Ukukhetha wamanje ikhebula cross-section - umsebenzi ilula, kodwa unesibopho

ngogesi ngamunye ifanelekela ukuba zifunde ukubaluleka kokuphila umthwalo kulindeleke ku wiring ungakwazi ngokushesha enze ukukhetha ingxenye ikhebula zamanje. Umsebenzi ilula, ifundiswa ukuxazulula noma yisiphi isikhungo iphrofayela lobuchwepheshe, kusukela eyinhloko ephakeme. Kufanele kukhunjulwe ukuthi, ngokukhetha ikhebula, Kungcono ezintweni eziyingozi enkulu ukwedlula e ohlangothini ezincane.

Ngo izitshalo zezimboni zonke izibalo ezidingekayo yenziwa ochwepheshe ezikhethekile ubunjiniyela kagesi, ngakho nemingcele inethiwekhi bazimisela isimiso 'badedele, esinayo ", futhi ubuhle mayelana nezindleko ukunciphisa, neziqondiso lobuchwepheshe. Kukhona ejwayelekile imithetho amadivayisi kagesi lapha, futhi ziqondiswe onjiniyela, okwenza kwesigaba Ukukhethwa ikhebula zamanje. RB (umsakazo ukufaka Imigomo amadivayisi) ziyadingeka ukufunda kagesi-umklami ngamunye.

kuphakama izinkinga lapho abantu abanayo neziqu eyanele, lizame ukwenza ukufakwa noma wiring esikhundleni elulwimini lwabo noma cottage. Ukukhethwa ikhebula cross-section - it unesibopho. Ukwenza ngendlela engalungile, kungaba kakhulu ebhekene kokuba nokwephula ubuqotho usimende ukushintsha wire kushaywa. Mayelana embi kakhulu-case zimo musa ngisho ufuna ukusho uhlobo umlilo.

Ukuze uqonde emiphumeleni yamaphutha ukukhethwa ikhebula kumele ayejwayele imithetho ulula, esekelwe physics esikoleni Yiqiniso.

Ngakho:

I kagesi ukumelana umqhubi ngokuqondile wakhona ubude balo resistivity. I cross-section okunalokho kuyabathinta oda reverse:

R = (ρ x L) / S,

lapho:

• R - ukubaluleka resistivity, kulinganiswa ngo ohms;
• ρ - resistivity, okusho ukuthi, ukumelana umqhubi asendabeni 1 mm kuya ku-1 m nesigaba ^2;
• L - ubude wiring, m;
• S - umqhubi cross-Sectional endaweni mm ^2.

I resistivity kuyahluka phakathi ngezinto ezihlukahlukene. Ngokwesibonelo, i-isiliva, kumayelana 0,016 Ohm x mm ² / m ^2, ngesikhathi i-platinum - 0.1, nokuthi zegolide - 0.02. Nokho, intambo cross-section kokhetho lwamanje kuhilela ukusetshenziswa izinsimbi eziyigugu hhayi (isizathu kucacile).

Manje umthwalo. Ukuze ugweme amaphutha inani lamanje eziyogelezela ku izintambo, kwanele ukuba wazi ifomula okulula umthetho Ohm analo wesifunda umthwalo resistive:

W = U x mina,

lapho:

• W - amandla ulinganiswa Watts;
• U - amapayipi voltage (nakhu 220 volts);
• Mina - Inani lamanje (ampere).

Eqinisweni, i-Volt-Amps bengafani W, kodwa ngokuya izakhiwo, okuyinto ubuswa uhlobo umthwalo asebenzayo (izibani incandescent, heater nokunye. P.), Lokhu umehluko kungenziwa dengwane.

Ukungeza amandla zonke izinto zikagesi, kungenzeka ukusetha inani umthwalo e Watts ezokwenza ukukhethwa esigabeni samanje ikhebula ukwenza.

Khona-ke yonke into ilula. Njengoba igolide noma-platinum izintambo neze isebenzisa ngisho isithakazelo Abramovich kukhona nezinye izinsimbi kwande. Uma kukhethwa senziwa esivuna i ezibizayo ikhebula, ithusi, njalo milimitha square (noma njengoba kwasho Electricians "square") uyakwazi kudlule abafika kwabangu-10 Amps. Esikhathini izakhiwo aluminiyamu nesizotha 8 Amps, kodwa ushibhile.

Njengomthetho, kukhethwa amakhaya phezu ikhebula zamanje cross-section senziwa esivuna usayizi aluminium wire futhi isikwele isigamu (esidayisa) kanye polkvadrata (ukukhanyisa). Zikagesi noma ezinye amakhasimende amandla esiningi zidinga ahlukene ikhebula bushings umqhubi sigaba 2.5 mm ^2.

Kubalulekile ukukhumbula ukuthi sihlanganise wire zethusi aluminium engenakwenzeka. ekugcineni Lokhu kuhlanekezela ilahlekelwa impahla yayo conductive.