Nqe Lus Teb Qhov Tseeb ≠ Nominal Section? Kab lus no teb rau koj!

Ntau tus neeg ua haujlwm hauv kev lag luam tsis paub dab tsi yog qhov nominal seem ntawm cable?

Nyob rau hauv qhov tseeb, nyob rau hauv kev lag luam cable, lub cable seem ib feem yuav muab faib ua peb pawg:

1. Nominal sectional cheeb tsam ntawm cable

2. Tsim cov ntu ntu ntawm cable

3. Qhov tseeb ntawm qhov chaw hla ntawm kab

Cia's tham txog kev sib raug zoo ntawm peb qhov chaw hla ntu no, uas teb cov lus nug ntawm qhov nominal cross-section ntawm cable yog dab tsi.

Dab tsi yog qhov tsim qhov ntu ntu ntawm kab hluav taws xob?

Lub cheeb tsam ntawm cov kab hla hla yog ib qho parameter ntawm cable specification. Peb paub tias cov kab lus tshwj xeeb suav nrog cov lej ntawm cov cores, hla ntu loj thiab qhov hluav taws xob ntawm lub cable. Lub cheeb tsam ntawm cov kab hluav taws xob yog hais txog qhov chaw hla ntawm cov kab hluav taws xob. Nyob rau hauv tib cov ntaub ntawv, lub cable cross-sectional cheeb tsam txiav txim lub peev xwm nqa tam sim no ntawm cable, uas yog, npaum li cas tam sim no nws nqa tau. Qhov nominal cross-sectional cheeb tsam, tsim cross-sectional cheeb tsam thiab tiag tiag cross-sectional cheeb tsam ntawm cables tau piav qhia hauv qab no.

Tsim cov cheeb tsam hla ntawm cable (Lus Askiv Lub Npe: Tsim qhov chaw hla ntu), GB50411-2007 code rau kev lees txais kev tsim kho zoo ntawm lub tsev txuag hluav taws xob engineering, 12.2.2:" ntu ntu ntawm cable thiab hlau xaiv rau qhov tsis tshua muaj hluav taws xob faib hluav taws xob yuav tsum tsis txhob qis dua tus nqi tsim, thiab nws cov ntu ntu thiab hluav taws xob tsis zoo ntawm txhua tus neeg xyuas pib yuav tsum tau ua tim khawv, coj mus kuaj thiab xa mus rau kev tshuaj xyuas thaum nkag mus rau qhov chaw" Tus nqi tsim tau hais los ntawm no yog hais txog qhov tsim ntawm qhov chaw hla ntawm kab. Qhov sib txawv ncaj qha ntsig txog qhov tam sim no nqa peev xwm I ntawm cov hlau thiab cable yog tus neeg xyuas pib tsis kam R, tsis yog qhov tseeb ntawm tus neeg xyuas pib. Thaum peb tshuaj xyuas cov qauv tsim lossis ntu nominal ntawm cov xaim thiab cable, peb tshuaj xyuas nws cov nqi tiv thaiv tsis yog ntsuas nws qhov nqi seem.

Yuav tsum tau rau tus neeg xyuas pib hla ntu hauv cov khoom siv hlau thiab cable?

Tam sim no, cov qauv khoom ntawm txhua tus txheej txheem loj ntawm cov xaim thiab cable txais nominal cross-sectional cheeb tsam lossis cov cai tshwj xeeb kom paub qhov txawv ntawm cov neeg siv khoom sib txawv. Piv txwv li, IEC cov qauv (iec60227, iec60245, iec60502, thiab lwm yam), European qauv (en50525, thiab lwm yam.) thiab lub teb chaws cov qauv (GB / t5013, GB / t5023, GB / T12706, thiab lwm yam) siv nominal cross-sectional cheeb tsam ( unit: mm2) raws li txoj cai ntawm tus neeg xyuas pib specifications ntawm txawv seem, thaum American cov qauv (UL758, UL62, thiab lwm yam.) siv AWG specification raws li cov cai. Ntawm lawv, qhov kev ntsuam xyuas ntawm cov kev qhia tshwj xeeb thiab cov lej ntawm cov ntu sib txawv yog xav tau los ntawm tus neeg xyuas pib tus nqi tiv thaiv, es tsis yog qhov ntsuas qhov tseeb ntawm tus neeg xyuas pib qhov chaw hla ntu (Ceeb toom: UL tus qauv tso cai rau kev ntsuas ntawm qhov tseeb ntawm qhov chaw hla, tab sis qhov tseeb ntawm qhov kev ntsuas ntawm tus neeg xyuas pib qhov kev txiav txim siab. conductor kuj yog siv raws li txoj kev arbitration).

