Aikhefu lokulayishaswitch into esebenza ngogesi phakathi kwe-ai-high-voltage circuit breakerkanye ahigh-voltage isolation switch . Kulesi sihloko, ake sibheke isimiso sokusebenza sokushintshwa kwe-load break kanye nomehluko phakathi kwe-load break break kanye ne-circuit breaker.
Umgomo wokusebenza wokushintsha kwekhefu lokulayisha
I-high-voltageukushintshwa kwekhefu lokulayisha isebenza ngokufanayo ne-circuit breaker. Ngokuvamile, ukufakwa kwedivaysi yokucima i-arc elula, kodwa isakhiwo sayo silula. Isithombe sibonisa iswishi yekhefu lomthwalo ophezulu womoya ocindezelwe. Inqubo yayo yokusebenza ithi: lapho i-brake ivuliwe, ngaphansi kwesenzo se-spring yokuvula, i-spindle ijikeleziswa ngewashi. Ngakolunye uhlangothi, ipiston iya phezulu ngokusebenzisa indlela yesilayidi se-crank ukuze iminyanise igesi; Ngakolunye uhlangothi, ngohlelo lokudlulisela olwakhiwe ngamasethi amabili e-four-link mechanism, ummese oyinhloko uvulwa kuqala, bese i-arc breaker iphushwa ukuze uvule ukuxhumana kwe-arc breaker, futhi umoya ocindezelwe kusilinda uyashaywa. ngokusebenzisa i-nozzle ukukhipha i-arc.
Lapho uvala, i-main cutter ne-arc breaker zijika zibheke kwewashi ngesikhathi esifanayo ngokusebenzisa i-spindle kanye nesistimu yokudlulisa, futhi ukuthintana kwe-arc breaker kuvalwe kuqala. I-spindle iyaqhubeka nokujikeleza ukuze othintana naye oyinhloko avale kamuva. Phakathi nenqubo yokuvala, intwasahlobo yokuvula kanyekanye igcina amandla. Ngenxa yokuthi ukushintshwa kwekhefu lokulayisha akukwazi ukunqamula umjikelezo wesifunda esifushane, kuvame ukusetshenziswa ne-fuse yamanje ekhawula amandla aphezulu. Umsebenzi wamanje wokukhawulela we-fuse yokukhawulela yamanje awugcini nje ngokuqeda umsebenzi wokuphula isifunda, kodwa futhi unciphisa kakhulu umthelela wamandla okushisa kanye nogesi obangelwa amandla wesifunda esifushane.
Ngakho-ke, ukushintshwa kwekhefu lomthwalo kuyisici esishintshayo phakathi kwe-circuit breaker kanye neswishi yokuhlukanisa. Inomshini wokucima i-arc olula, onganqamula umthamo olinganiselwe wamanje kanye nomthamo othile wokulayishwa ngokweqile, kodwa awukwazi ukunqamula umjikelezo omfushane wamanje.
Umehluko phakathi kokushintshwa kwekhefu lokulayisha kanye nama-circuit breaker
Ngokombono wendabuko, ukushintshwa kwekhefu lokulayisha kuhluke kakhulu kuma-circuit breakers. Iswishi yekhefu lokulayisha isetshenziswa kakhulu ukuphula nokuvala umthamo wamanje. Ingasetshenziswa ngamafusi ane-voltage ephezulu ukuze kungene ama-breaker circuit anenani eliphezulu futhi kunqanyulwe i-fault current, okungukuthi, i-short-circuit current. Kunqunywa ukuthi umsebenzi wokucisha i-arc we-switch break break awunamandla, okwehlisa izindleko zokukhiqiza. Kungenxa yokuthi umshini wendabuko wokunqamula umthwalo awusetshenziselwa ukunqamula umehluko phakathi kwe-fuse yamanje enephutha kanye ne-circuit breaker, asikho isidingo sokuxhuma idivayisi yokuvikela kanye nedivayisi ezenzakalelayo, ngakho-ke iningi lokushintsha kwekhefu lokulayisha kwenziwa ngesandla. kuhlinzekiwe. Ayikwazi ukusetshenziswa ngogesi. Ekwakhiweni kwe-breaker circuit, kucatshangwa ukuthi akukhona nje kuphela ukuthi umthamo wamanje ungavulwa futhi uvaliwe.
Ukushintsha okuklanyelwe ngokukhethekile ukuphatha okwamanje (iphutha lamanje, lamanje elilinganiselwe) ama-circuit breaker, futhi izinga lokuhlukanisa ama-circuit breaker liphansi kakhulu, ngakho-ke ikhono lokusingatha i-overvoltage libuthakathaka kakhulu. Iswishi eklanyelwe ngokukhethekile ukubhekana ne-voltage (izinga le-insulation of the fracture liphezulu kakhulu, elingabhekana nevelu yokumelana ne-voltage ephezulu yokuphuka) iyiswishi yokuhlukanisa, eyaziwa ngokuthi ibhuleki lethuluzi. I-switch break break iwukushintsha phakathi kwalokhu okubili okungakwazi ukuphatha okwamanje (okukalwe okwamanje) kanye ne-voltage (izinga lokuhlukanisa lekhefu liphakeme kune-breaker circuit, kodwa liphansi kune-switch ye-isolation), kodwa nakuba inkinobho yekhefu lomthwalo ingaphuka futhi vala i-current rated, ukuvala i-short circuit current, kodwa kuvinjelwe ngokuqinile ukuphula i-short circuit current.
Lesi yisimiso sokusebenza sokushintshwa kwekhefu lomthwalo kanye nomehluko phakathi kwe-switch break break kanye ne-circuit breaker.
Isikhathi sokuthumela: Oct-26-2023