Ukukhetha le ntambo cross-kwesigaba - loomsebenzi ulula, kodwa uxanduva

ngogesi nganye ofanelekayo ukufunda ixabiso umthwalo ukulindeleka iintambo nako ukwenza ukhetho a icandelo le ntambo yangoku. Lo msebenzi olulula, kufundiswa ukusombulula naliphi na iziko iprofayile zobugcisa, ukusuka lokuqala ukuya ephakamileyo. Kufuneka kukhunjulwe ukuba, ngokukhetha intambo, oko Kukhethwa ukuba iphutha elikhulu ngaphezu ecaleni ezincinane.

Xa izityalo industrial zonke izibalo edingekayo eyenziwa ziingcali kunye zobunjineli yombane olulodwa, ngoko parameters womnatha sizimisele kumgaqo 'lungisa, ukuba sibe ", futhi eliphezulu malunga neendleko ukunciphisa, ngokuxhomekeke kwimimiselo yobuchwepheshe. Kukho izinga imithetho bezixhobo zombane apha, kwaye zikhokelwa le iinjineli, ukwenza icandelo kukhethwe intambo yangoku. RB (izixhobo zerediyo ufakelo Terms) kufuneka Ukufunda nganye yombane-umyili.

kuvela ubunzima xa abantu abanazo iziqinisekiso ezaneleyo, ezizama ukwenza ufakelo okanye nokufakelwa endaweni ekhayeni labo okanye cottage. Ukukhethwa intambo cross-candelo - elijongene nayo. Ukwenza oko ngempazamo, oko kwi kakuhle ijongene kokuba baphule ingqibelelo udaka kwaye ukutshintsha wire zingaphaphatheki. Malunga-ecaleni okubi meko musa nokuba ufuna ukukhankanya uhlobo ngomlilo.

Ukuze siyiqonde iziphumo iimpazamo ekukhetheni intambo kufuneka bawuqhele imithetho kakhulu elula, ngokusekelwe khosi physics zesikolo.

Ngoko ke:

I zombane kweelana umqhubi kuba umlinganiselo ngqo ubude balo resistivity. I-cross-kwicandelo koko, ichaphazela nabo ukuze reverse:

R = (ρ x L) / S,

apho:

• R - ixabiso resistivity, kulinganiswa ngo ohms;
• ρ - resistivity, ngamanye kweelana umqhubi kwi nesixhobo 1 mm ukuya-1 m kunye necandelo ^2;
• L - ubude iintambo zombane, m;
• S - umqhubi cross-somhlathi indawo mm ^2.

Le resistivity yohlukile phakathi ezahlukeneyo zesinyithi. Umzekelo, isilivere, kuba malunga 0,016 Ohm x mm ² / m ^2, kwi platinum - 0.1, yaye ngegolide - 0,02. Nangona kunjalo, le yangoku ukhetho cable cross-candelo ezingabandakanyi ukusetyenziswa amatye anqabileyo (isizathu sicacile).

Ke kaloku, ukuba umthwalo. Ukuthintela iimpazamo kwi-mali lwangoku, kuya kumpompoza kwi iingcingo leyo, kwanele ukuba ukwazi indlela elula yomthetho Ohm kaThixo ukuba beesekethe umthwalo resistive:

W = U x I,

apho:

• W - amandla kulinganiswa Watts;
• U - mbane ombane (nantsi apha 220 volts);
• I - ixabiso yangoku (ampere).

Enyanisweni, i-Volt-Amps yahlukile W, kodwa ngokubhekiselele kwizakhiwo, nto leyo ilawulwa yi yohlobo umthwalo esebenzayo (izibane ezingqengezelayo, izifudumezi njalo njalo. P.), Lo mahluko unako nokungahoywa.

Ukongeza amandla zonke izixhobo zombane, unako ukubeka isixa umthwalo Watts eziya kwenza ukhetho kwicandelo yangoku intambo.

Ke yonke into elula. Ekubeni igolide okanye iingcingo platinum ngenkankulu isebenzisa nokuba nomdla Abramovich ezinye iintsimbi eqhelekileyo ngakumbi. Ukuba kukhetha ndikwenzileyo ngokunceda ngentambo, ikopolo, zonke millimitha square eninzi (okanye njengoko kuboniswa zombane "isikwere") uyakwazi ukudlula ukuya Amps-10. Izinto zobumnini ze-aluminiyam amps 8 obulula, kodwa Akubizi kakhulu.

Njengoko umthetho, ukhetho izindlu kwi intambo cross-kwesigaba senziwe ngokuthanda kwesiseko sobungakanani wire aluminiyam kunye isikwere nesiqingatha (ephuma) kunye polkvadrata (ukukhanyisa). Isixhobo okanye ezinye abathengi ezidla igunya-ifuna bushings intambo eyahlukileyo icandelo umqhubi yi-2.5 mm ^2.

Kubalulekile ukukhumbula ukuba adibanisa ucingo lobhedu-aluminiyam engenakwenzeka. Ekugqibeleni le linegunya ulahlekelwa iipropati yayo conductive.