Cov tsheb npav hluav taws xob xav tau los txuas tus kheej cov khoom ntawm cov khoom siv hluav taws xob rau hauv ib qho tag nrho.
Definition
Cov log tsheb sib txuas hluav taws xob tso cai rau koj los ua ke tag nrho cov ntsiab lus ntawm kev teeb tsa hluav taws xob rau hauv ib qho. Qhov tseeb, cov no yog cov conductors uas nws tsis kam yog nyob rau theem qis.
Thaum ob peb lub log tsheb sib xyaw ua ke ntawm ib qho, lawv tham txog cov tsheb npav. Raws li txoj cai, lawv tau nruab rau ntawm insulators, uas ib txhij ua haujlwm txhawb nqa. Nws nkaum hauv ib lub thawv tshwj xeeb (channel). Ua tsaug rau qhov no, nws muaj kev tiv thaiv los ntawm ib puag ncig yam. Lub busbar trunking yuav tsum yeej ib txwm resistant rau qhov tshwm sim dynamic thiab thermal loads, surge currents ntawm lub mains.
hluav taws xob busbars muaj nyob rau hauv ntau yam qauv. Rau lawv txoj kev faib ua hom, muaj ntau yam kev faib tawm.
Raws li txoj kev ua tiav, cov log tsheb hloov tau yooj yim thiab nruj yog qhov txawv. Lawv kuj hu ua tiaj thiab tubular. Cov log tsheb yooj yim tsis twist. Lawv yuav tsum tsis txhob muaj qhov siab ntawm lub ntiajteb txawj nqus. Ntxiv mus, qhov degree ntawm nro ntawm tag nrho cov xov hlau yuav tsum yog tib yam. Nyob rau hauv qhov kub ntawm qhov kub, qhov ntev ntawm lub log yuav hloov. Yog li ntawd, cov qauv nruj yog nruabyoog raws jumpers uas yuav tsum tau them nyiaj rau cov kev hloov no. Tsis tas li ntawd, lawv tau nruab nrog kev co dampers.
Ntxiv rau, busbars tuaj yeem raug rwb thaiv tsev lossis tsis yog insulated. Twb tau los ntawm lub npe nws yog tseeb hais tias nyob rau hauv thawj rooj plaub lub log tsheb muaj ib tug rwb thaiv tsev txheej, thiab nyob rau hauv lub thib ob rooj plaub nws tsis.
Kev faib cov log tsheb los ntawm cov duab seem
Raws li cov duab ntawm ntu ntu, busbars tau muab faib ua hom hauv qab no:
Tubular
Rectangular
Boxed
ob txoj kev
3 txoj kev
Square ca log tsheb dissipate cua sov zoo. Lawv siv tau pom zoo hauv lub network nrog lub zog loj tam sim no (los ntawm 2 txhiab txog 4.1 txhiab amperes). Hauv cov xwm txheej zoo li no, lawv tau muab tso ua ke rau hauv pawg ntawm ob peb daim. Qhov no tsim ib lub tsheb npav ob lossis peb txoj kab.
Busbars muaj ntau qhov tsis zoo:
nyuaj rau nruab
Inductive tam sim no uas tsis sib xws
Tsis muaj zog txhua yam
Txo qhov muaj peev xwm txias
Tsawg luv luv Circuit Court kuj
Hauv lub network uas muaj qhov hluav taws xob ntawm 10-35 kilovolts, lub thawv zoo li lub thawv lossis cov khoom tiaj tus tuaj yeem siv tau. Qhov zoo tshaj plaws yog tubular. Nws muaj ntau qhov zoo. Nws yog ruaj thiab ua cua sov zoo. Lub teb hluav taws xob nyob ib puag ncig nws yog faib sib npaug. Vim li no, coronation tsis tshwm.
Tim cov khoom siv log tsheb
Nyob ntawm cov khoom los ntawm qhov twglub log tsheb tau raug tsim, cov log tsheb hluav taws xob hauv qab no yog qhov txawv:
Copper
Aluminium
Steel
Steel-aluminium
Qhov kev xaiv kawg yog cov tub ntxhais ua los ntawm cov hlau galvanized, nyob ib ncig ntawm cov xov hlau txhuas yog twisted.
