(1) Nrog nce ntawm load, qhov tam sim no voltage theem siv nyob rau hauv tej thaj chaw ntawm Suav teb tau txwv kev ywj pheej, thiab nws yog ib qhov tsim nyog yuav tau txais ib theem tshiab voltage theem. Qhov kev siv ntawm qhov kev ntsuas hluav taws xob yuav tsum muaj kev tshawb hauv qhov kev paub ua raws li qhov tshwj xeeb ntawm lub nroog.
(2) Rau cov cheeb tsam uas muaj qhov siab tshaj qhov kawg, xav txog kev hloov maj mam hloov mus rau qhov nruab nrab ntawm qhov nruab nrab qhov hluav taws xob. Rau cov cheeb tsam uas muaj qis kawg ntawm qhov ceev ntim thiab ntev zog ntawm qhov chaw, qhov nruab nrab ntawm qhov nruab nrab voltage tis voltages tej zaum kuj yuav raug xam tias.
(3) Yuav kom tsis txhob cuam tshuam qhov kev ntseeg ntawm lub hwj huam khoom thaum lub sijhawm qhia txog cov qib tshiab voltage, nws yog ib qho ua tau los mus nruab sob sib txawv ntawm cov qauv hluav taws xob ntau ntau los ntawm daim phiaj sib txuas.
(4) Rau cov cheeb tsam uas tab tom txais ib theem tshiab qhov sib npaug, qhov kev coj ua zoo tshaj plaws rau hauv kev ua lag luam muaj peev xwm yuav coj los siv, thiab tom qab ob peb xyoos ntawm kev hloov maj mam, muaj ib qhov qauv ntawm qhov sib npaug ntawm qib siab.