Cov khoom siv hluav taws xob niaj hnub no tau nthuav tawm ntawm kev lag luam hauv ntau yam. Ntawm cov khoom zoo li no, VVGng hlau yog tshwj xeeb tshaj yog nrov.
Rau cov neeg uas txiav txim siab ua cov xaim hluav taws xob qis hauv thiab sab nraud, cov kws ua haujlwm paub txog pom zoo siv cov khoom siv hluav taws xob tshwj xeeb no. Cov ntaub ntawv hais txog VVGng hlau thiab nws cov yam ntxwv tshwj xeeb tau nthuav tawm hauv kab lus no.
khoom yog dab tsi?
VVGng xaim yog ib hom VVG fais fab cable, uas yog siv los muab lub zog rau cov khoom siv sab hauv tsev, nrog rau cov kab hluav taws xob sab nraud thiab cov khoom siv hluav taws xob. Structurely, VVG cable (GOST 16442-80) yog sawv cev los ntawm ib los yog ntau tshaj conductive cores, txhua tus yog nruab nrog nws tus kheej insulating txheej. Nyob rau hauv ib lub hwj chim cable, cov cores yog twisted ua ke thiab muaj ib tug ntau insulating sheath.
Abbreviation
Thawj tsab ntawv hauv cov hluav taws xob hluav taws xob qhia cov khoom siv los ntawm cov tub ntxhais ua. Yog tias nws yog txhuas, ces cov ntawv luv ntawm cov hlau no yuav pib nrog tsab ntawv "A". Txij li thaum nws tsis nyob hauv VVG qib, nws txhais tau tias cov cores ntawm tag nrho cov khoom yog tooj liab.
Tsab ntawv "B" qhia txog cov khoom siv los ntawm cov txheej txheem insulating: yas (polyvinyl chloride). Txij li thaum "B" yog nyob rau hauv cov ntawv luv ob zaug, qhov no txhais tau hais tias VVGng hlau (GOST 53762-2010) yog nruab nrog ob chav vinyl rwb thaiv tsev. Polyvinyl chloride yog siv los ua cov hlau winding thiab txheej insulating txheej.
Lub xub ntiag ntawm lub cim "G" hauv qhov kev xaiv qhia tias lub cable tsis muaj cov cuab yeej cuab tam. Vim li no, cov hlau muaj qhov yooj yim txaus, tab sis tib lub sijhawm nws tsis muaj kev tiv thaiv los ntawm cov khoom siv sab nraud.
VVGng thiab VVG xaim yog dab tsi?
Thaum cov khoom siv hluav taws xob tso rau ib leeg, lawv tsis taws. Thaum tso VVGng ua ke nrog lwm cov xov hlau, txhawm rau tiv thaiv kab hluav taws xob, nws raug kho nrog cov tshuaj tiv thaiv tshwj xeeb. Qhov no yog qhia los ntawm lub npe "NG". Rau qhov yooj yim VVG cable, zoo tib yam PVC rwb thaiv tsev yog muab, yog li nws tsis yog tus yam ntxwv ntawm lub xub ntiag ntawm tus kheej-tawm thiab hluav taws-retardant zog.
Nyob ntawm cov xaim
- VVG. Cov qauv yooj yim nrog cov pa PVC rwb thaiv tsev. Hlau tso ua ke tuaj yeem ignite.
- VVGng. Cov txheej insulating yog nruabtshwj xeeb cov tshuaj halogen uas tiv thaiv kab hluav taws xob.
- VVGng Is. Cov hlau yog nruab nrog ib qho insulating sheath ua los ntawm halogen-dawb PVC. Siv hom VVG cable no, hluav taws xob hluav taws xob tau muab faib thiab xa mus rau cov khoom siv uas yog cov khoom siv hluav taws xob zoo sib xws. Vim nws cov yam ntxwv kev txawj ntse, VVGng ls hlau feem ntau yog siv rau hauv qhov chaw uas muaj qhov tshwj xeeb ntawm hluav taws kub. Cov hlau nyob rau hauv lub cim tseem ntxiv nrog rau lub npe (Cov pa taws tsawg).
- VVGng-frls. Cov txheej rwb thaiv tsev ntawm cov hlau no tseem ua los ntawm cov khoom tsis muaj halogen. Lub cable yog hluav taws kub retardant. Thaum cov yas rwb thaiv tsev ntawm cov hlau no smolders, ib qho me me ntawm cov pa taws tawm.
