Izinhlobo zabaphuluki bemijikelezo

Izinhlobo zabaphuluki bezifunda

(1) I-Air Circuit Breaker (ACB)

Abaphuluki bemijikelezo yomoya, eyaziwa nangokuthi amakhefu wesifunda sendawo yonke, anazo zonke izingxenye ezigcinwe ngaphakathi kohlaka lwensimbi olufakiwe. Ngokuvamile zivame ukutholakala futhi zingathola okunamathiselwe okuhlukahlukene, okwenza kube lula ukushintsha oxhumana nabo nezingxenye. Isetshenziswa kakhulu njengokushintshwa okusemqoka ekupheleni komthombo wamandla, kubonisa isikhathi eside, isikhathi esifushane, ngaso leso sikhathi, nokuvikelwa kwamaphutha emhlabathini. Lezi zilungiselelo zingashintshwa ngaphakathi kwebanga elithile ngokususelwa ezingeni lefreyimu.

Ama-Air Circuit Breakers alungele i-AC 50HZ, alinganiswe ama-voltages angama-380v kanye ne-660v, kanye nemisinga ekalwe kusuka ku-200300A kumanethiwekhi okusatshalaliswa. Ngokuyinhloko asetshenziselwa ukusabalalisa amandla kagesi futhi avikele amasekethe kanye nemishini yamandla ekugcwalisweni ngokweqile, amasekethe amafushane, namaphutha esisekelo esisodwa. Ngemisebenzi yokuvikela ehlakaniphile eminingi, zinikeza ukuvikela okukhethiwe. Ngaphansi kwezimo ezijwayelekile, zingasebenza njengokushintshwa komugqa we-infrequequent. Abaphula amasekethe alinganiswe ngaphansi kwe-1250A bangasetshenziswa ku-AC 50HZ, amanethiwekhi we-380V okugcwala ngokweqile kwezimoto nokuvikelwa kwesikhashana esifushane.

Ngaphezu kwalokho, abaphukile be-Air Circuit Aids bavame ukusetshenziswa lapho kushintshwa okuphambili kweTransformer 400V Side Outlong Lines, ukushintshwa kwebhasi le-Bus, ukushintshwa kwamandla amakhulu okuphakelayo kwamandla, kanye nokushintshwa kokulawulwa kwezimoto okukhulu.

(2)I-Consed Case Breaker Breaker (MCCB)

AbakwaBeli Relictuit Breakers ababunjiwe, abaziwa nangokuthi abaphukileyo bezesifunda yohlobo lwedivayisi, babe nama-terminals bangaphandle, amakamelo okucisha i-ARC, amayunithi okuhamba, kanye nezinqubo zokusebenza ezigcinwe ngaphakathi kwegobolondo lepulasitiki. Oxhumana nabo abasizayo, uhambo olungaphansi kwama-undervoltage, nohambo lwe-shunt lungamamoshumu, okwenza isakhiwo sibe nzima kakhulu. Ngokuvamile, ama-MCCB awabhekwanga ukulungiswa futhi asetshenziswa njengokushintsha okuvikelayo kwemibuthano yegatsha. Ngokuvamile bafaka amayunithi wohambo lwe-thermal-magnetic, ngenkathi amamodeli amakhulu angafaka izinzwa zohambo oluqinile.

Abaphula amacala ababunjiwe beza namayunithi wohambo lwe-electromagnetic kanye ne-elekthronikhi. I-Electromagnetic McCCBS ayikhethi ngokuvikelwa isikhathi eside nangesikhathi esisheshayo. I-Electronic McCBS inikeza isikhathi eside, isikhathi esifushane, isikhathi esisheshayo, nokuvikelwa kwephutha lomhlaba. Amanye amamodeli amasha we-elekthronikhi ama-elekthronikhi afaka imisebenzi yokuqoka yokukhetha indawo.

