Hauv kev tsim kho lossis kho, tsis yog ib qho khoom ua tiav yam tsis tau tso lossis hloov cov khoom siv hluav taws xob. Thiab ntawm chav kawm, hom ntawm cov cable yog qhov tseem ceeb ntawm kev txiav txim siab. Cov khoom siv cable rau cov xaim sab hauv yuav tsum tsis yog tsuas yog ua tau raws li qhov yuav tsum tau muaj rau qhov siab tshaj plaws tam sim no, rwb thaiv tsev, tso cua sov, tab sis kuj yuav tsum muaj kev nyab xeeb hluav taws.
NYM cable design
Cov khoom siv cable nrov tshaj plaws nyob rau lub sijhawm tsis ntev los no yog NYM cable. Cov lus piav qhia thiab cov yam ntxwv tau muab hauv qab no. Nws muaj ib leeg lossis ntau-xaim tooj liab tam sim no-nqa conductors hauv rwb thaiv tsev ua los ntawm chalk-filled PVC compound. Xim cim ntawm cable cores:
- 2-core - dub, xiav;
- 3-core - ntsuab-daj, dub, xiav;
- 4-core - ntsuab-daj, dub, xiav, xim av;
- 5-core - ntsuab-daj, dub, xiav, xim av, dub.
Lub plhaub sab nrauv yog ua los ntawm chalk-filled PVC compound. Sheath xim - lub teeb grey. Lub plhaub tag nrho yog ntim nrog cov roj hmab extruded chalk-filled.
Marking
hom kev xaiv ntawm cov khoom siv cable muaj cov ntawv NYM, qhia tias:
- N - tus qauv cable (hauv German kev faib tawm);
- YY - PVC rwb thaiv tsev (PVC hauv European txhais lus);
- M - lub xub ntiag ntawm lub plhaub sab nraud.
Ntxiv mus, dhau los ntawm tus hyphen, cov cim J raug siv - muaj cov xaim ntsuab-daj, lossis O - cov khoom uas tsis muaj cov tub ntxhais daj-ntsuab. Tom qab ntawd, tus naj npawb thiab ntu ntu ntawm cov cores, qhov kev khiav hauj lwm voltage yog qhia. peb cores nrog ib tug ntoo khaub lig seem ntawm 2.5 sq. mm rau voltage 0.66 kV.
Nyob rau hauv lub cim ntawm domestic manufacturers uas ua raws li cov kev cai ntawm GOST R 53769-2010, xws li ib tug cable yuav raug cim NYM 3x2.5 ok (N, PE). Ntawm no "o" yog ib lub xov hlau ib leeg (raws li kev xaiv, "m" yog ntau-xaim), "k" yog ib puag ncig, N thiab PE yog xoom thiab tiv thaiv cores.
Feem ntau lawv hais. tsis yog cable, tab sis yog NYM xaim. Cable - yog dab tsi? Cov ntsiab lus uas tau muab rau hauv lub xeev tus qauv nyeem: "Ib yam khoom siv cable uas muaj ib lossis ntau dua insulated cores nyob rau hauv ib lub sheath." Yog li ntawd, nws yog qhov tseeb los hu NYM tsis yog xov hlau, tab sis yog cable.
Main parameters
Kev qhia tshwj xeeb yog qhov tseem ceeb rau ob tus kws tshaj lij thiab DIYers:
- Rated voltage yog 0.66 kV.
- Ua haujlwm kub - ntawm -50 txog +50 0 C.
- qhov ntsuas kub tsawg kawg - los ntawm -5 0 C.
- Yam tsawg kawg ntawm lub vojvoog dabtsi yog khoov - tsis pub tsawg dua 4 cable diameters.
- Service life - 30 xyoo.
- Number of cores - from 1 to 5.
- Ntau yam ntawm cov tub ntxhais hla ntu - los ntawm 1,5 mus rau 35 sq.mm.
- Packing - coils ntawm 25, 50 m lossis ntawm lub nruas ntawm 500 m.
Thiab, tau kawg, qhov tseem ceeb tshaj plaws ntawm lub cable yog nws qhov kev tso cai tam sim no. Nws yog txiav txim siab nyob ntawm tus ntoo khaub lig ntawm cov cores, txoj kev tso, thiab qhov kub ntawm sab nraud. Rau qhov kwv yees kwv yees, koj yuav tsum siv cov ntaub ntawv tabular los ntawm PUE:
| section, mm.sq. | tam sim no, A |
| 3x1,5 | 15 |
| 3x2,5 | 21 |
| 3x4 | 27 |
| 3x6 | 34 |
| 3x10 | 50 |
Nws yuav tsum raug sau tseg tias cov cable tuaj yeem tsim tau raws li European cov qauv (German), GOST, lossis TU (kev qhia tshwj xeeb). Cov tom kawg yog tsim los ntawm cov chaw tsim khoom. Yog li ntawd, cable tsis, xws li rwb thaiv tsev thickness, core cross-section kam rau ua, tej zaum yuav txawv ntawm txawv NYM manufacturers. Cable tshuaj xyuas, nyob ntawm qhov chaw tsim khoom, tau txais ob qho tib si zoo thiab tsis yog li.
Qhov zoo thiab qhov tsis zoo
Zoo li txhua yam khoom, NYM cable kuj muaj nws tus kheej chips. Nws cov yam ntxwv tau piav qhia hauv qab no:
- Cov khoom siv rwb thaiv tsev zoo. PVC compound yog kub-resistant, tsis txhawb combustion, thiab saj zawg zog txaus.