Stands
Lub ntsiab lus no yog lub hauv paus ntawm txhua yam khoom siv hluav taws xob. VVGng hlau yuav muaj ib los yog ntau dua tooj liab conductors. Lawv tus lej txawv ntawm 1 txog 5. Muaj pes tsawg tus neeg nyob hauv lub cable tuaj yeem txiav txim los ntawm nws cov cim. Lawv tus lej yog qhia los ntawm thawj tus lej. Piv txwv li, cov hlau VVGng 3x 2, 5 yog nruab nrog peb tooj liab conductors. Raws li txoj cai, txhua tus ntawm lawv tuaj yeem yog cov hlau sib cais, lossis ob peb, sib tw ua ke.
Koj tuaj yeem txiav txim siab qhov no los ntawm kev kos npe. Lub npe "M" sawv ntawm cov cables uas muaj cov khoom siv tooj liab tso tseg. Hloov pauv, "0" muaj nyob rau ntawm cov khoom tseem ceeb.
Shape
Nyob ntawm seb cov cores tau muab tso rau hauv cov hlau li cas, VVGng cov khoom tuaj yeem yog:
- Round. Cables uas muaj cov cores nrog cov ntu me me muaj qhov zoo li no. Rounded hlau yog cim nrog tsab ntawv "K".
- Segmental, lossis sectoral. Txhua ntawm cov leeg tau muab cov duab ntawm ib feem ntawm cov haujlwm ntawm lub voj voog. Cov xov hlau zoo li no raug xaiv nrog lub cim "C".
- Paj. Hauv cov xov hlau zoo li no, cov cores tau muab tso rau hauv tib lub dav hlau. Cov duab no zoo ib yam rau cov xov hlau uas muaj qhov hla me me.
Section
Hauv VVGng cov khoom siv hluav taws xob, qhov ntsuas no txawv ntawm 1.5 hli square. mus txog 50 mm sq. Tus lej ntawm ntu yog qhia los ntawm tus lej thib ob. Piv txwv li, hauv VVGng 3 x2 5 xaim, cov cores muaj qhov hla ntawm 2.5 mm2. Txawm li cas los xij, tseem muaj cov xov hlau, qhov hla ntawm qhov tuaj yeem yog 400 hli. sq. Txawm li cas los xij, cov cables no tau ua kom xaj. Yog hais tias qhov parameter yog 4 hli square, qhov no tsis tau txhais hais tias tag nrho tsib cores ntawm VVGng hlau muaj raws nraim qhov seem no. 2.5sq ua. mm yog suav tias yog lawv qhov ntsuas pom zoo, txij li ntu ntu ntawm tus neeg xyuas pib nruab nrab thiab tus neeg xyuas pib hauv av feem ntau me dua.
Cov khoom siv nrog qhov ntsuas qhov sib txawv loj dua muaj qhov ua tau zoo tshaj plaws. Conductivity yog ntsuas raws li qhov tsis kam ntawm tus neeg xyuas pib ib txhiab meters ntawm qhov ntev. Piv txwv li, ib tug cable nrog ib tug ntoo khaub lig seem ntawm 1.5 mm2. muaj qhov tsis kam mus txog 12 ohms, thiab cov khoom lag luam nrog ib ntu ntawm 50 mm square. – 0.39 Ohm.
Cov xaim tuaj yeem ua haujlwm yog tias qhov ntev ntawm ib txhiabmeters, nws kuj yuav nyob rau hauv qhov ntau ntawm 7-12 ohms. Qhov ntsuas ntsuas qhov ntsuas kub tsis siab tshaj 20 degrees.
Insulating cover
Lub thickness ntawm cov rwb thaiv tsev yog nyob ntawm qhov tsis xws ntawm cov xaim raws li nws qhov nominal seem thiab qhov voltage uas nws tau tsim. Nrog ib tug cable hla ntu ntawm 16 hli. sq. thiab voltage tsis ntau tshaj 660V, lub thickness ntawm insulating txheej yog 0.9 hli. Yog tias cov hlau no yuav ua haujlwm ntawm qhov hluav taws xob ntawm 2.5 kV, lub rwb thaiv tsev thickness yuav tsum yog 1 hli. Rau hlau VVGng 3x2 5 mm square. ntawm qhov voltage ntawm 0.66 kV, nws yuav tsis tshaj 0.60 hli. Rau kev ua haujlwm ntawm 1 kV, lub nominal rwb thaiv tsev thickness yuav yog 0.70 hli.
