Ukukhuselwa komthwalo ogqithisileyo luphawu kwiinkqubo zombane ezithintela umonakalo okanye ukungaphumeleli ngenxa yokuhamba ngokugqithisileyo kwangoku.Ngokuqhelekileyo isebenza ngokuphazamisa ukuhamba kombane xa udlula umgangatho okhuselekileyo, mhlawumbi ngokuvuthela i-fuse okanye ukukhubeka i-breaker circuit.Oku kunceda ukuthintela ukushisa, umlilo, okanye umonakalo kwizinto ze-elektroniki ezinokubangelwa kukuhamba ngokugqithisileyo.Ukukhuselwa komthwalo ogqithisileyo ngumlinganiselo obalulekileyo wokhuseleko kuyilo lwesixokelelwano sombane kwaye udla ngokufumaneka kwizixhobo ezifana neebhodi zokutshintsha, ii-circuit breakers kunye ne-fuses.
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