A contactor is an electrically controlled switch used for switching a power circuit, similar to a relay except with higher current ratings. A contactor is controlled by a circuit which has a much lower power level than the switched circuit. Contactors come in many forms with varying capacities and features. Unlike a circuit breaker, a contactor is...
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http://en.wikipedia.org/wiki/Contactor
The device used to switch main power to a drive. In the case of a three phase drive it is usually important that the drive controls the contactor - i.e. that emergency stop sequencing cannot interrupt the contactor coil supply.
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http://www.encyclo.co.uk/local/20823
a mechanically operated switch for continuously establishing and interrupting an electric power circuit.
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https://www.infoplease.com/dictionary/contactor
No exact match found.
