Electric multiple unit

<p>An electric multiple unit or EMU is a <a href="/facts/Multiple-unit/lu1AD7C7">multiple-unit</a> <a href="/facts/Train/0mkFQDg9">train</a> consisting of self-propelled carriages using <a href="/facts/Electricity/hNC8D65W">electricity</a> as the motive power. An EMU requires no separate <a href="/facts/Locomotive/C9YV7wrQ">locomotive</a>, as electric <a href="/facts/Traction_motor/5xAX9sdk">traction motors</a> are incorporated within one or a number of the carriages. An EMU is usually formed of two or more semi-permanently coupled carriages. However, electrically powered single-unit <a href="/facts/Railcar/8WCtLGNc">railcars</a> are also generally classed as EMUs. The vast majority of EMUs are passenger trains but versions also exist for carrying mail.
</p><p>EMUs are popular on intercity, commuter, and suburban rail networks around the world due to their fast acceleration and pollution-free operation, and are used on most rapid-transit systems. Being quieter than <a href="/facts/Diesel_multiple_unit/3p9Vt1Ez">diesel multiple units</a> (DMUs) and <a href="/facts/Locomotive/C9YV7wrQ">locomotive</a>-hauled trains, EMUs can operate later at night and more frequently without disturbing nearby residents. In addition, tunnel design for EMU trains is simpler as no provision is needed for exhausting fumes, although retrofitting existing limited-clearance tunnels to accommodate the extra equipment needed to transmit electric power to the train can be difficult.
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Electric multiple unit open-in-new

Electric multiple unit