Intshayelelo elula yokutshintsha umhlaba

Anukutshintsha umhlaba, ekwathiywa ngegamaukutshintsha komhlaba, sisixhobo sokutshintsha oomatshini esisetyenziselwa ukuthoba ngabom isekethe.

Ngaphantsi kweemeko ezingaqhelekanga (ezifana neesekethe ezimfutshane), i-earthing switching inokuthwala i-current rated short circuit current kunye ne-peak current ehambelanayo ngexesha elithile; Nangona kunjalo, phantsi kweemeko eziqhelekileyo zokusebenza, akufuneki ukuba uphathe okwangoku.

Ukutshintshela umhlaba kunye nokuqhawula ukudibanisa zihlala zidibaniswa kwisixhobo esinye. Ngeli xesha, ukongeza kunxibelelwano oluphambili, iswitshi yokwahlula ikwaxhotyiswe ngenguqu yomhlaba yokumisa isiphelo esinye sotshintsho lokuzihlukanisa emva kokuvulwa. Uqhagamshelwano oluphambili kunye nokutshintsha komhlaba ngokuqhelekileyo kufakwe ngomatshini ngendlela enokuthi i-earthing switching ivalwe xa ukutshintshwa kwe-isolation ivaliwe kwaye uqhagamshelwano oluphambili alukwazi ukuvalwa xa ukutshintshwa komhlaba kuvaliwe.

Ukutshintsha komhlaba ngokwesakhiwo kunokwahlulwa zibe zintlobo ezimbini ezivulekileyo nezivaliweyo. Inkqubo yokuqhuba yangaphambili ibonakaliswe kwi-atmosphere kunye ne-earthing switch efana ne-isolation switch, kunye ne-conductive system yokugqibela ifakwe kwi-SF yentlawulo. Okanye ioli kunye nezinye izixhobo zokukhusela.

Ukutshintsha umhlaba kufuneka uvale i-short circuit current, kwaye kufuneka ube nesakhono esithile sokuvala isiphaluka esifutshane kunye nokuzinza okuguquguqukayo kunye ne-thermal. Nangona kunjalo, akufuneki ukuphula umthwalo wangoku kunye nombane omfutshane, ngoko akukho sixhobo sokucima i-arc. Isiphelo esisezantsi somese sivame ukudibaniswa kwindawo yomhlaba ngokusebenzisa i-transformer yangoku. I-transformer yangoku inokunika umqondiso wokukhusela i-relay.

Izitshixo zomhlaba zezakhiwo ezahlukeneyo zohlulwe zibe yipali enye, ipali ephindwe kabini kunye neepali ezintathu. Ipali enye isetyenziselwa kuphela kwiinkqubo ezisezantsi ezingathathi hlangothi, ngelixa iipali eziphindwe kabini kunye nezithathu zisetyenziselwa kwiinkqubo ezingathathi hlangothi ezingenanto kwaye zabelane ngendlela enye yokusebenza yokusebenza.