 Re: Contactors : and how they work
Hi Luke,
the only winding a contactor has is the coil ,this is fed with a set voltage via the control circuit,most coils are marked with the opperating voltage and can be ac or dc,24volt ,110 volt ,240 volt ,or 415 volt, upon completion of the control circuit the coil is energised and operates as a solinoid and attracts an armature which makes the conection between the contacts, most contactors have three main contacts for the phases and various auxillary contacts for the control circuit ,these can be normally open or normally closed ,for motor control the contactor is often "held in"by taking the coil feed via a n/o contact, hope this helps a bit ,its difficult to explain in words and i cant upload a picture at present
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