STC-D AC Contactor ndi gawo lamagetsi lomwe limagwiritsidwa ntchito kuwongolera patali ndi kuyatsa kapena kuzimitsa pafupipafupi mabwalo a AC. Amagwiritsidwa ntchito kwambiri potsegula ndi kuwongolera mabwalo mumagetsi amagetsi amagetsi komanso kuwongolera kutali kwa ma motors, kuyatsa ndi katundu wina wamagetsi mu automation yamakampani.Alternating Current (AC) Contactor, i.e. STC-D AC Contactor, ndi chida chofunikira kwambiri chowongolera magetsi, chomwe chimagwira ntchito yosasinthika m'munda wamagetsi amagetsi ndi makina opanga mafakitale.
St Str2-D13 Chiyanjano ndikugwiritsa ntchito masiku ano potentha ndi mafuta, kotero kuti pali ma counts olumikiza, kuti akwaniritse madera owongolera, kuti mukwaniritse zoteteza mota. Monga chinthu choteteza kwambiri cha mota, st st2-d13 kuwonjezeka kwa mafuta ali ndi maubwino ang'ono kukula, kapangidwe kosavuta komanso mtengo wotsika.