Voltage
Ua ntej siv, cov xaim yuav tsum tau kuaj hluav taws xob. Cov khoom, uas yog tsim los ua haujlwm ntawm qhov hluav taws xob ntawm 66 kV, yog thawj zaug sim rau 10 feeb ntawm qhov hluav taws xob ntawm 3 kV. Ib tug xaim ntsuas rau 1 kV yuav tsum tiv taus 3.5 kV.
Bendable
Raws li GOST, txhua lub xaim, nyob ntawm hom, muaj qee yam khoom siv. Cov khoom uas siv stranded conductors tuaj yeem khoov mus rau ib lub vojvoog ntawm 7.5 cable diameters. Cov khoom siv ib leeg tau yooj yim khoov mus rau lub vojvoog ntawm 10 txoj kab uas hla.
Kub
Cov ntsuas ntsuas ntawm nominal kub ntawm cable txawv ntawm -50 txog +50 degrees. Qhov zoo tshaj plaws kub rau hlau installation yog: -15 degrees. Nws tsis pom zoo kom ua hauj lwm nrog cov cable ntawm qhov kub thiab txias. Txwv tsis pub, raws li cov kws kho hluav taws xob, cov khoom lag luam yuav tawg thiab tej zaum txawm tiastawg.
Description of wire VVGng 3x2, 5
Cov khoom lag luam muaj peb lub xov tooj hluav taws xob tooj liab. Polyvinyl chloride yas (PVC) yog siv los ua ib qho insulator. Cov khoom no kuj yog siv los ua winding. Cov hlau ntawm pab pawg tso tsis ignite. Cov khoom no tsis muab nrog kev tiv thaiv npog.
Technical data at 0.66 kV
Cov khoom siv hluav taws xob no ntawm tus nqi hluav taws xob tau teev tseg muaj cov hauv qab no tsis:
- Cov nominal ntu ntawm cov tub ntxhais yog 2.5mm sq.
- Ib kab ib txhiab meters ntev hnyav 135 kg.
- Txoj kab uas hla yog 9.3 cm.
- Cov txheej txheem insulating ntawm cov cores muaj qhov tuab ntawm 0.60 hli.
- Cov khoom tso tseg muaj qhov qis kawg ntawm qhov nkhaus ntawm 7 cm.
- Cov hlau raug ntsuas rau 37 A (hauv av) thiab 28 A (cua).
- Nyob rau hauv rooj plaub ntawm ib tug luv luv Circuit Court, 0.27 kA yog xam tau rau cov hlau.
- Cov hluav taws xob tsis kam ntawm cov txheej insulating tsis tshaj 10 MΩ.
yam ntxwv ntawm cov xaim ntawm qhov hluav taws xob ntawm 1 kV
Nrog rau tus nqi voltage, VVGng 3x2, 5 muaj cov nram qab no tsis:
- Cross section: 2.5mm sq.
- Ib txhiab meters ntev hlau hnyav 144 kg.
- Cov khoom tso tseg muaj qhov tsawg kawg yog khoov lub vojvoog ntawm 0.73 cm, thiab cov hlua ib leeg yog tsim los khoov nrog lub vojvoog ntawm 0.97 cm.
- Y Insulation txheej thickness yog 0.70mm.
- Qhov hluav taws xob tiv thaiv ntawm qhov rwb thaiv tsev ib 1,000 meters yog 10 MΩ.
Hlau yog muag hauv daim ntawv twisted, hauv nruas. Lawv qhov ntev txawv ntawm 500 txog 7200 meters.
Daim ntawv thov
Qhov chaw tso VVGng xaim tuaj yeem yog:
- Kub thiab damp thaj chaw: tunnels, canals, galleries, mines, sewers, industrial cheeb tsam.
- Ib feem dej nyab cov qauv nrog me me, nruab nrab lossis hnyav corrosivity.
- Tshwj xeeb cable racks ntawm blocks thiab txuas hniav.
- Chaw nyob hauv vaj tse thiab pej xeem.
- Hluav taws kub muaj phom sij.
- thaj chaw tawg.
Zaj lus
Lub sijhawm ua haujlwm lav ntawm cov xaim yog tsawg kawg tsib xyoos. Raws li cov neeg siv khoom, VVGng tuaj yeem siv tau ntev dua. Qhov kev thov rau cov khoom siv hluav taws xob no tau piav qhia los ntawm qhov piv ntawm nws cov yam ntxwv siab thiab tus nqi qis.
