Nyob rau hauv niaj hnub fais fab kis thiab faib tshuab, kev xaiv ntawm cov cables yog ib qho tseem ceeb los xyuas kom meej qhov ua tau zoo thiab kev nyab xeeb ntawm lub kaw lus. XHHW hlau (cross-linked polyethylene high temperature heat-resistant cable) yog cov kab hluav taws xob ua haujlwm siab uas tau siv dav hauv cov cheeb tsam hnyav xws li kub, noo noo, thiab tshuaj lom neeg corrosion. Txawm li cas los xij, hauv kev teeb tsa hauv av, cables yuav tsum tau ua kom tau raws li cov kev xav tau ntxiv, xws li dej tsis kam, tiv thaiv corrosion, thiab kev tiv thaiv lub cev. Yog li ntawd, tsab xov xwm no yuav tshawb xyuas seb XHHW cov xov hlau puas tsim nyog rau kev teeb tsa hauv av, thiab txheeb xyuas nws cov yam ntxwv cuam tshuam thiab qhov zoo thiab qhov tsis zoo los pab cov neeg siv xaiv cov kab tsim nyog tshaj plaws thaum xaim hluav taws xob hauv av.
1. Cov yam ntxwv tseem ceeb ntawm XHHW xov hlau
Ua ntej nkag siab seb XHHW cov xov hlau puas tsim nyog rau kev teeb tsa hauv av, peb yuav tsum xub nkag siab lawv cov yam ntxwv thiab kev tsim kho. XHHW cov xov hlau feem ntau yog ua los ntawm tooj liab lossis txhuas conductors thiab cross-linked polyethylene (XLP) ua cov ntaub ntawv rwb thaiv tsev. Cov ntaub ntawv XLP txhim kho lub cev thiab tshuaj lom neeg ntawm polyethylene los ntawm kev sib txuas cov txheej txheem tshuaj lom neeg, ua rau cov kab hluav taws xob ruaj khov hauv qhov kub thiab txias, tshuaj tiv thaiv corrosion thiab qhov chaw ntub dej.
1.1 Kev tsim kho ntawm XHHW Hlau
Tus neeg xyuas pib: Tus neeg xyuas pib ntawm XHHW cov xov hlau feem ntau yog tus neeg xyuas pib tooj liab, uas muaj cov khoom siv hluav taws xob zoo thiab tuaj yeem xa tawm tam sim no zoo. Copper conductors kuj muaj qhov zoo corrosion kuj thiab yog tsim rau siv nyob rau hauv ib co chemically corrosive ib puag ncig.
Cov khoom siv rwb thaiv tsev: Cov txheej rwb thaiv tsev ntawm XHHW cov xov hlau siv cross-linked polyethylene (XLP), uas tsis yog tsuas yog muaj qhov kub thiab txias (tuaj yeem tiv taus kev ua haujlwm kub txog 90 degree), tab sis kuj muaj cov dej tsis zoo, tshuaj tiv thaiv thiab kev tiv thaiv txhua yam.
Sab nrauv: Qee cov XHHW cables kuj tau nruab nrog lub plhaub sab nraud (xws li polyethylene sheath) txhawm rau txhim kho kev tiv thaiv lub cev ntawm cable thiab tiv thaiv kev puas tsuaj rau sab nraud.
1.2 XHHW-2 Cable
XHHW-2 is a upgraded version of the XHHW cable. Ntxiv rau tag nrho cov yam ntxwv ntawm XHHW cable, nws kuj muaj qhov kub thiab txias tsis kam thiab ntau yam kev siv. XHHW-2 cables tuaj yeem ua haujlwm tau ntev hauv ib puag ncig ntawm 90 degree thiab muaj kev tiv thaiv zoo rau cov hluav taws xob ultraviolet, ua rau lawv haum rau qhov chaw sab nraum zoov thiab hauv av.
