Mazana a ma amperes opitilira 1000 amperes amtundu wa katundu, momwe mungasankhire wophwanya dera

Zopangira ma circuit breakersadavotera 10A mpaka 1600A, ndizowononga chimango (ACB)adavotera kuchokera ku 630A mpaka 6300A.Onani kuumbidwa mlandu circuit breaker ndiair circuit breakeroveteredwa panopa palina malo, nthawi zina sindikudziwa kusankha.

Pali mfundo zingapo pano.

Dongosolo logawa koyamba munjira yogawa, yomwe ili ndi loop ya chakudya ndi loop yamoto.

Chinthu chotchinjiriza cha chodulira dera la chakudya ndi chingwe.Pa nthawi yomweyo chakudyawowononga deraayenera kuzindikira mgwirizano wachitetezo ndi omwe akubwerawowononga derawa yachiwiri kugawa dongosolo, kotero chakudyawowononga deraAyenera kukhala ndi chitetezo chocheperako cha S.

Thermomagnetickuumbidwa mlandu circuit breakerili ndi magawo awiri okha achitetezo, ndiye kuti, kuchulukirachulukira kwanthawi yayitali L parameter ndi dera lalifupi nthawi yomweyo I parameter, sikoyenera kulumikiza chingwe chautali wautali, ndikugwiritsa ntchitoelectronic molded case circuit breakerndi magawo atatu a chitetezo.

Kwa mabwalo amagalimoto, gwiritsani ntchito chophwanya maginito chimodzi, ndiye kuti, chitetezo chozungulira chachifupi, palibe chotchingira choteteza mochulukira.Zowoneka, izi ndizosiyananso ndi zachizolowezipulasitiki kesi circuit breaker.

Komanso, ngati pali kudzipatula thiransifoma potuluka kugawa koyamba, chifukwa thiransifoma inrush panopa pafupifupi wofanana ndi yochepa dera panopa, oveteredwa panopa wa wosweka dera akhoza kusankhidwa malinga 1.6 nthawi oveteredwa panopa wa. transformer powerengera.Ngati chosinthira chodzipatula chili ndi mphamvu yayikulu,zowononga mpweyazitha kugwiritsidwa ntchito.

Mwachitsanzo, 250kVA 0.4kV mpaka 0.4kV kudzipatula thiransifoma, impedance voteji ndi 6%, oveteredwa panopa ndi:

Short-circuit current ndi:

Timagawaniza kagawo kakang'ono ndi 10 kuti tipeze 600A, chifukwa chake timagwiritsa ntchito chosokoneza chigawo ndi 630A monga mwachizolowezi.

Komabe, timaganizira kutalika kwa nthawi yachisangalalo chothamangitsidwa, tikufuna kugwiritsa ntchito kuchedwa kwachidule kwa S parameter kuti tichedwe, ndiye kuti 630A kuumbidwa mlandu wosweka si wabwino, kugwiritsa ntchito 800A chimango wosweka wozungulira, chimango wowononga dera lalifupi kuchedwa nthawi. yaitali.

Kuonjezera apo, poganizira chingwe chakunja, m'pofunika kuyang'ana kutentha kwa chingwe, chomwe chidzawonjezera mtengo wamakono wamagetsi ozungulira.

Zowoneka, tiyenera kuganizira za mtundu wanji wophwanya dera womwe tingasankhe.