A relay mudziyo we otomatiki wekudzora unobuda nekukasira kana iyo yekuisa (yemagetsi, magineti, acoustic, optical, kana thermal) yasvika pane imwe kukosha.
Kana imwe voltage kana yazvino ikaiswa pane coil ye electromagnetic relay, iyo magineti flux inogadzirwa necoil inopfuura nepamagineti inoumbwa nesimbi core, joko, armature, uye kushanda kwemhepo gap. Pasi pesimba remagineti, iyo armature inokwezvwa kune danda kumeso kwesimbi musimboti, nekudaro ichisundidzira anowanzo kuvharika macontacts kuti avhure uye anowanzo kuvhura macontact kuvhara. Kana iyo voltage kana yazvino pacoil iri pasi pehumwe kukosha, iyo mechanical reaction simba yakakura kudarika yemagetsi ekukwezva simba, armature inodzokera kune yayo yekutanga mamiriro, anowanzo kuvhurika mabatiro akavhurika, uye anowanzo kuvharwa mabikirwo anovhara.
Nokudaro, relay yemotokari inogona kuonekwa segungano rinosanganisira dunhu rekutonga rinoshanda nekoiri uye guru guru rinoshanda nevanosangana. Mune relay's control circuit, chete diki inoshanda ikozvino iripo. Izvi zvinodaro nekuti iyo yekubatanidza kugona kweiyo inoshanda switch idiki uye haigone kushandiswa kudzora zvakananga mitoro ine hombe yemagetsi zvinodiwa; yayo on/off mamiriro anogona chete kudzorwa kuburikidza relay contacts.
A relay zvese zviri zviviri switch yekudzora uye chinhu chinodzorwa (actuator). Tichitora pombi yemafuta semuenzaniso, ndiyo chinja chekudzora pombi yemafuta. Nekudaro, iyo coil yepombi yepombi relay inogona kungogadzira dunhu kuburikidza nenzvimbo yekugadzika yemagetsi control unit apo inotyaira transistor mumagetsi control unit inovhurwa.