2. Kev siv ntawm XHHW cov xov hlau nyob hauv av ib puag ncig
2.1 Cov kev cai yooj yim rau cov cables hauv av
Thaum txhim kho cables nyob rau hauv underground ib puag ncig, ib tug series ntawm tshwj xeeb yuav tsum tau xav txog. Cov kab hluav taws xob hauv av yuav tsum tsis yog tsuas yog muaj cov khoom siv hluav taws xob zoo xwb, tab sis kuj tuaj yeem tiv taus sab nraud ntawm lub cev thiab tshuaj lom neeg. Cov kev cai tshwj xeeb muaj xws li:
Dej tsis kam: Qhov chaw hauv av feem ntau yog ntub, thiab cable yuav tsum muaj cov dej zoo tiv thaiv kom tsis txhob muaj cov kab hluav taws xob rwb thaiv tsev los ntawm kev ntub dej thiab ua rau nws cov kev ua haujlwm tsis zoo, lossis tseem ua rau muaj teeb meem kev nyab xeeb xws li luv luv Circuit Court.
Tshuaj corrosion kuj: Underground cables tej zaum yuav raug corrosive kua, gases los yog av, yog li cov cables yuav tsum muaj zog corrosion kuj los xyuas kom meej kev ruaj ntseg mus ntev.
Kev tiv thaiv lub cev: Cov kab hluav taws xob hauv av tuaj yeem ntsib kev puas tsuaj rau lub cev xws li av siab thiab kev poob siab, yog li lawv cov qauv sab nrauv yuav tsum muaj qee qhov compressive zog thiab kav ntev.
Kev ua tau zoo ntawm hluav taws xob: Lub cable yuav tsum muaj kev tswj xyuas zoo thiab kev ua haujlwm rwb thaiv tsev kom tiv thaiv kom tsis txhob muaj hluav taws xob tam sim no lossis hluav taws xob tsis ua haujlwm.
2.2 Qhov zoo ntawm XHHW xov hlau
XHHW cov xov hlau ua tau raws li qhov yuav tsum tau ua ntawm kev teeb tsa hauv av hauv ntau yam, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm kev kub siab, kev tiv thaiv ya raws thiab tshuaj tiv thaiv corrosion, thiab muaj qhov zoo tseem ceeb:
Dej tsis kam: XHHW cables siv cross-linked polyethylene (XLP) raws li cov khoom siv rwb thaiv tsev, uas muaj dej tsis kam. Piv nrog cov tsoos PVC insulated cables, cross-linked polyethylene ntawm XHHW cables tuaj yeem tsis tsuas yog tiv thaiv kev nkag mus ntawm cov dej noo, tab sis kuj tseem muaj cov khoom siv hluav taws xob zoo hauv qhov chaw ntub dej lossis ntub dej.
Corrosion resistance: Txij li XHHW cov xov hlau siv cov ntaub ntawv sib txuas ntawm polyethylene, lawv muaj cov tshuaj tiv thaiv corrosion thiab tuaj yeem siv rau hauv ib puag ncig nrog cov tshuaj muaj zog corrosion, xws li cov nroj tsuag petrochemical, fais fab nroj tsuag thiab lwm qhov chaw uas yuav tsum tau corrosion kuj. Yog li ntawd, XHHW cables yog heev haum rau underground ib puag ncig, tshwj xeeb tshaj yog nyob rau hauv av los yog kua nrog tshuaj erosion.
Kev kub siab ua haujlwm siab: XHHW cables tuaj yeem tiv taus qhov kub thiab txias ua haujlwm ntev thiab tsim nyog rau kev hloov pauv kub uas yuav tshwm sim hauv av. Txawm tias nyob rau hauv qhov kub thiab txias, qhov rwb thaiv tsev kev ua tau zoo ntawm XHHW cables tseem ruaj khov thiab tuaj yeem xa hluav taws xob tsis tu ncua.
Kev tiv thaiv lub cev: Tus ntoo khaub lig-txuas polyethylene txheej txheej ntawm XHHW cable muaj kev tiv thaiv zoo thiab tuaj yeem tiv taus qee qhov ntawm lub cev sab nraud. Qhov no tso cai rau XHHW cable los tiv thaiv kev pheej hmoo xws li av siab thiab kev sib tsoo sab nraud thaum pw hauv av.
