I-Isolating switch (i-disconnect switch) luhlobo lwesixhobo sokutshintsha ngaphandle kwesixhobo sokucima i-arc. Isetyenziselwa ikakhulu ukuqhawula isekethe ngaphandle komthwalo wangoku kwaye ukwahlula unikezelo lwamandla. Kukho indawo ecacileyo yokuqhawula kwindawo evulekileyo ukuze kuqinisekiswe ukuhlolwa okukhuselekileyo kunye nokulungiswa kwezinye izixhobo zombane. Iyakwazi ukudlula ngokuthembekileyo umthwalo oqhelekileyo wangoku kunye nephutha lesiphaluka esifutshane kwimeko evaliweyo.
Ngenxa yokuba ayinaso isixhobo esikhethekileyo sokucima i-arc, ayikwazi ukunqumla umthwalo wangoku kunye ne-short-circuit current. Ngoko ke, ukutshintshwa kwe-isolation kungasebenza kuphela xa isiphaluka sinqanyuliwe ngumqhubi wesiphaluka. Kuvinjelwe ngokungqongqo ukusebenza ngomthwalo ukuphepha izixhobo ezinzulu kunye neengozi zomntu. Kuphela i-voltage transformers, izithinteli zombane, iziguquli ezingenamthwalo kunye ne-excitation current engaphantsi kwe-2A, kunye neesekethe ezingenayo imithwalo engaphantsi kwe-5A yangoku inokusebenza ngokuthe ngqo kunye nokutshintshwa kokuzimela.
Umthwalo we-bvreak switch (LBS) luhlobo lwesixhobo sokutshintsha phakathi kwe-breaker yesiphaluka kunye nokutshintsha okukodwa. Inesixhobo sokucima i-arc esilula, esinokuthi sinqumle umthamo olinganisiweyo womthwalo kunye nomthamo othile ogqithisiweyo, kodwa awukwazi ukunqumla i-short-circuit current.
Umehluko:
Ukwahluke kwi-switching yodwa, ukutshintshwa komthwalo kunesixhobo sokucima i-arc, esinokuthi sihambe ngokuzenzekelayo ukutshintshwa komthwalo ngokukhupha i-thermal xa ilayishwe kakhulu.
Ixesha lokuposa: Nov-30-2021