- Yooj yim ntawm kev teeb tsa. Vim yog cov khoom siv mos, lub npog tiv thaiv sab nrauv tuaj yeem raug tshem tawm yooj yim yam tsis muaj kev pheej hmoo ntawm kev puas tsuaj rau lub rwb thaiv tsev ntawm cov khoom siv tam sim no.
- Cov khoom siv hluav taws xob zoo ua los ntawm cov hlau mos tooj liab. Yooj yim rau twist rau kev sib txuas zoo.
- Lub teeb grey xim ntawm lub plhaub sab nraud yog qhov yooj yim heev rau kev kos nrog lub cwj mem lossis lub cim thaum lub sijhawm teeb tsa.
- Long service life, standard 30 years.
- Lub cable tsis pom zoo rau kev teeb tsa sab nraum zoov, nws tsis tiv taus tshav ntuj ncaj qha.
- Tsis sib haum ntawm ntu ntu ntawm cov cores qhia hauv qhov cim. Koj feem ntau hnov "Kuv yuav NYM cable, qhov no yog dab tsi?" Thiab txhua yam yog qhov yooj yim heev: tam sim no kev tsim cov khoom lag luam raws li hom no tau ua tiav ob qho tib si ntawm cov nroj tsuag hauv tsev thiab hauv cov tebchaws nyob sib ze. Thiab deb ntawm txhua tus ntawm lawv ua raws li cov qauv German lossis txawm tias peb GOSTs.
Daim ntawv thov
NYM yog ib lub cable uas nws piav qhia tias nws yog npaj rau ib qho kev txhim kho hauv tsev nkaus xwb. Tsis pub tso rau hauv ib lub nras yam tsis muaj kev tiv thaiv ntxiv. Nws tseem tsis tau tso cai siv lub cable ntawm hom no rau kev sib txuas ncaj qha ntawm cov khoom siv hluav taws xob, hauv cov hlua txuas ntxiv. Cov txheej txheem txheej txheem yog tswj hwm los ntawm cov chaw tsim khoom cov lus pom zoo thiab cov ntaub ntawv tswj hwm kev nyab xeeb ntawm hluav taws xob thiab hluav taws xob. Lub cable tso cai tso rau hauv kab noj hniav thiab cov kab ntawm phab ntsa panels, nyob rau hauv phab ntsa strobes nyob rau hauv ib txheej ntawm plaster, nyob rau hauv hluav taws xob kav thiab ducts. Muaj kev xav tias NYM cables raug tso cai tso rau ntawm phab ntsa ntoo, tab sis qhov no tsis yog li ntawd. Cov kev cai ntawm kev teeb tsa hluav taws xob tau qhia meej meej tias qhov muaj peev xwm qhib tau tso rau hauv cov kav dej lossis cov thawv, thiab muab zais rau hauv cov phab ntsa ntoo - hauv cov kav hlau ntawm ib qho hlau, suav nrog NYM. Kab, duabuas tau muab tso rau hauv qab no yog mounted raug.
Kev xaiv kab
Nyob rau hauv kev lag luam hauv tsev, muaj cov khoom siv cable ntawm cov khoom siv hauv tsev lossis lub Hoobkas "tsis muaj npe". Thaum xaiv, xyuam xim rau lub cim, ib qho loj cable cog ib txwm tso nws lub logo lossis lub npe. Qhov no yog yam tsawg kawg nkaus, tab sis tseem yog ib tug guarantee ntawm zoo.
- Qee zaum cov neeg muag khoom pom zoo siv SHVVP, PVA es tsis yog NYM. Tsis txhob poob rau qhov ua kom yuam kev no: SHVVP thiab PVA yog hlua, thiab NYM yog cable. Cov lus piav qhia tswj hwm thaj chaw sib txawv ntawm lawv daim ntawv thov. Cov hlua - rau kev sib txuas cov khoom siv hluav taws xob hauv tsev thiab cov hlua txuas ntxiv, cable - rau cov hlua ruaj ruaj.
- Siv cov cables nrog peb lub ntsiab ntsuab-daj rau kev tiv thaiv av.
- Thaum xaiv cov kab hluav taws xob, koj tuaj yeem ua raws li cov lus pom zoo: rau lub teeb pom kev zoo - 1.5 sq. mm, rau lub qhov (socket) - 2.5 sq. mm, rau lub qhov cub hluav taws xob nrog lub qhov cub - 4-6 sq..mm
- Yog tias tsis ntseeg txog qhov zoo ntawm cov cable, yuav ib daim me me, 1 meter txaus. Txheeb xyuas cov kab hluav taws xob rau qhov hluav taws xob - qhov rwb thaiv tsev yuav tsum tsis txhob txhawb kev sib tsoo.
- Nws kuj tseem pom zoo kom kuaj xyuas ntu ntu ntawm cov xov hlau. Yog tias koj tsis muaj micrometer, koj tuaj yeem yooj yim qhwv 10 lem ntawm cov hlau liab qab nruj nreem nyob ib ncig ntawm tus cwj mem. Thiab tom qab ntawd ntsuas qhov ntev winding nrog ib tug kav ntev. Muab faib los ntawm 10 muab qhov tseeb txoj kab uas hla ntawm cov hlau.