2.3 Kev txhim kho ntawm XHHW-2 Cable
Piv nrog rau XHHW cable, XHHW-2 cable muaj qhov kub thiab txias thiab ib puag ncig tiv thaiv. Nws qhov kub tsis kam mus txog 90 degree, yog li nws yog tshwj xeeb tshaj yog haum rau siv nyob rau hauv underground ib puag ncig nrog loj kub hloov. Tsis tas li ntawd, XHHW-2 cable feem ntau muaj zog tiv thaiv hluav taws xob ultraviolet, uas ua rau nws tsis yog siv rau hauv av xwb, tab sis kuj siv rau hauv av uas raug tshav ntuj (xws li tso rau hauv qab choj, qhov av, thiab lwm yam).
2.4 Qhov tsis zoo
Txawm hais tias XHHW cables tsim nyog rau kev teeb tsa hauv av, lawv kuj muaj qee qhov tsis zoo:
Kev tiv thaiv lub cev sab nraud: Txawm hais tias tus ntoo khaub lig-txuas polyethylene ntawm XHHW cables muaj qee lub zog compressive, qee zaum (xws li hauv av tob lossis qhov chaw raug rau sab nraud loj), yuav tsum tau ntsuas kev tiv thaiv ntxiv, xws li ntxiv cov hlua sab nraud lossis siv XHHW armored cable los txhim kho lub cev tiv thaiv lub peev xwm ntawm cable.
Tus nqi siab dua: Piv nrog rau lwm hom cables, XHHW cables feem ntau kim dua. Rau tej yaam num uas nruj pob nyiaj siv, xaiv XHHW cables yuav nce nqi ntxiv.
3. Kev teeb tsa thiab kev saib xyuas ntawm XHHW cables
3.1 Installation ceev faj
Tsim nyog tso qhov tob: txhawm rau txhawm rau ua haujlwm ntev thiab ruaj khov ntawm XHHW cables, nws yog ib qho tsim nyog yuav tsum ua raws li cov txheej txheem kev teeb tsa hauv av thaum txhim kho hauv av kom ntseeg tau tias cov cable tau faus tob txaus kom tsis txhob muaj kev puas tsuaj rau cov kab hluav taws xob vim lub cev sab nraud. cuam tshuam los yog av compaction.
Kev tiv thaiv ib puag ncig: Thaum lub sij hawm kev teeb tsa, tshwj xeeb tshaj yog nyob rau hauv chemically corrosive ib puag ncig, nws yog ib qho tsim nyog los xyuas kom meej tias cov txheej txheem tiv thaiv ntawm XHHW cable tsis puas. Yog hais tias lub cable yuav tsum dhau los ntawm cov cheeb tsam corrosive, xav txog kev siv XHHW armored cable los txhim kho cov kav ntev ntawm cov cable.
Adapting connectors: Cov connectors ntawm XHHW cables yuav tsum tau raws li qhov yuav tsum tau daim ntawv pov thawj ntawm UL CABLE thiab UL44 los xyuas kom meej qhov hluav taws xob kev ruaj ntseg ntawm qhov kev twb kev txuas qhov chaw. Lub sealing thiab dej tsis kam ntawm qhov sib koom ua ke yuav tsum tau ua kom ntseeg tau thaum lub sijhawm teeb tsa.
3.2 Cov lus pom zoo txog kev saib xyuas
Tsis tu ncua xyuas cov txheej txheej ntawm lub cable: Tsis tu ncua xyuas seb lub txheej txheej ntawm lub cable puas yog mechanically puas los yog laus. Rau cov kab hluav taws xob hauv av uas yuav tsum muaj kev tiv thaiv lub cev, xav txog kev hloov cov ntaub qhwv sab nrauv tsis tu ncua, tshwj xeeb tshaj yog nyob rau hauv qhov chaw muaj corrosion.
Saib xyuas tam sim no load: Thaum lub sij hawm siv mus sij hawm ntev, tsis tu ncua xyuas cov load tam sim no kom paub tseeb tias cov cable tsis dhau. Yog tias qhov kub thiab txias ntawm lub cable raug pom tias siab dhau lawm, nws yuav tsum tau kho cov khoom siv hluav taws xob los yog hloov nrog lub peev xwm ntau dua.