I-MCCBS ngokujwayelekile isetshenziselwa ukulawulwa kokuphakelayo kokusabalalisa kanye nokuvikelwa, njengokushintshwa okuyinhloko kwemigqa ephumayo ephansi yamandla ama-voltage ama-transformers amancane, futhi njengokushintshwa kwamandla emishini yokukhiqiza ehlukahlukene.

(3) I-Miniature Circuit Breaker (MCB)

Ama-Breakers wesekethe amancane amadivaysi asetshenziswa kakhulu okuvikela ama-terminal ekwakheni amadivayisi wokusatshalaliswa kukagesi. Zivikela emasekethwa amafuphi amafushane, zigcwele ngokweqile, kanye nokugcwala ngokweqile ezinhlelweni zodwa kanye nezigaba ezintathu, zitholakala ku-1p, 2p, 3p, kanye nokucushwa kwe-4P.

IMCBSHlanganisa izindlela zokusebenza, oxhumana nabo, amadivaysi okuvikela (amayunithi ahlukahlukene ohambo), kanye nezinhlelo zokucima ama-ARC. Oxhumana nabo abaphambili bavaliwe noma bavaliwe ngogesi. Ngemuva kokuvalwa, indlela yokuhamba yamahhala ikhiya oxhumana nabo abaphambili endaweni evaliwe. I-Coil Comb Unit Coil kanye ne-Thermal Trip Unit element axhunyiwe kuchungechunge nomjikelezo ophambili, ngenkathi ikhoyili yohambo lwe-unit olungaphansi lixhumeke ngokufana namandla kagesi.

Ekwakhiweni kwesakhiwo sesakhiwo sokuhlala, ama-MCBS asetshenziselwa ukugcwala ngokweqile, umjikelezo omfushane, overcoltage, ama-voltage, ukuvuza kwamandla okuzenzakalelayo, nokusebenza okuzenzakalelayo kwemoto okuzenzakalelayo nokusebenza.

Amapharamitha asemqoka we-Circuit Breakers

(1) Amandla okusebenza alinganiselwe (UE)

Amandla okusebenza alinganiselwe alinganiselwe yi-voltage ephakeme lapho umfutho wesifunda angasebenza khona ngokuqhubekayo ngaphansi kokusetshenziswa okujwayelekile kanye nezimo zokusebenza.

E-China, amazinga kagesi angu-220kv nangaphansi, i-voltage ephezulu kakhulu yokusebenza yi-1.15 ama-system alinganiselwe; Nge-330KV nangaphezulu, kungu-1.1 izikhathi eziyi-1,1 the volute volitage. Abaphula umjikelezo kumele balondoloze ukufakwa ku-voltage okuphezulu kakhulu kohlelo futhi basebenza ngaphansi kwezimo ezibekiwe.

(2) Kukalwe njengamanje (ku)

Amanje alinganiselwe yiwona njengamanje ukuthi iyunithi yohambo ingaqhubeka ngokuqhubekayo ekushiseni okukhona ku-40 ° C noma ngaphansi. Kwabaphukileyo besekethe amayunithi wohambo aguqukayo, kuyinto ephezulu yamanje iyunithi yohambo olungathwala ngokuqhubekayo.

Lapho isetshenziswa emazingeni okushisa aveent ngenhla kwe-40 ° C kepha ayidluli ku-60 ° C, umthwalo ungancishiswa ukuze usebenze ngokuqhubekayo.

(3) Ukulayisha ngokweqile kohambo lokuhlelwa kwamanje (IR)

Lapho okwamanje kudlula uhambo lwamanje lohambo (i-IR), uhambo lwesekethe lokujikeleza ngemuva kokubambezeleka. Iphinde imele inani eliphakeme lamanje i-Breaker Breaker engamelana ngaphandle kokuphakama. Leli nani kufanele libe likhulu kunomthwalo omkhulu wamanje (i-IB) kodwa ngaphansi kwesilinganiso esivunyelwe yi-Circuit (iz).

Amayunithi wohambo lwe-Thermal ajwayele ukulungiswa ngaphakathi kwe-0.7-1.0in, ngenkathi amadivaysi kagesi enikeza uhla olubanzi, imvamisa ngo-0.4-1.0in. Amayunithi wohambo olungaguquki olungaguquki, i-IR = in.

