Ukuhlukaniswa okuyinhloko nezici zomkhiqizo zama-breaker-voltage circuit breaker (ama-air switch)

Ukuhlukaniswa okuyinhloko nezici zomkhiqizo ze-low-voltage ama-circuit breakers (amaswishi omoya)

Indlela eyinhloko yokuhlukanisa i-low-voltage circuit breakers, ngokusekelwe kwifomu labo lesakhiwo, ivulekile kanye nohlobo lwemishini, okuwuhlelo olujwayelekile lomkhiqizo. I-Open ibizwa nangokuthi uhlobo lohlaka noma uhlobo lwendawo yonke, kuyilapho uhlobo lwemishini lubizwa ngokuthi uhlobo lwegobolondo lepulasitiki.

Umgomo ojwayelekile wokukhetha ama-circuit breaker.

I-voltage elinganiselwe yokusebenza ye-breaker circuit kufanele ibe nkulu noma ilingane ne-voltage elinganiselwe yomugqa.Izinga lamanje elilinganiselwe le-breaker circuit kufanele libe likhulu noma lilingane nomthwalo wamanje womugqa. Umthamo wokuphulwa kwesekethe emfishane olinganiselwe we-breaker circuit kufanele ube mkhulu noma ulingane nomkhawulo wamanje wesekethe omfushane ongase uvele emugqeni (ubalwe njengenani elisebenzayo) Izikhathi ezingu-1.25 isethi yamanje yokukhululwa ngokushesha kwe-circuit breaker.I-voltage elinganiselwe yokukhululwa kwe-undervoltage ye-circuit breaker kufanele ilingane ne-voltage elinganiselwe yomugqa.I-voltage elinganiselwe yokukhululwa kwe-shunt ye-circuit breaker kufanele ilingane nokulawula amandla kagesi.I-voltage elinganiselwe yokusebenza yedrayivu kagesi kufanele ilingane ne-control circuit power breaker i-voltage ye-wiring. Amanye amamodeli ama-circuit breakers avumela kuphela ukuthi umugqa ungene kusuka phezulu, kanti amanye amamodeli avumela ukuthi umugqa ungene kusuka phezulu noma phansi.

