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兰州二手电线电缆应该注意的几个方面
来源:www.sdgxy.cn发表时间:2018-12-24

在选用电线电缆时,一般要注意电线电缆型号、规格(导体截面)的选择。Whenchoosingwireandcable,weshouldpayattentiontothechoiceofwireandcabletypeandspecification(conductorcrosssection).⒈电线电缆型号的选择Selectionofwireandcablemodel选用电线电缆时,要考虑用途,敷设条件及安全性;例如:Whenselectingwiresandcables,theuse,layingconditionsandsafetyshouldbeconsidered;forexample:根据用途的不同,可选用电力电缆、架空绝缘电缆、控制电缆等;Accordingtothedifferentuses,powercables,overheadinsulatedcablesandcontrolcablescanbeused.根据敷设条件的不同,可选用一般塑料绝缘电缆、钢带铠装电缆、钢丝铠装电缆、防腐电缆等;Accordingtothedifferentlayingconditions,generalplasticinsulatedcables,steeltapearmoredcables,steelwirearmoredcablesandanticorrosivecablescanbeselected.根据安全性要求,可选用阻燃电缆、无卤阻燃电缆、耐火电缆等。Accordingtothesafetyrequirements,flameretardantcable,halogenfreeflameretardantcableandfireresistantcablecanbeselected.⒉电线电缆规格的选择Selectionofwireandcablespecifications确定电线电缆的使用规格(导体截面)时,一般应考虑发热,电压损失,经济电流密度,机械强度等选择条件。Whendeterminingthespecificationsofconductorandcable(conductorcrosssection),weshouldgenerallyconsiderheating,voltageloss,economiccurrentdensityandmechanicalstrength.根据经验,低压动力线因其负荷电流较大,故一般先按发热条件选择截面,然后验算其电压损失和机械强度;低压照明线因其对电压水平要求较高,可先按允许电压损失条件选择截面,再验算发热条件和机械强度;对高压线路,则先按经济电流密度选择截面,然后验算其发热条件和允许电压损失;而高压架空线路,还应验算其机械强度。若用户没有经验,则应征询有关专业单位或人士的意见。Accordingtotheexperience,thelowvoltagepowerline,becauseofitshighloadcurrent,usuallyselectsthecrosssectionaccordingtotheheatingcondition,andthenchecksthevoltagelossandmechanicalstrength.Thelowvoltagelightinglinecanselectthecrosssectionaccordingtotheconditionofthevoltageloss,andthenchecktheheatconditionandthemechanicalstrength.First,choosethecrosssectionaccordingtotheeconomiccurrentdensity,thenchecktheheatingconditionandallowablevoltageloss,andthehighvoltageoverheadlinealsocalculatesitsmechanicalstrength.Iftheuserhasnoexperience,heshouldconsulttherelevantprofessionalunitsorpeople.电线电缆的运输和保管Transportandstorageofwireandcable1、运输中严禁从高处扔下电缆或装有电缆的电缆盘,特别是在较低温度时(一般为5℃左右及以下),扔、摔电缆将有可能导致绝缘、护套开裂。1,intransportation,itisstrictlyforbiddentothrowcablesorcableplatesfromhighplaces,especiallyatlowertemperatures(usuallyabout5degreescentigradeorso).Throwingandthrowingcablesmaycauseinsulationandsheathcracking.2、尽可能避免在露天以裸露方式存放电缆,电缆盘不允许平放。2,trytoavoidstoringcablesintheopenairasfaraspossible,andthecabledisksarenotallowedtobeplacedhorizontally.3、吊装包装件时,严禁几盘同时吊装。在车辆、船舶等运输工具上,电缆盘要用合适方法加以固定,防止互相碰撞或翻倒,以防止机械损伤电缆。3,whenliftingpackages,itisstrictlyprohibitedtoliftseveraldishessimultaneously.Invehicles,shipsandothermeansoftransport,cableplatesshouldbefixedinsuitablewaystopreventcollisionoroverturn,soastopreventmechanicaldamagetocables.4、电缆严禁与酸、碱及矿物油类接触,要与这些有腐蚀性的物质隔离存放.贮存电缆的库房内不得有破坏绝缘及腐蚀金属的有害气体存在。4,thecableisstrictlyforbiddentocontactwithacid,alkaliandmineraloil,andshouldbekeptinisolationwiththesecorrosivesubstances.Thereshallbenoharmfulgasthatdestroystheinsulationandcorrodesthemetalinthestoreroomofthestoragecable.5、电缆在保管期间,应定期滚动(夏季3个月一次,其他季节可酌情延期)。滚动时,将向下存放盘边滚翻朝上,以免底面受潮腐烂。存放时要经常注意电缆封头是否完好无损。5.Duringtheperiodofstorage,thecableshouldberolledregularly(onceamonthinthesummerandpostponedinotherseasonsintime).3.Whenrolling,storethesideoftheplatedownwardandturnitupwards,soastopreventthebottomfromgettingdampandrotting.Whenstoring,alwayspayattentiontowhetherthecableheadisintact.6、电缆贮存期限以产品出厂期为限,一般不宜超过一年半,最长不超过二年。6,thedurationofcablestorageislimitedtotheproduct'sfactorylife.Generally,itshouldnotexceedoneandahalfyears,andthelongestperiodwillnotexceedtwoyears.兰州废钢回收,兰州电线电缆回收,兰州废旧物资回收