Iindidi zabaphulaphuli zesekethe

(1) I-Wortic Wesekethe Wesekethe (i-ACB)

Abaphulaphuli besekethe bomoya, kwasaziwa njengabaphulaphuli besekethe, banazo zonke izinto ezigcinwe kwisimo sentsimbi ye-insulid. Zihlala zivaliwe kwaye zinokufumana iziqholo ezahlukeneyo, zisenza ukuba kube lula ukutshintsha abafowunelwa kunye neenxalenye. Iqhelekile isetyenziswa njengokutshintsha okuphakathi komthombo wamandla ukuphela, babonisa ixesha elide, ixesha elifutshane, babekho ngokukhawuleza, kunye nokukhusela isiphoso somhlaba. Ezi seti zinokulungiswa ngaphakathi kuluhlu oluthile ngokusekwe kwinqanaba lesakhelo.

Abaphulaphuli besekethe balungele i-AC 50hz, amathuba okusasazwa kwe-380v kunye ne-660v, kunye ne-curres avela ku-2004 ukuya kwi-6300A kwinethiwekhi yothungelwano. Ngokuyintloko basetyenziswa ukusasaza amandla ombane kunye nokukhusela iziphene zombane kunye nezixhobo zamandla ezivela kumthwalo omkhulu, i-onvllstage, imijikelezo emifutshane, kunye neziphoso zesigaba esinye. Ngemisebenzi emininzi yokhuselo ekhukhumeleyo, babonelela ngokhuseleko olukhethiweyo. Phantsi kweemeko eziqhelekileyo, banokusebenza njengokutshintshwa kwentambo. Abaphulaphuli besekethe abayekele imali engaphantsi kwe-1250 banokusetyenziswa kwi-AC 50hz, uthungelwano lwe-380v lwemizila yokulayisha kunye nokukhusela kwisekethe.

Ngapha koko, abaphulaphuli besekethe bomoya bahlala rhoqo njengokuguqula okuphambili kwi-Translamer 400v ecaleni kwendawo yokuphuma, i-tie yebhasi, ukutshintshela kwebhasi enkulu, kunye nokutshintsha kwemoto enkulu, kunye nokutshintshwa kweemoto ezinkulu, kunye nokutshintsha kwemoto enkulu, kunye nokutshintsha kwemoto enkulu, kunye nokutshintsha kwemoto enkulu, kunye nokutshintshwa kwemoto enkulu, kunye nokutshintshwa kweemoto ezinkulu.

(2)Umphunga wesekethe oBuhlungu (MCCB)

Ababumba abatyhidiweyo betyala, kwasaziwa njengabaphulaphuli besekethe, banamagumbi angaphandle, ukucima amagumbi, iiyunithi zohambo, kunye neendlela zokusebenza, kunye neendlela zokusebenza ezigcinwe kwiqokobhe leplastiki. Abafowunelwa abancedisayo, i-ringslstage yohambo, kwaye i-SHunt TRIPS i-modlar, esenza isakhiwo se-compact. Ngokubanzi, ii-MCCB aziqwalaselwanga ngolondolozo kwaye zisetyenziswa njengokutshintshiselana kwimijikelezo yesebe. Ngokwesiqhelo baquka iiyunithi zohambo lwe-thermal-magnetic, ngelixa iimodeli ezinkulu zinokubonisa iinzwa zohambo olunamandla.

Abatyhidiweyo besekethe ababuhlungu beza neeyunithi zohambo lwe-electromagnetic kunye ne-elektroniki. I-electromagnetic miccbs ayikhethanga ngexesha lexesha elide kunye nokhuseleko lwengozi. I-elektroniki inika ixesha elide, ixesha elifutshane, lethutyana, ikhuseleke kakubi. Ezinye iimodeli ze-MCCB ze-MCCB ze-MCCB zibandakanya imimandla ekhethiweyo.