Aluminium log tsheb muaj qhov zoo hauv qab no:
Resistant rau corrosion
High hluav taws xob conductivity
Lub yuag
lawv tus nqi qis dua lwm hom
Cov qib ductile ntawm txhuas nrog qhov tsawg kawg nkaus ntawm impurities yog siv rau lawv cov khoom. Tsawg alloys ntawm aluminium, magnesium thiab silicon tuaj yeem siv tau. Cov ntsiab lus ntxiv tso cai rau koj kom muaj zog, ductility, elasticity.
tooj liab tuav tuaj yeem muaj txog 99.9% tooj liab. Cov khoom zoo li no tau sau npe M1. Cov qib siv dav yog ShMT thiab ShMTV, uas yog tsim los ntawm qib tsis muaj oxygen. Lawv txawv nyob rau hauv lub degree ntawm softness. Thawj ob tsab ntawv ntawm ShMM thiab ShMT cov cim txhais tau tias "tsheb npav tooj liab". Tsab ntawv "M" uas ua raws li cov khoom muag muag, "T" - nyuaj.
Kev kos rau peb-theem alternating tam sim no
Txheeb xyuas cov ntsiab lus ntawm kev teeb tsa hluav taws xob yuav pab "cov lus qhia", uas tau hais tawm hauv cov xim thiab tsab ntawv xaiv lub log tsheb thiab cov xov hlau. Lawv tsis raug xaiv random. Lawv raug tswj los ntawm cov qauv.
Muaj ob txoj hauv kev rau xim code log tsheb. Thawj qhov txhais tau hais tias qhov cim ntawm hluav taws xob busbars yog siv rau ntawm theemkev tsim khoom. Cov chaw tsim khoom siv rwb thaiv tsev ntawm cov xim sib txawv. Qhov thib ob yog tsim nyog nyob rau hauv rooj plaub uas cov khoom muaj ib tug xim. Hauv cov xwm txheej zoo li no, cov kab xev hluav taws xob muaj xim yog siv los cim cov theem sib txawv.
Thaum muaj peb theem tam sim no, lub cim yuav zoo li no:
Phase A tig daj
Phase "B" yog xim ntsuab
Phase "C" yog xim liab
Tsim tus neeg tsav tsheb
Tus neeg xyuas pib hauv av yog cim PE. Nws yog ib txwm qhia nyob rau hauv daj-ntsuab. Xim mus nyob rau hauv longitudinal kab. Ntxiv mus, kev siv ob xim sib cais yog txwv tsis pub los ntawm GOST. Rau qhov nruab nrab thiab nruab nrab tus neeg xyuas pib (ua haujlwm) cim N, xim xiav yog siv.
Thaum txuas xoom tiv thaiv thiab cov neeg ua haujlwm ua haujlwm, tag nrho peb xim sib xyaw ua ke. Cov cim hauv qhov no zoo li PEN. Tus neeg xyuas pib yog ua los ntawm xiav, thiab thaum kawg thiab ntawm cov junctions ib strip ntawm daj-ntsuab xim yog ua. Tam sim no, cov xim sib txawv kuj tau txais: tus neeg xyuas pib daj-ntsuab nrog cov kab xiav xiav thaum kawg.
Lab ntawv cim
Nyeem daim duab kom raug, txiav txim siab hom tsheb npav lossis xaim yuav pab tsim tsab ntawv. Zoo li cov xim, cov tsiaj ntawv muaj lawv lub ntsiab lus.
Hluav taws xob cov xov hlau thiab cov tsheb npav nrog hloov tam sim no tau txiav txim siab raws li hauv qab no:
L yog tus neeg xyuas pib ntawm ib theem network
L nrog tus lej 1, 2 lossis 3 - tus neeg xyuas pib hauv peb theemnetwork
N - nruab nrab tus neeg xyuas pib (lossis nruab nrab)
M yog tus coj nruab nrab
PE - grounding conductor (protective)
PEN - ua ke nruab nrab conductors (tiv thaiv thiab ua haujlwm)
Nrog rau tam sim no, cov cim yuav zoo li no:
L+ – positive (lossis positive) conductor
L- - tsis zoo (lossis tsis zoo) tus neeg xyuas pib
Tag nrho cov cim thiab cov npe no yog qhov yuav tsum tau ua. Lawv raug tswj los ntawm cov kev cai saws.
Nws nyuaj rau nco ntsoov txhua qhov no ib zaug. Tab sis ib tus kws paub txog hluav taws xob paub txhua yam no. Qhov cim no yuav tso cai rau koj los txiav txim qhov twg thiab qhov twg txuas nrog. Thiab qhov no yuav txaus rau tus neeg yooj yim to taub, piv txwv li, hom tsheb npav yuav tsum muaj rau cov tshuab hluav taws xob. Tej zaum nws yuav xav tau thaum kho cov hlua hluav taws xob hauv tsev. Nws yog ib qho yooj yim los txuas ntxiv qhov chaw rau nws tom qab.