(4) Uhambo olufushane lokujikeleza lwe-unit yunithi yamanje

Amayunithi we-Short-Circuit Uhambo (Njalo noma isikhashana sokubambezeleka) Uhambo lokujikeleza kwesifunda ngokushesha lapho kwenzeka amaphutha aphezulu. Umkhawulo wohambo yi-Im.

(5) Kukalwe isikhathi esifushane sokumelana namanje (iCW)

Leli yinani lamanje i-Breaker Breaker engathwala isikhathi esibekiwe ngaphandle kokubangela ukulimala komshayeli ngenxa yokubhema ngokweqile.

(6) umthamo wokuphuka

Umthamo wephula umthetho uyikhono lokuphula umjikelezo ophazamisa ngokuphepha ama-Curturents, kungakhathalekile ukuthi kulinganiswe kanjani. Ukucaciswa kwamanje kufaka phakathi i-36ka, 50Ka, njll. Ihlukaniswe ngokuvamile ibe umthamo wokuphuka kwesizungu esifushane (i-ICU) kanye nesevisi ye-Short-Circuit Crealing Crealing Pop (ICS).

Izimiso ezijwayelekile zokukhetha ama-Breaker Breaker

Okokuqala, khetha uhlobo lwe-Breaker Breaker kanye nezigxobo ezisuselwa kuhlelo lwayo. Khetha okukalwe okulinganiselwe ngokusekelwe ku-Supimular East Work yamanje. Khetha uhlobo lweyunithi yohambo, izesekeli, kanye nokucaciswa njengoba kudingeka. Izidingo ezithile zifaka phakathi:

I-voltage ekhiqizwayo yokusebenza kwe-Breaker Breaker kufanele kube ≥ ≥ kagesi olinganiswe ngomugqa.
Umthamo wokuphuka kwesikhashana esilinganiselwe kufanele ube ≥ umthwalo obaliwe wamanje welayini.
Umthamo olinganiselwe wesikhashana wesikhashana kufanele ube ≥ umjikelezo omfushane wesizungu ongenzeka emgqeni (ovame ukubalwa njenge-RMS).
Iphutha lesigaba esisodwa se-Ground lisendaweni esekupheleni komugqa kufanele kube ≥ izikhathi eziyi-1.25 ukulungiswa kwamanje kwesikhashana kwe-breaker yesekethe.
I-voltage ye-unit ye-unit ye-unit ye-undervoltage kufanele alinganise i-voltage kamugqa.
I-volunt yohambo lwe-shust yohambo lweyunithi kufanele alingane namandla okulawulwa kwamandla okulawula.
I-voltage yemoto ye-motor drive mechated ilinganiswe kufanele alingane namandla okulawulwa kwamandla okulawula.
Ngemibuthano yokukhanyisa, ukusetha iyunithi yohambo olusheshayo ngokuvamile kuvame ukuthi umthwalo wamanje.
Ukuze uthole ukuvikelwa okukodwa kwesikhashana kwe-motor, iyunithi yohambo olusheshayo okulungiselelwa khona okukhona manje kufanele kube yi-1.35 Times (DW Series) noma izikhathi eziyi-1.7 (DZ uchungechunge).
Ukuze uthole ukuvikelwa okuningiliziwe kwe-motors motors
Uma isetshenziswa njenge-Low-Voltage Side Shintshana Shintshana Lama-Transformers okusabalalisa, umthamo wesekeli wesekethe kufanele weqe i-Transformer's Low-Volfage Side, i-Transformer's Low-Volfage Side, kanye nokuvikelwa kohambo okuyisikhashana akufanele kube khona izikhathi eziyi-6-10 Ukusetha okukhishwe ngokweqile kwamanje kufanele kulingane ne-Transformer's Card yamanje.
Ngemuva kokukhetha i-Type Breaker Breaker kanye nesilinganiso, hlela izici zokuvikela ngokushintshwa kwe-Upstream kanye ne-Downstream ukuvikela ukuphuma ngokweqile nokwandisa ibanga lephutha.