I-MCCB isetyenziselwa ukuhambisa ulawulo kunye nokukhuselwa, njengokutshintsha kwe-voltage ephantsi ye-voltage ephumayo yabaguquli abancinci, kwaye njengamanzi atshintshiweyo abafundi abahlukeneyo bemveliso.

(3) Umphula wesekethe omncinci (MCB)

Abaphulaphuli besekethe omncinci zezona zixhobo zisetyenziswa ngokubanzi zisetyenziswa ekwaziseni i-terminal yesiphelo ekwakheni izixhobo zokuhambisa zombane. They protect against short circuits, overloads, and overvoltage in single-phase and three-phase systems, available in 1P, 2P, 3P, and 4P configurations.

McbsIbandakanya iindlela zokusebenza, abafowunelwa, izixhobo zokukhusela (iiyunithi ezahlukeneyo zohambo), kunye neenkqubo zokucima i-ArC. Abafowunelwa obuphambili bavaliwe ngombane okanye benziwe ngombane. Emva kokuvala, indlela yokuhamba yasimahla ivala abafowunelwa abaphambili kwindawo evaliweyo. I-Overcuright yohambo olugqithisileyo kunye necandelo lokuhamba nge-termal ixhunyiwe kwisekethe eliphambili, ngelixa i-calvoltage yeyunithi ye-Intervoltage ixhunyiwe ngokuhambelana nombane.

Kwindawo yokuhlala yoyilo lombane, i-MCBs isetyenziselwa ukugcwala, isekethe emfutshane, ngaphezulu, i-overvlltage, i-voltage, ukuvuselelwa, ukuvuselelwa kwemidlalo eguqukayo kunye nokusebenza.

Iiparamitha eziphambili zabaphulaphuli zesekethe

(1) I-Vials eSebenzayo (ue)

I-voltage yokusebenza esebenzayo yi-voltage efanelekileyo apho umphunga wesekethe asebenza kuwo ngokuqhubekayo ukusetyenziswa okuqhelekileyo kokusetyenziswa kunye neemeko zomsebenzi.

E-China, kumanqanaba eqhwa nge-220KV nakweli-14 i-Voltage eSebenzisayo yi-1.15 amaxesha okwenziwe kwi-voltage; Kwi-330KV nangaphezulu, ngu-1.1 amaxesha oqingqiweyo. Abaphulaphuli besekethe kufuneka bagcine i-interfation kwindawo esebenzayo yenkqubo kwaye isebenza phantsi kweemeko ezichaziweyo.

(2) I-2) IYAQHUTYELWA NGOKU

I-Rated okwangoku ukuba iyunithi yohambo inokuqhubeka ngokuqhubekayo kwi-40 ° C okanye esezantsi. Abaphulaphuli besekethe abaneyunithi yotshintsho, yeyona ndawo iphambili kuyo iyunithi yohambo inokuphatha ngokuqhubekayo.

Xa isetyenziswa ngamaqondo obushushu aphezulu ngaphezulu kwe-40 ° C kodwa engagqithanga kwi-60 ° C, umthwalo unokuncitshiswa ukusebenza okuqhubekayo.

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Xa i-Ofisi yangoku idlula iYunithi yoTshintsho Ikwamele iyona nqanaba iphezulu lesekethe enokumelana nokuhamba. Eli xabiso kufuneka libe likhulu kunowona mthwalo uphezulu wangoku (ib) kodwa ungaphantsi kwelona liphezulu livunyelweyo yisekethe (IZ).

Iiyunithi zohambo lwe-termal zihlala ngaphakathi kwe-0.7-1.0in, ngelixa izixhobo ze-elektroniki zibonelela ngoluhlu olubanzi, ngesiqhelo i-0.4-1.0in. Kwiiyunithi zohambo olungaguqukiyo olungaguqukiyo, i-IR = ngaphakathi.

