An I-contactor ye-ACiyisakhi sikagesi esinogesi ophansi esisetshenziselwa ukuxhuma nokunqamula njalo amasekethe amakhulu e-AC amabanga amade. Isetshenziswa kabanzi ekulawuleni izimoto, ukusatshalaliswa kwamandla, ukuzenzekela kwezimboni, kanye nokwakha izinhlelo zikagesi. Umsebenzi wayo oyinhloko ukufeza ukulawula kokuqala nokumisa imishini kagesi ngokudonsela oxhumana nabo ngamakhoyili kagesi, futhi inekhono lokusetshenziswa kanye nezinhlelo zokuvikela ukunqwabelana ngokweqile. Ama-contactor e-AC avame ukusetshenziswa kumaphampu amanzi, amafeni, ama-air conditioner, ama-lifti, imishini yokukhiqiza, amakhabethe okuqala izimoto kanye nezinhlelo zokulawula ukukhanya, okungathuthukisa ngempumelelo izinga lokuphepha kanye nokuzenzakalela kokulawula isekethe.

Ezisetshenzisweni ezisebenzayo, ama-contactor e-AC akhethwa ngokusekelwe kumandla awo ajwayelekile, i-voltage yekhoyili, inani lezigxobo kanye nendawo yokusetshenziswa. Isibonelo, imishini emincane yasekhaya noma yezimboni elula ivame ukusebenzisa imininingwane ye-9A kuya ku-32A, kuyilapho imishini emikhulu yasefektri ingasebenzisa ama-contactor anamandla aphezulu anomthamo ongaphezu kuka-65A. Imikhiqizo evamile ifaka phakathi i-Schneider Electric, i-Siemens, i-ABB kanye nomkhiqizo wasekhaya i-Chint, njll.

Ngokuphathelene nentengo, ama-contactor e-AC ahluka kakhulu ngenxa yemininingwane kanye nemikhiqizo: intengo yemakethe yemikhiqizo emincane engu-9A kuya ku-18A ingama-yuan angu-50 kuya ku-150 ngengcezu ngayinye, eyemikhiqizo ephakathi nendawo engu-32A kuya ku-65A ingama-yuan angu-150 kuya ku-500 ngengcezu ngayinye, kanti eyemikhiqizo enamandla amakhulu engu-100A nangaphezulu ivame ukuba ngama-yuan angu-500 kuya ku-2,000 noma ngaphezulu. Imikhiqizo engeniswayo ivame ukubiza kakhulu kuneyasekhaya, kodwa inezinzuzo ezithile mayelana nokuzinza, isikhathi sokuphila kanye nokuthembeka. Ngakho-ke, kumaphrojekthi obunjiniyela, ukukhetha okunengqondo kufanele kwenziwe kuhlanganiswe nomthamo womthwalo, indawo yokusetshenziswa kanye nesabelomali.