Ukukhetha kwe-Circuit Breaker

Ezinhlelweni zokusabalalisa, abaphukileyo besekethe bahlukaniswa ngokusekelwe ekusebenzeni kwabo kokuvikela kube izinhlobo ezikhethiwe nezingakhethi. Abaphula umjikelezo wokukhetha abasezingeni eliphansi banikela ngokuvikelwa kwezigaba ezimbili nokuthathu. I-NUMA NONYAKA NESIQINISEKISO ZESIKHATHI ESISHA SESIVIVINYO SESIVIVINYO, NGESIKHATHI NGESIKHATHI ESIPHELELE ISIKHATHI SOKUTHOLAKALA KAKHULU UKUVIKELA. Abaphukileyo besekeli abangakhethi ngokuvamile basebenza ngaso leso sikhathi, bahlinzeka ngokuvikelwa okufushane kuphela, yize abanye bebambezele isikhathi eside ngokuvikelwa ngokweqile. Ezinhlelweni zokusabalalisa, uma i-Upstream Circuit Breaker ikhethiwe, futhi i-Downstream Breaker ayikhethiwe noma i-Serfered Delay-tinity youthi yokubambezela isenzo noma izikhathi zokulingisa ezahlukene ziqinisekisa ukukhetha.

Lapho usebenzisa umfutho wesifunda okhethiwe, cabanga ngawo:

Ukuthi ngabe i-Downtrum Breaker ikhethiwe noma ayikhethiwe, i-Upstream Circuit Breaker Skerer Ukuhlelwa kohambo ngokuvamile kufanele kungabi ngaphansi kwezikhathi eziyi-1.1 zokuphuma kwe-towstream autreser the short-breaker shopres ezintathu zamanje.
Uma i-Downstream Breaker ingakhethi, vimbela ukubambezeleka kwe-Upstream isikhathi esingumuntu ovuthayo kusuka ekutholeni kuqala lapho kuvela khona isifunda esifushane lapho kuvikelwe umjikelezo olwanele ngenxa yokuzwela kwesenzo esinganele ngaso leso sikhathi. Ukulibaziswa kwe-Upstream Breaker Isikhathi sokuzibaleka kwe-Overcurrent Unputhitho we-Unity
Uma i-Downtrum Breaker ikhetha futhi, qinisekisa ukukhethwa ngokusetha isikhathi se-Upstream Breaker Isikhathi sokubambezeleka okungenani nge-0.1s isikhathi eside kunesikhathi sokubambezeleka kwesenzo sokubambezeleka kwesehlakalo seBreaker Ngokuvamile, ukuqinisekisa isenzo esikhethiwe phakathi kwabaphuluki be-Upstream ne-Dowstream Low-Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage Voltage, futhi isenzo sayo samanje kufanele okungenani sibe neleveli eyodwa yohambo lwamanje, i-IOP.12IOP.2IOP.2.

Ukuvikelwa kokugcina kwabaphuluki besekeli

Ekwakhiweni kwesistimu yokusabalalisa, ukuqinisekisa ukuhlanganiswa okukhethiwe phakathi kwabaphuluki besekeli kanye ne-DownTream Breaker kubandakanya "ukukhethwa, ukushesha, nokuzwela."

Ukukhetha kuhlobana nokuxhumana phakathi kwama-Upstream and Downstream Breakers, ngenkathi ijubane nokuzwela kuncike kwizici zedivayisi yokuvikela kanye nemodi yokusebenza yomugqa.

Ukudidiyela okufanele phakathi kwe-Upstream kanye ne-Downstream Breaker kuhlukanisa umjikelezo wephutha, ukuqinisekisa ukuthi eminye imibuthano engeyona yezezimali ohlelweni lokusabalalisa iyaqhubeka nokusebenza ngokujwayelekile. Izinhlobo ezingalungile zokuxhumana zabaphuluki besekeli

Isikhathi sePosi: Jul-09-2024