(4) IYunithi yohambo olufutshane

Iiyunithi zohambo lwesekethe ezimfutshane (ukulibaziseka ngokukhawuleza okanye ixesha elifutshane) uhambo lokuqhekeka kwisekethe ngokukhawuleza xa kusenzeka imijelo ephezulu. Umjelo wohambo yim.

(5) ikalwe ixesha elifutshane kunye nexesha elifutshane (i-ICW)

Eli lixabiso langoku lesaphuli sesekethe elinokuthwala ixesha elichaziweyo ngaphandle kokubangela umqhubi wothumo ngenxa yokuthatha inxaxheba kakhulu.

(6) Ukwahlula amandla

Umthamo ophulayo kukukwazi ekuphumeni kwesekethe yokukhusela ngokukhuselekileyo, nokuba kungabikho kwangoku. Iinkcazo zangoku zibandakanya i-36K, ye-50, njl njl. Ikhula ngokubanzi yesekethe yesekethe yesekethe (i-ICU) kunye nenkonzo yesekethe yesekethe (i-ICS).

Imigaqo ngokubanzi yokukhetha iisekethe

Okokuqala, khetha uhlobo lomakhi lwesekethe kunye nezibonda ezisekwe kwisicelo sayo. Khetha i-Rated okwangoku ngokusekwe kubuninzi bexesha langoku. Khetha uhlobo lweyunithi yohambo, izixhobo, kunye neenkcazo njengoko kufuneka. Iimfuneko ezithile ziquka:

I-voltare yesekethe yesekethe yesekethe ifanele ibe ≥ i-voltage ye-voltage.
Umthamo wokuqhekeka okufutshane kwisekethe kufuneka ukuba ube ngumthwalo okutyunjiweyo welayini.
Umthamo wokuqhekeka okufutshane kwisekethe kufuneka ube ≥ Owona mncinci wesekethe kwaye unokwenzeka emgceni (ubalwa ngokubanzi njenge-RMS).
Impazamo yenqanaba lesigaba esinye esiphelweni somgca kufuneka sibe yi-1.25 amaxesha ukuphinda-phinda (ukulibaziseka kwexesha elifutshane) Ukutshekishwa kwangoku komgangatho wesekethe.
I-Intervoltage yeYunithi ye-Devervoltage ye-voltage ilingane ne-voltage ye-volthi ephakathi.
I-SHunt Trant yeYunithi ye-SHunt ye-SHITAT kufuneka ilingane ne-voltage yoMsebenzi woLawulo lwaMandla.
I-volsim yenkqubo yokuqhuba yemoto yemoto yenkqubo yokusebenza kufuneka ilingane ne-voltage yolawulo lwamandla.
Kwisekethe yokukhanyisa, iyunithi yecandelo le-testimane
Ukhuseleko lwesekethe enye, iyunithi yecandelo lezetatalo ye-testimane kunye ne-135 (Grice Grice) okanye i-1.7 amaxesha (i-DZ) i-thrict yangoku.
Iimoto zesekethe ezininzi, ukhuseleko lwesekethe olumfutshane, iyunithi yecandelo lezezimfutshane zohambo ezikhoyo kufuneka zibe ngu-1.3 amaxesha okuqala okokuqala kunye nokusebenza kwangoku nakwezinye iimoto.
Xa isetyenziswa njengeyona ndlela iphambili ye-voltage ye-windows yokutshintsha kweenguqu zokuhambisa, isikhundla sokwaphula isaphulelo sesekethe kufuneka sibe ngaphezulu kwe-volloged ephantsi, kwaye iyunithi yoKhuseleko lwesekethe ayifanelanga ukuba ibe yimizuzu engama-6 ukuya kweli-10. Ukuseta okungaphezulu kokukhusela okwangoku kufuneka kulingane ngokulinganayo kwefestile.
Emva kokukhetha ukukhetha uhlobo lwesekethe kunye nokulinganisa, ukulungelelanisa iimpawu zokhuselo kunye ne-upstream kunye ne-Dowstream kunye ne-dowwstream yokutshintsha ukunqanda ukuya phambili kwaye kwandise uluhlu lwempazamo.

