Tus qauv tseem ceeb rau kev lees paub hauv North America yog UL Underwriters Laboratory tus qauv. UL ncaj qha muab ntawv pov thawj cov khoom, teeb meem daim ntawv pov thawj thiab siv cov ntawv pov thawj. CSA nyob rau hauv Canada belongs rau North American system, thiab nws cov ntawv pov thawj thiab cov qauv zoo ib yam li UL. UL thiab CSA kuj tseem tuaj yeem lees paub lwm hom fuses los ntawm kev cim lawv txawv.
UL Label siv rau kev lees paub los ntawm UL tus qauv ntawm lub koom haum
Cov ntawv pov thawj uas tsis yog UL cov qauv;
Daim ntawv pov thawj ua los ntawm CSA lub koom haum CSA tus qauv
Cov ntawv pov thawj ua los ntawm tsis yog -CSA cov qauv.
Muaj ob hom fuse khoom hauv Nyij Pooj: A thiab B. Tus qauv ntawm Chav Kawm A yog sib npaug rau UL, thiab tus qauv ntawm chav kawm B yog Nyiv tus kheej cov lus qhia, thiab nws cov ntawv pov thawj yog: MITI -
International Electrotechnical Commission Electrical Product Safety Certification Organization (IECEE) Certification Body Committee (CCB) koom ua ke tsim ib daim ntawv pov thawj uas tuaj yeem hloov pauv tau ntawm cov tswv cuab ---- CB daim ntawv pov thawj, muab los ntawm lub koom haum muab ntawv pov thawj thiab lees paub lub teb chaws, nrog rau daim ntawv pov thawj txuas, siv los qhia rau lwm lub teb chaws daim ntawv pov thawj lub cev, Ib qho piv txwv ntawm cov khoom siv hluav taws xob nrog cov qauv IEC tau raug kuaj thiab kuaj tau ua pov thawj kom ua raws li tus qauv ntawd
Ib tug qauv. Cov khoom uas tau txais daim ntawv pov thawj CB tau yooj yim nkag mus rau hauv kev ua lag luam ntawm lwm lub teb chaws (cov cheeb tsam) nrog cov txheej txheem tib yam, thiab tseem tuaj yeem hloov pauv tau yooj yim rau hauv daim ntawv pov thawj kev nyab xeeb ntawm cov teb chaws no.
CB system muaj ntau tshaj 30 lub teb chaws cov tswv cuab. Feem ntau ntawm cov teb chaws muaj kev lag luam hauv North America thiab Europe yog cov tswv cuab ntawm CB system, suav nrog Tuam Tshoj. Lub 617 thiab 618 series ntawm fuse khoom ntawm Suzhou Ritorvis Fuse Co., Ltd. yog tib yam khoom fuse uas tau txais CB daim ntawv pov thawj hauv Suav teb.
Rau kev siv yooj yim thiab kev nyeem ntawv, kuv tau sau qee cov qauv fuse tseem ceeb raws li hauv qab no: