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[kon-tak-ter, kuh n-tak-ter] /ˈkɒn tæk tər, kənˈtæk tər/
noun, Electricity
a mechanically operated switch for continuously establishing and interrupting an electric power circuit.
Origin of contactor
1905-10; contact + -or2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for contactor
  • Auxiliary devices to be installed at each contactor enclosure shall be standard products of manufacturers.
  • The efficiency of the process was demonstrated using a centrifugal contactor for separation of immiscible liquid phases.
  • The ozone contactor off-gas must be recycled or destroyed to minimize exposure to unhealthy ozone levels.
  • Describe the operational process of a rotating biological contactor.
  • Discuss the loading calculation on a rotating biological contactor.
  • The disconnect switch replaces the previously explained fuse cutout and the contactor replaces the primary oil switch.
British Dictionary definitions for contactor


a type of switch for repeatedly opening and closing an electric circuit. Its operation can be mechanical, electromagnetic, or pneumatic
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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