Kuenzaniswa nemamwe maswichi ekuzviparadzanisa nevamwe, musimboti wevacuum circuit breakers wakasiyana neaya emagetsi anofuridza zvinhu. Iko hakuna dielectric mune vacuum, iyo inoita kuti arc ibve nekukurumidza. Nekudaro, iyo ine simba uye static data yekubatanidza mapoinzi eiyo disconnect switch haina kunyanya kuparadzaniswa. Isolation switches inowanzo shandiswa kumagetsi einjiniya michina mukugadzirisa zvidyarwa zvine yakaderera rated voltages! Nekukurumidza kusimudzira maitiro emagetsi ekupa system, 10kV vacuum circuit breakers yakave yakawanda-yakagadzirwa uye inoshandiswa muChina. Kune vashandi vekuchengetedza, rave dambudziko rekukurumidzira kuvandudza kubata kwevacuum circuit breakers, kusimbisa kuchengetedza, uye kuita kuti vashande zvakachengeteka uye nekuvimbika. Tichitora ZW27-12 semuenzaniso, bepa rinosuma muchidimbu musimboti wekutanga uye kuchengetedzwa kwevacuum circuit breaker.
1. Insulation zvinhu zvevacuum.
Vacuum ine insulating yakasimba. Mune vacuum circuit breaker, mhute yakatetepa kwazvo, uye kurongeka kwemaitiro emushonga wemolecular mhute yakakura, uye mukana wekudhumhana idiki. Naizvozvo, kungoerekana kwaitika haisiriyo chikonzero chikuru chekupinda kwevacuum gap, asi pasi pekuita kweiyo yakakwira kuomarara munda wemagetsi, ma electrode-deposited metal material particles ndiwo anonyanya kukanganisa kukanganisa.
Iyo dielectric compressive simba mune vacuum gap haina hukama chete nehukuru hwegomba uye chiyero chemunda wemagetsi, asiwo zvakanyanya kukanganiswa nehunhu hwesimbi electrode uye chiyero chepamusoro pedenga. Pane diki chinhambwe gap (2-3mm), iyo vacuum gap ine insulating zvimiro zveyakanyanya-kudzvanywa gasi uye SF6 gasi, ndosaka nzvimbo yekubatanidza yekuvhura chinhambwe chevacuum wedunhu breaker kazhinji idiki.
Iyo yakananga pesvedzero yesimbi electrode pane yekuputsika voltage inonyatso kuratidzwa mukuoma kwesimba (kumanikidza simba) yezvakagadzirwa uye nzvimbo yekunyungudika yesimbi zvinhu. Iyo yakakwira iyo simba rekumanikidza uye nzvimbo yekunyungudika, iyo inokwirisa iyo dielectric compressive simba remagetsi nhanho pasi pevacuum.
Ongororo dzinoratidza kuti iyo yakakwira iyo vacuum kukosha, iyo yakakwira yekuputsa voltage yegeji gasi, asi isingachinjike pamusoro pe10-4 Torr. Naizvozvo, kuitira kuchengetedza zvirinani iyo insulation compressive simba yevacuum magineti inovhuvhuta kamuri, iyo vacuum degree haifanirwe kunge yakaderera pane 10-4 Torr.
2. Kugadzwa uye kudzima kwearc mune vacuum.
Iyo vacuum arc yakasiyana chaizvo neyekuchaja uye yekuburitsa mamiriro evapor arc yawakambodzidza. Mamiriro asina kurongeka emhute haisiriyo inonyanya kukonzera arcing. Vacuum arc kuchaja uye kuburitsa inogadzirwa mumhute yesimbi zvinhu zvinopisa nekubata electrode. Panguva imwecheteyo, saizi yekutyora ikozvino uye arc maitiro anosiyanawo. Isu tinowanzo kupatsanura kuita yakaderera-ikozvino vacuum arc uye yakakwirira-ikozvino vacuum arc.
1. Diki ikozvino vacuum arc.
Kana nzvimbo yekuonana ichivhurwa muvacuum, inokonzeresa yakashata ye electrode color spot iyo yazvino uye kinetic simba rakanyanya kunyura, uye yakawanda yesimbi zvinhu mhute inoshanduka kubva kune negative electrode color spot. akabatidzwa. Panguva imwecheteyo, iyo simbi yezvinhu mhute uye zvimedu zvine magetsi muarc column zvinoramba zvichipararira, uye nhanho yemagetsi inoenderera mberi nekupisa zvimedu zvitsva kuzadza. Apo ikozvino inoyambuka zero, simba rekinetic re arc rinoderera, kutonhora kwe electrode kunoderera, mhedzisiro chaiyo yevolatilization inoderera, uye kuwanda kwehuwandu muarc column inoderera. Pakupedzisira, nzvimbo yakaipa ye electrode inoderera uye arc inodzima.
Dzimwe nguva volatilization haigone kuchengetedza chiyero chekuparadzira chearc column, uye arc inodzima kamwe kamwe, zvichikonzera kuteya.
Nguva yekutumira: Kubvumbi-25-2022