Izimiso zokukhetha ama-circuit breaker ane-voltage ephansi

1.Nquma uhlobo kanye nefomu lokuvikela le-breaker circuit ngokusho kwezidingo zokuvikela zomugqa: khetha uhlobo lohlaka, uhlobo lwemishini noma uhlobo lwamanje lokukhawulela, njll.
I-circuit breaker yohlobo lwezisetshenziswa: Inegobolondo lepulasitiki elivikelayo, isistimu yokuxhumana eyakhelwe ngaphakathi, igumbi lokucisha i-arc kanye nokukhululwa, njll., futhi ingavalwa ngesandla noma ngogesi (kuma-breaker circuit amandla amakhulu). Inamandla okuphuka aqinile, ukuzinza okuphezulu okuguquguqukayo, kanye nemisebenzi yokuvikela ekhethiwe ephelele uma kuqhathaniswa. Isetshenziswa kabanzi emigqeni yokusabalalisa. Njengamanje, imikhiqizo evame ukusetshenziswa ihlanganisa i-DZ15, DZ20, DZX19, C45N (manje ithuthukiswe ku-C65N) nolunye uchungechunge. Phakathi kwazo, ama-C45N (C65N) ama-circuit breaker anezinzuzo zosayizi omncane, amandla okuphuka aqinile, ukusebenza okuhle komkhawulo wamanje, ukusebenza okulula, namamodeli aphelele kanye nokucaciswa. Angahlanganiswa kalula abe ama-pali amabili, izigxobo ezintathu kanye nezigxobo ezine ezisekelwe esakhiweni se-pole-pole, futhi asetshenziswa kakhulu emagatsheni okukhanyisa umphakathi kanye nemigqa yegatsha engu-60A nangaphansi (isetshenziswa kakhulu ekushintsheni kwelayini engenayo yabasebenzisi bezindawo zokuhlala kanye nokukhanyisa ukushintsha kwamagatsha ezindaweni zokuthenga).
I-2.I-Frame-type low-voltage circuit breaker: umthamo omkhulu, umthamo oqinile we-short-circuit breaking, ukuzinza okuphezulu okuguquguqukayo, okulungele i-AC 50Hz, inethiwekhi yokusabalalisa elinganiselwe ye-voltage engu-380V, njengesivikelo esiyinhloko semigqa ye-trunk yokusabalalisa. Ama-circuits ohlobo lohlaka ikakhulukazi akhiwe isistimu yokuxhumana, indlela yokusebenza, ukukhishwa kwe-overcurrent, ukukhishwa kwe-shunt, ukukhishwa kwe-undervoltage, izisetshenziswa nohlaka, njll. Zonke izingxenye ziboshiwe futhi zifakwe kusisekelo sesakhiwo sozimele. Njengamanje, ama-breaker circuit asetshenziswa kakhulu ohlobo lwefreyimu ephansi ezweni lami yi-DW15, ME, AE, AH nolunye uchungechunge. Ama-circuit breaker we-DW15 athuthukiswa futhi akhiqizwa ezweni lami. Uchungechunge olugcwele luhlanganisa amamodeli amaningana afana ne-1000, 1500, 2500, ne-4000A. Izinqamuli zesekethe ze-ME, AE, kanye ne-AH zikhiqizwa kusetshenziswa ubuchwepheshe obungenisiwe, obunezincazelo namamodeli aphelele uma kuqhathaniswa (ngishintsha amazinga amanje ukusuka ku-630A kuye ku-5000A, isamba samazinga ayi-13), futhi umthamo wokuphuka olinganiselwe unamandla kunalowo we-DW15. Zivame ukusetshenziselwa ukuvikela okuyinhloko kwama-voltage aphansi okusabalalisa iziqu.
3.Ama-circuit breaker ahlakaniphile: Njengamanje, kunezinhlobo ezimbili zama-circuit breaker akhiqizwa ezweni lami: uhlobo lohlaka kanye nohlobo lwegobolondo lepulasitiki. Ama-breaker circuit ahlakaniphile ohlaka lwefreyimu asetshenziswa ikakhulukazi njengama-circuit breaker wezinhlelo ezihlakaniphile zokusabalalisa okuzenzakalelayo, kuyilapho ama-breaker epulasitiki ohlobo lwegobolondo ehlakaniphile asetshenziselwa ukusatshalaliswa kwamandla kumanethiwekhi okusabalalisa nokulawula nokuvikela imigqa nemishini yokuphakela amandla. Isetshenziswa njengokulawula kwezigaba ezintathu zekheji ama-asynchronous motors. Izimpawu zamagebhula amasekethe ahlakaniphile ukuthi asebenzisa izilawuli ezihlakaniphile (amadivayisi ohambo ahlakaniphile) anama-microprocessors noma ama-single-chip microcomputer njengomongo, futhi anemisebenzi yokuqapha okuku-inthanethi, ukulungisa okuzenzakalelayo, ukulinganisa, ukuhlola, ukuzihlola, ukuxhumana, njll. amapharamitha lapho isekethe yokuvikela isebenza, futhi igcine le mingcele kumemori engaguquguquki ukuze uthole umbuzo. Amamodeli ajwayelekile wasekhaya ahlakaniphe kakhulu ahlanganisa i-DW45, DW40, DW914 (AH), DW18 (AE-S), DW48, DW19 (3WE), DW17 (ME), njll.