Ukukhetha ukuqhekeza isekethe

Kwiinkqubo zokuhambisa, abaphulaphuli besekethe bahlelwa ngokusekwe kwintsebenzo yokhuseleko kwizinto ezikhethiweyo nezingakhethiyo. Ukhenketho lwesekethe olusezantsi lwe-Voltage ibonelela ngenqanaba lesibini kunye nokukhuselwa kwinqanaba elithathu. Impawu zokungenisa ngokukhawuleza kunye nexesha elifutshane lokulinganisa isuti yesekethe, ngelixa ixesha elide lokulibaziseka kwempawu Abaphulaphuli besekethe abangakhethi buso ngokubanzi, babonelela ngokhuseleko lwesekethe, nangona abanye balibazise ixesha elide ngokulibazisa ukhuseleko. Kwiinkqubo zokuhambisa, ukuba umphulisi wesekethe oPhezulu uyakhetha, kwaye i-Dowyream Breaker ayikhethanga okanye ifundwa, ixesha lokuKhangela ixesha elifutshane lohambo okanye amaxesha olibaziselweyo aqinisekileyo yokukhetha ukukhetha.

Xa usebenzisa isaphuli sesekethe esikhanyayo, cinga:

Whether the downstream breaker is selective or non-selective, the upstream circuit breaker's instantaneous overcurrent trip setting should generally be no less than 1.1 times the downstream breaker outlet's maximum three-phase short-circuit current.
Ukuba i-Downream Breaker ayikhethanga, thintela ixesha eliphakamileyo lokulibazisa iyunithi yohambo olwenziweyo xa kusenziwa kuqala isiphaluka esikhuselweyo sesenzo sokusebenza. Ukulibaziseka kwexesha elifutshane lexesha eliphakamileyo le-Trainer ngokuThengisisa iYunithi yeThutyana yeThando akufuneki kungabikho ngaphantsi kwe-1.2 amaxesha abenziweyo obungaphantsi kweYunithi yeYunithi yeYunithi.
Ukuba i-Dowream Breaker ikwakhetha, qinisekisa ukukhetha ngokumisela ixesha lokutshata kwexesha elifutshane lexesha elifutshane kakhulu ubuncinci ubuncinci bexesha elincinci lokwenza ixesha eliphantsi. Ngokubanzi, ukuqinisekisa intshukumo ekhethiweyo phakathi kwe-upstream kunye ne-Dowstream ephantsi ye-Voltage, i-Wortream Breaker kufuneka ibe nenqanaba le-ortied eliqinisekileyo lokuhamba, kunye nezenzo zalo ezikhoyo kufuneka zibekwe kwicandelo le-hambo eliphezulu, qinisekisa i-IOP.2.2.2iop.2.

Ukukhusela ukukhathaza kwabaphulaphuli besekethe

Kuyilo lwenkqubo yokuhambisa, ukuqinisekisa ukulungelelaniswa okukhethiweyo phakathi kwe-upstream kunye ne-Dowstream yesekethe kubandakanya "ukukhetha, ukukhawulezisa, isantya, kunye nemvakalelo."

Ukukhetha ukuthengiswa kolungelelwaniso phakathi kwe-upstream kunye ne-Downsterreamblers, ngelixa isantya kunye nemvakalelo ixhomekeke kwiimpawu zesixhobo sokukhusela kunye nendlela yokusebenza yomgca.

Unxibelelaniso olufanelekileyo phakathi kwe-upstream kunye ne-Downsterream Brikers ngokukhethekileyo iSekethi yeNtlalontle, ekuqinisekiseni ezinye isekethe engenatyala kwinkqubo yokuhambisa Qhubeka nokusebenza ngesiqhelo. Iindidi zolungelelaniso ezingalunganga zabaphulaphuli zesekethe

IXESHA LOKUQALA: UJUL-09-2024