(1) Kev xaiv zoo. Raws li ntev raws li qhov ntsuas tam sim no ntawm fuse txuas ntawm sab sauv thiab qis fuses ua tau raws li qhov yuav tsum tau ua ntawm kev xaiv overcurrent piv ntawm 1.6: 1 teev los ntawm lub teb chaws tus qauv thiab tus qauv IEC, uas yog, qhov ntsuas tam sim no ntawm lub fuse txuas sab saud yog tsis tsawg tshaj li 1.6 npaug ntawm tus nqi ntawm qib qis, nws suav tias yog lub zog siab thiab qis zog. Selective cut-off ntawm txhaum tam sim no.
(2) Cov yam ntxwv zoo tam sim no txwv thiab muaj peev xwm tawg siab.
(3) Qhov loj me me.
(4) Tus nqi pheej yig dua.