Lapho ukhetha i-circuit breaker, izimiso ezilandelayo kufanele zibhekwe:

1. I-voltage elinganiselwe (i-UN) yesihlukanisi sesekhethi kufanele ilingane noma ibe nkulu kunevoltheji elinganiselwe yolayini ovikelwe.
2. I-voltage elinganiselwe yokukhishwa kwe-undervoltage ye-breaker circuit kufanele ifane ne-voltage elinganiselwe yomugqa ovikelekile.
3. Isilinganiso samanje se-circuit breaker kanye nokukhishwa kwayo okudlulele kufanele kube kukhulu noma kulingane nomthamo obaliwe wesekethe evikelekile.
4. Umthamo wokugcina wokuphulwa we-circuit breaker kufanele udlule inani elisebenzayo le-current short-circuit yamanje emgqeni.
5. Izici zokuvikela zezinqamuli zesekethe ezingaphezulu neziphansi emugqeni wokusabalalisa kufanele zihlanganiswe, nezici zokuvikela zezinga eliphansi ezibekwe ngezansi futhi zingaphambanisi nezici zokuvikela zezinga eliphezulu.
6. Umsinga wokukhubeka wesikhathi eside wesiphakeli sesekethe kufanele ube ngaphansi komsinga oqhubekayo ovumelekile wentambo.

Kuma-breaker circuit okusabalalisa amandla, izimiso zokukhetha ezilandelayo ziyasebenza:

1. Inani lokusetha lesikhathi eside sokusebenza kwe-breaker circuit akufanele lidlule umthamo ovunyelwe wokuphatha wentambo. Ngokusetshenziswa kwezintambo nekhebula, kuyatuseka ukuthi kusetshenziswe u-80% womthamo ovumelekile wokuphatha intambo nekhebula.
2. Isikhathi esibuyiswayo senani eliphindwe kathathu lesikhathi eside sokulibaziseka kokusebenza kwamanje kufanele libe likhulu noma lilingane nesikhathi sokuqala kwenjini enomkhawulo wokuqala wamanje emgqeni.
3. Inani lamanje lokusetha elisheshayo kufanele libe okungenani izikhathi ezingu-1.1 isamba somthwalo wokubala komugqa wamanje (Ijx) kanye nomkhiqizo we-coefficient yamanje yomthelela wenjini eqalayo (k1, ngokuvamile engu-1.7-2), injini eqala ukuphindaphinda yamanje (k), kanye nesilinganiso samanje senjini enkulu kunazo zonke (Icdm).

Kumabhulakhi wesekethe okuvikela izimoto, kuyasebenza imigomo elandelayo yokukhetha:

1. Inani lamanje lokulibaziseka lesikhathi eside kufanele lilingane nesilinganiso semoto samanje.
2. Ukusetha okusheshayo kwamanje kwama-breaker circuit avikela ama-cage motors kufanele kube izikhathi ezingu-8-15 zamanje ezikalwe yimoto, kuyilapho kumamotho ajikelezayo enxeba, kufanele kube izikhathi ezi-3-6 kunomthamo okaliwe wemoto.
3. Isikhathi esibuyiswayo senani lokusetha lamanje lokulibaziseka okuphindwe kasithupha kufanele libe likhulu noma lilingane nesikhathi sangempela sokuqala semoto, ngezinketho zokuthi 1S, 3S, 5S, 8S, 12S, noma 15S ngokusekelwe esisindweni somthwalo ekuqaleni.

Lapho uxhumanisa ama-circuit breaker nama-fuse, lezi zimiso ezilandelayo kufanele zibhekwe:

1. Uma i-current short-circuit endaweni yokufaka ingaphansi komthamo wokuphuka olinganiselwe wesiphakeli sesekethe, i-fuse ingasetshenziswa njengesivikelo esiyisipele ngenxa yekhono layo eliqinile elilinganiselwe lokuphuka kwesekethe emfushane. Njengoba kuboniswe kuMfanekiso 1, isici se-fuse eyisipele (1) sihlangana nesici se-breaker circuit (2). Uma kwenzeka umugqa omfushane we-circuit, isikhathi sokuphuka kwe-fuse sifushane kune-circuit breaker, okuqinisekisa ukuphepha kwe-circuit breaker. Iphoyinti lokudlulisa ezicini lingakhethwa ku-80% womthamo olinganiselwe we-breaker circuit breaking.
2. I-fuse kufanele ifakwe ohlangothini lwamandla lwe-breaker circuit ukuqinisekisa ukusetshenziswa okuphephile.