Ingxoxo ngomthamo wokuphuka kwamanje we-short-circuit wama-low-voltage circuit breakers ama-distribution transformers

Njengoba idatha yomthamo wesistimu yesekethe esifushane kanye ne-impedance yesekethe esifushane kudingeka inikezwe umnyango wokuphakelwa kwamandla kagesi, ukwakheka kukagesi kwemisebenzi eminingi yokwakha yokwakha akwenzi izibalo zamanje zesekethe esifushane ezinembile njengamanje.

Indlela efanele: Bala ugesi we-short-circuit ohlangothini lwe-low-voltage kuma-transformer anamakhono ahlukene ephrojekthi ngayinye, kufaka phakathi okungenani inani eliphakeme logesi we-short-circuit: i p

I-RMS Yamanje Yesiyingi Esifushane Esizinzile Sesimo Esiqinile: I k

Uma ukhetha i-circuit breaker, okungenani amandla okuphula i-short-circuit alinganisiwe e-circuit breaker kufanele aqinisekiswe: I i-cu

Okungenani ngaphansi kwalokhu: I k

Kuphrojekthi ngayinye, ikhebula elinendawo encane kakhulu enqamula kanye nendlela emfushane kufanele kukhethwe ukuze kuqinisekiswe ukuzinza kokushisa kwamanje okushintshashintshayo, kanye netheminali yomthwalo enendawo ende kakhulu yokusatshalaliswa kufanele kukhethwe ukuze kuhlaziywe ukwehla kwamandla kagesi. Uma indawo enqamulayo yekhebula ingahlangabezani nezidingo, indawo enqamulayo yekhebula kufanele ilungiswe.

Ngaphansi kwesimo sokuthi umthamo wesistimu awunamkhawulo, amapharamitha wamanje wesekethe endaweni yokukhipha ohlangothini lwe-voltage ephansi ye-transformer ahambisana nomthamo ohlukile kanye namapharamitha we-voltage ye-impedance yesekethe emfushane kumele abe mkhulu kunomthamo wesekethe emfushane wephrojekthi yangempela lapho umthamo wayo wesekethe emfushane wesistimu ungenamkhawulo. Ingasetshenziswa ukuhlola ukusatshalaliswa kwe-voltage ephansi. Umthamo wokuphuka we-circuit breaker kagesi.

Isibonelo, kungabonakala etafuleni lokukhetha lamandla okujikeleza okufushane kwamakhebula e-XLPE e-copper core e-low-voltage ukuthi kuma-transformer angu-1000kVA nangaphansi, indawo enqamulayo yekhebula lokusabalalisa ebhasini le-low-voltage akufanele ibe ngaphansi kuka-10mm2; kuma-transformer amakhulu kuno-1000kVA, indawo enqamulayo yekhebula lokusabalalisa akufanele ibe ngaphansi kuka-16mm2.

Kumaphrojekthi okwakha umphakathi amakhulu noma abalulekile, ukubalwa kwamanje okusebenza nge-short-circuit kuyanconywa uma i-short-circuit inethonya elikhulu ekukhetheni imishini.