Sibala kanjani isilinganiso samanje sekhebula?-Slocable

Umthamo wamanje wokuthwala we-conductor noma ikhebuli evalekile umkhawulo wamanje ongawuthwala ngokuqhubekayo ngaphandle kokweqa izinga lokushisa.Kwaziwa nangokuthi i-ampacity.

Ngenkathi amakhebuli esebenza alahlekelwa ugesi okubonakala njengokushisa kusikhondatha, ukufakwa kwensimbi kanye nanoma yiziphi ezinye izingxenye zensimbi ekwakhiweni.Isilinganiso samanje sizoncika ekutheni lokhu kushisa kukhishwa kanjani endaweni yekhebula nasezindaweni ezizungezile.Ukulinganisa izinga lokushisa kwekhebula kuyisici esinqumayo kumthamo wamanje wokuthwala wekhebula.Isilinganiso esiphezulu sokushisa sekhebula sinqunywa ngokuyisisekelo impahla yokufakelwa.

Ngokukhetha izinga lokushisa le-ambient njengesisekelo sendawo ezungezile, ukukhuphuka kwezinga lokushisa okuvunyelwe kuyatholakala lapho isilinganiso esiphezulu sekhebula singabalwa khona endaweni ethile.Uma inani lokumelana nokushisa kwesendlalelo sezinto ezibonakalayo esakhiweni sekhebula laziwa, lamanje elilinganiselwe lingabalwa.

Ifomula yokubala umthamo wamanje wokuthwala ithi:

I = isilinganiso samanje esivumelekile

∆Φ = Ukwenyuka kwezinga lokushisa ku-(K)

R= Ukushintshana kwamanje ukumelana nobude beyunithi ngayinye ye-conductor ezingeni lokushisa eliphezulu lokusebenza (Ω/m)

I-Wd = ukulahlekelwa kwe-dielectric ngobude beyunithi ngayinye ye-insulation ezungeze umqhubi (W/m)

T1= Ukumelana nokushisa ngobude beyunithi ngayinye phakathi kwe-conductor eyodwa nesheath (K m/W)

I-T2 = ukumelana nokushisa ngobude beyunithi ngayinye yokulala phakathi kwe-sheath nezikhali (K m/W)

I-T3 = ukumelana nokushisa ngobude beyunithi ngayinye ye-Sheath yangaphandle yekhebula (K m/W)

T4 = ukumelana nokushisa ngobude beyunithi ngayinye phakathi kwendawo yekhebula nendawo ezungezile (K m/W)

n = inani lama-conductor athwala umthwalo kukhebula (amakhondatha anosayizi olinganayo futhi athwele umthwalo ofanayo)

λ1 = Isilinganiso sokulahlekelwa emgodleni wensimbi kuya ekulahlekelweni okuphelele kuwo wonke amakhondatha akuleyo ntambo

λ2 = isilinganiso sokulahlekelwa kumpahla yezikhali kuya ekulahlekelweni okuphelele kuwo wonke amakhondatha kuleyo ntambo.