Aikhefu lomthwaloiswitshi sisixhobo sombane phakathi kwei-high-voltage circuit breakerkunye aiswitshi yokwahlula yombane ephezulu . Kweli nqaku, makhe sijonge umgaqo wokusebenza wokutshintsha umthwalo kunye nomahluko phakathi kokutshintsha komthwalo kunye ne-breaker circuit.
Umgaqo wokusebenza wokutshintsha umthwalo wokuqhawula
I-high-voltagetshintsha ikhefu lomthwalo isebenza ngokufanayo kwi-breaker circuit. Ngokuqhelekileyo, ukufakwa kwesixhobo esilula sokucima i-arc, kodwa isakhiwo sayo silula. Umfanekiso ubonisa iswitshi yekhefu loxinzelelo oluphezulu lomoya oxinanisiweyo. Inkqubo yokusebenza kwayo kukuba: xa i-brake ivuliwe, phantsi kwesenzo se-spring yokuvula, i-spindle ijikelezwa nge-clockwise. Kwelinye icala, ipiston ihambela phezulu ngokusebenzisa indlela yesilayidi secrank ukucinezela irhasi; Kwelinye icala, ngenkqubo yothumelo eyenziwe ngeeseti ezimbini ze-four-link mechanism, imela engundoqo ivulwa kuqala, emva koko i-arc breaker ityhalwe ukuze ivule i-arc breaker contact, kwaye umoya ocinezelweyo kwi-cylinder uvuthelwe ngaphandle. ngombhobho ukukhupha i-arc.
Xa uvala, i-main cutter kunye ne-arc breaker ijika ngaxeshanye nge-spindle kunye ne-transmission system, kunye ne-arc breaker contact ivalwe kuqala. I-spindle iyaqhubeka nokujikeleza ukuze uqhagamshelwano oluphambili luvale kamva. Ngethuba lenkqubo yokuvala, intwasahlobo yokuvula ngexesha elifanayo igcina amandla. Ngenxa yokuba iswitshi yekhefu lomthwalo ayinako ukwaphula isiphaluka esifutshane sangoku, isoloko isetyenziswa ngokucutha i-fuse yamandla ombane aphezulu. Umsebenzi wokunciphisa wangoku we-fuse yokukhawulela yangoku awugqibi kuphela umsebenzi wokuqhawula isiphaluka, kodwa unciphisa kakhulu impembelelo yombane oshushu kunye nombane obangelwa yi-short circuit current.
Ke ngoko, iswitshi yekhefu lomthwalo sisixhobo sokutshintsha phakathi kwebreaker yesekethe kunye neswitshi yodwa. Inesixhobo sokucima i-arc esilula, esinokuthi sinqumle umthamo olinganisiweyo wangoku kunye nomthamo othile ogqithisiweyo, kodwa awukwazi ukunqumla umbane omfutshane.
Umahluko phakathi kokutshintsha kwekhefu lomthwalo kunye nabaphuli beesekethe
Ukususela kumbono wendabuko, ukutshintshwa kwekhefu lomthwalo kuhluke kakhulu kwiisekethe zesiphaluka. Ukutshintshwa kwekhefu lomthwalo kusetyenziselwa ikakhulu ukuphula nokuvala umthwalo wangoku. Ingasetyenziselwa kunye ne-high-voltage fuses yokutshintsha ii-breaker circuits zexabiso eliphezulu kwaye unqumle i-fault current, oko kukuthi, i-short-circuit current. Kugqitywe ukuba umsebenzi wokucima i-arc wokutshintshwa kwekhefu lomthwalo ubuthathaka, okunciphisa iindleko zokuvelisa. Kuchanekile ngenxa yokuba iswitshi yekhefu yomthwalo wemveli ayisetyenziselwa ukunqumla umahluko phakathi kwempazamo yangoku kunye ne-breaker yesiphaluka, akukho mfuneko yokudibanisa isixhobo sokukhusela kunye nesixhobo esizenzekelayo, ngoko ke uninzi lokutshintsha komthwalo wenziwa ngesandla. yaqhutywa. Ayikwazi kuqhutywa ngombane. Kwi-design ye-circuit breaker, kucatshangelwa ukuba akukhona nje ukuba umthwalo wangoku ungavulwa kwaye ucinywe.
Ukutshintsha okulungiselelwe ngokukodwa ukusingatha okwangoku (impazamo yangoku, ireyithingi yangoku) ngabaphuli beesekethe, kwaye inqanaba le-insulation ye-breaker breakers liphantsi kakhulu, ngoko ke ukukwazi ukuphatha i-overvoltage buthathaka kakhulu. Umtshini olungiselelwe ngokukodwa ukujongana nombane (inqanaba le-insulation of fracture liphezulu kakhulu, elinokujongana nexabiso eliphezulu lokuqhekeka kwe-voltage ukumelana nexabiso) ngumtshintshi wokuzihlukanisa, owaziwa ngokuba yi-brake tool. Ukutshintshela ikhefu lomthwalo kukutshintsha phakathi kwezi zibini ezinokusingatha okwangoku (i-rating yangoku) kunye ne-voltage (inqanaba lokufakelwa kwekhefu liphezulu kune-breaker circuit, kodwa lisezantsi kunokutshintshwa kwe-isolation), kodwa nangona i-switch breaking switch ingaphula kwaye vala i-current rated current, ukuvala i-short circuit current, kodwa kunqatshelwe ngokungqongqo ukuphula i-short circuit current.
Lo ngumgaqo wokusebenza wokutshintshwa komthwalo wokuqhawula umthwalo kunye nokwahlukana phakathi kokutshintsha komthwalo kunye ne-breaker circuit.
Ixesha lokuposa: Oct-26-2023