Kev Piav Qhia Luv:

Time rolav ie an automatie controlunit whichoon bo oombinod with unrioue othor

olootriononuinmont to ronlivo automatie eontrol eftheunning circuit. Thaum muaj preset

lub sijhawm dhau lawm, qhov tso zis ntawm qhov sib cuag yuav raug kaw lossis qhib. yog li ntawd lub davhlau ya nyob twg hluav taws xob

eguipment tuaj yeem khiav lossis nres tau.

Cov koob ntawm lub sijhawm relay no muaj qhov zoo ntawm kev ua haujlwm dav dav voltage, meej

cov lus qhia ua haujlwm, ntim me me, qhov loj me sib xws, kev teeb tsa yooj yim, thiab lwm yam.