Njengoba wire kwesigaba exhunywe phakathi okukhipha futhi

Noma omsebenzi wakhe ehlangene inkonzo kagesi, umane kumele wazi indlela yokwenza ukubala ikhebula cross-section kwamandla. Ngaphandle kwale ungase uhlangane esimweni esingajabulisi lapho muva welula emgqeni umthengi uphumile emgqeni ngenxa umonakalo ezishisayo umqhubi. Ukuze ugweme lokhu, akufanele nje ubokhumbula ukuthi ubukhulu wire namandla zihlobe-, kodwa futhi ukwenza izibalo uma kunesidingo. Ikhono ukukhetha ubukhulu wayefisa babashayeli, kuncike ukusetshenziswa amandla kungaba wusizo ekuphileni kwansuku zonke: isibonelo, ukukhetha siqu ikhebula-agibele amahhashi abo kubhayela kagesi.

usayizi Wire, amandla lamanje kuvunyelwe

Njengoba amafomula kunazo zikagesi abasakwazi eziyinkimbinkimbi, abantu abaningi neze wezwa isidingo ukwenza kokusebenzisa izibalo, uyophetha ngokuthi ingavuli ukuqonda ngaphandle kosizo amandla onjiniyela kulo mkhakha. Eqinisweni, usayizi wire namandla ezihambisana nabaningana amafomula elula. Inkinga kunciphisa ukuze ekutholeni zamanje esiphezulu kanye Ukukhetha olunye umqhubi nge idatha inkomba yomphakathi.

ithiyori

Esikoleni Course Physics kuyaziwa ukuthi i-Ukudlula wamanje ngokusebenzisa impahla conductive ukubangela Ukushisa yayo, okuyinto kuncike endaweni Sectional kanye umqhubi ukumisa (kusobala ukuthi imicu mncane conductive izinwele ukufuthelana ephakeme ukwedlula ipuleti metal). Inani lamanje lwamanje futhi ine umphumela, isb ukwandisa Ukushisa yayo izinqubo babe babubukhulu ngokwengeziwe. Asikhumbule formula yamanje ukubala voltage aziwayo kanye ukumelana. Lisuselwa umthetho zakudala Ohm futhi libukeka mina = U / R, lapho U - volts, R - ukumelana in ohms.

Nokho, kokubili zihlobene le ngxenye wire, namandla? Ngokushesha! Okuningi kahle kuleli cala akasebenzisi umqondo wamandla, namandla (nobuhlobo babo uyoboniswa ngezansi, inikeza ifomula).

Electric amandla abathengi oxhumene nobungako zamanje egeleza ngokusebenzisa umqhubi. Ngokujwayelekile, kubonakala kungaba azimisele kusukela P ifomula = mina U, lapho mina - wamanje e amperes. Asazi acabangele izici amandla (ingxenye esebenzayo noma esisheshayo), kodwa imininingwane eyethulwa kumanele ukukhethwa wire sigaba. It uhlala esigabeni sokugcina - ukucacisa indawo cross-Sectional core ikhebula. Electricians abanolwazi ukucacisa lokhu ipharamitha "by iso", kodwa sincoma usebenzisa ifomula elula ukuthi kuzovimba amaphutha kungenzeka.

umkhuba

Ngekhebula umqhubi ukwahlukanisa kumele zisuswe, eneka insimbi ububanzi kulinganiswa. Ngokulandelayo, ukubaluleka etholwe shintsha ku ifomula S = (3,14 * (d * d)) / 4, lapho d - ubukhulu ngamamilimitha.

It uhlala ukuthatha Umhlahlandlela (PUE), thola itafula kanye ne esigabeni samanje bese ukhetha ikhebula kwesokudla. Futhi uyakucabangela impahla kanye indlela obeka umugqa.

Ngokwesibonelo Life

Ake sithi ufuna ukuxhuma kubhayela 2 kW 220 V Ukusebenzisa ifomula ngenhla ngoba «P», sithola wamanje, kuyoba 9 Amps. Isitolo iyona eshibhe ezimbili-core ikhebula ne babashayeli zethusi ingxenye engu- emelelwa 0.75 futhi 1 mm.kv. Vula umkhombandlela, thola "wiring evulekile". Two-wire cross-section 1 mm.kv. Kungaba ukumelana 16 Amps (GOST-80!), Kanye 0.75 oluhambisana 15 A. Cishe ezimbili ngesikhathi bebeka. Ngakho, kulesi sibonelo, ukusetshenziswa izintambo nge babashayeli zethusi wabonisa eyamukelekayo ngempela. Lokho ixhumeke usayizi wire namandla.