard 50 Hz generator ...
Railway electrification is the development of powering trains and locomotives using electricity instead of diesel or steam power.The history of railway electrification dates back to the late 19th century when the first electric tramways were introduced in cities like Berlin, London, and New York City.
Afterwards, in the 1920s, the main lines starting from Paris and lines in the Pyrenees were electrified with 1,500 V DC. After World War II and with the improvements in power electronics, tests were made with 20 kV AC and subsequently with 25 kV AC in the Alps, which was considered satisfactory. Then the North and the East of France were ...
The output will usually be DC in the range 1.5–24 V. Power supplies that output either 100–120 V AC or 210–240 V AC are available; they are called inverters, due to the conversion from DC to AC rather than the voltage change. The output frequency and waveform of an inverter may not accurately replicate that supplied by mains electricity ...
A passive electric power adapter, sometimes called a travel plug or travel adapter, allows using a plug from one region with a foreign socket. As other countries supply 120-volt, 60 Hz AC, using a travel adapter in a country with a different supply poses a safety hazard if the connected device does not support both input voltages.
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From left: IEC Type 1/SAE J1772 inlet; Tesla NACS outlet; IEC Type 2 connector outlet IEC 62196 Plugs, socket-outlets, vehicle connectors and vehicle inlets – Conductive charging of electric vehicles is a series of international standards that define requirements and tests for plugs, socket-outlets, vehicle connectors and vehicle inlets for conductive charging of electric vehicles and is ...