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substation

[suhb-stey-shuh n] /ˈsʌbˌsteɪ ʃən/
noun
1.
a branch of a main post office.
2.
an auxiliary power station where electrical current is converted, as from AC to DC, voltage is stepped up or down, etc.
Origin
1885-1890
1885-90; sub- + station
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for substation
  • The culprit: a large rodent, identified as a rat in some reports, burned out switches in a campus substation.
  • The cars have to be designed so they can be recharged safely and easily and without taking down the neighborhood power substation.
  • Another possibility: roping together thousands of batteries, planting them at a substation, and storing wind or solar power.
  • He was handcuffed, taken to the airport's police substation, and interrogated.
  • Good hydro facilities in current operation are producing power at a penny or two per kWh at the substation.
  • Now the utility has installed a six-megawatt battery at the substation to deliver electricity to the town during outages.
  • The substation has no transmission lines going to it.
  • There is no joint plan supporting such a substation or the lines that will be needed.
  • The electricity travels along high-voltage lines to a power substation.
  • Each substation and the individual items of equipment contained therein should be periodically inspected.
British Dictionary definitions for substation

substation

/ˈsʌbˌsteɪʃən/
noun
1.
a subsidiary station
2.
an installation at which electricity is received from one or more power stations for conversion from alternating to direct current, reducing the voltage, or switching before distribution by a low-tension network
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for substation
n.

1881, in the policing sense, from sub- + station (n.). Power grid sense is attested from 1901.

Online Etymology Dictionary, © 2010 Douglas Harper
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