Nyob rau hauv lub teb chaws tus qauv GB / t5023-2008, GB / t5013-2008 thiab GB / t12706-2008, nws yog feem ntau hais tias cov cable conductor ua tau raws li qhov yuav tsum tau ntawm GB / t3956. Qhov kev ntsuam xyuas tseem ceeb suav nrog:

1. Qhov siab tshaj plaws txoj kab uas hla ntawm ib lub xov hlau ntawm tus neeg xyuas pib muag thiab qhov tsawg kawg nkaus ntawm ib lub xov hlau hauv cov neeg xyuas pib nyuaj yuav tsum ua raws li qhov yuav tsum tau ua ntawm GB / t3956;

2. Kev tiv thaiv ntawm tus neeg xyuas pib ntawm 20 ℃ yuav tsum ua tau raws li qhov yuav tsum tau ua ntawm GB / t3956.

Nyob rau hauv GB / t3956, muaj plaub hom conductors: hom 1 (khoom conductor), hom 2 (stranded conductor), hom 5 (flexible conductor) thiab hom 6 (conductor softer dua hom 5). Ntawm lawv, thawj thiab thib ob conductors yog siv nyob rau hauv taag cables (xws li tso cov xov hlau, fais fab cables, thiab lwm yam). 5th thiab 6th conductors yog siv nyob rau hauv hloov tau yooj yim cables thiab cords (xws li lub hwj chim kab, roj hmab sheathed cables, thiab lwm yam) thiab kuj yuav siv tau rau tsau nteg.

Ntawm cov saum toj no plaub tus neeg xyuas pib, qhov siab tshaj plaws tus neeg xyuas pib ua haujlwm ntawm 20 ℃ ntsuas los ntawm tus neeg xyuas pib specifications nrog rau qhov sib txawv nominal cross-sectional cheeb tsam yog qhia nyob rau hauv lub rooj. Nws tuaj yeem pom tias muaj kev sib txuas lus ib-rau-ib ntawm tus neeg xyuas pib specifications ntawm txhua qhov nominal cross-sectional cheeb tsam thiab lawv qhov siab tshaj plaws conductor tsis kam. Yog li ntawd, rau cov khoom siv hlau thiab cable, tsuav yog tus neeg xyuas pib tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm qhov siab tshaj plaws tiv thaiv raws li qhov tau thov nominal cross-sectional cheeb tsam, thiab txoj kab uas hla lossis tus naj npawb ntawm ib lub xov hlau ntawm tus neeg xyuas pib ua tau raws li tus qauv yuav tsum tau ua, nws tuaj yeem ua tau. raug txiav txim raws li tsim nyog. Nyob rau tib lub sijhawm, cov ntaub ntawv siv ntsuas ntsuas qhov zoo ntawm txhua tus qauv yog qhov siab tshaj plaws tiv thaiv tus nqi ntawm qhov sib thooj nominal cross-sectional cheeb tsam. Tsuav qhov ntsuas no ua tau raws li qhov yuav tsum tau ua, nws qhia tau tias cov khoom tsim nyog. Yog tias qhov chaw hla ntu me me dhau lawm, tus nqi tiv thaiv yuav tsis tsim nyog. Qhov tseeb, thaj chaw hla ntu kuj raug ntsuas raws li, uas tsuas yog siv, tsis yog kiag li.