Umthelela:
Ishubhu ye-fuse engashintshi kanye nentambo yomthofu yangaphandle.Lapho i-fuse ixhunywe kumjikelezo, ukuncibilika kuxhunywe ochungechungeni kumjikelezo, futhi umthamo wamanje ugeleza ngokuncibilika.Uma isifunda esifushane noma i-overcurrent yenzeka kumjikelezo, i-current ngokusebenzisa i-melting yenza ukushisa;lapho ifinyelela izinga lokushisa elincibilikayo lensimbi encibilikisiwe, izozihlanganisa ngokwayo, futhi isifunda sephutha sizonqunywa kanye nenqubo yokucisha i-arc kanye ne-arc yokucisha ukuze idlale indima yokuvikela.