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电缆直径和电缆流过电流计算以及对照表

作者: 发表时间:2020-05-08 16:27:33 浏览量:


1,TONGXINXIANDEYAJIANGYUQIDIANZUYOUGUAN,QIDIANZUJISUANGONGSHI: 


20℃SHI:17.5÷JIEMIANJI(PINGFANGHAOMI)=MEIQIANMIDIANZUZHI(Ω) 

75℃SHI:21.7÷JIEMIANJI(PINGFANGHAOMI)=MEIQIANMIDIANZUZHI(Ω) 

QIYAJIANGJISUANGONGSHI(ANOUMUDINGLV):V=R×A

XIANSUNSHIYUQISHIYONGDEYAJIANG、DIANLIUYOUGUAN。 

QIXIANSUNJISUANGONGSHI:P=V×A  

P-XIANSUNGONGLV(WATE) V-YAJIANGZHI(FUTE) A-XIANDIANLIU(ANPEI)


2、TONGXINXIANDIANYUANXIANDIANLIUJISUANFA


1PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--17A。 

1.5PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--21A。 

2.5PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--28A。 

4PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--35A 

6PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--48A   

10PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--65A。 

16PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--91A 

25PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--120A。  

DANXIANGFUHEANMEIQIANWA4.5A(COS&=1),JISUANCHUDIANLIUHOUZAIXUANDAOXIAN。


3、TONGXINXIANYULVXINXIANDEDIANLIUDUIBIFA


2.5PINGFANGHAOMITONGXINXIANDENGYU4PINGFANGHAOMILVXINXIAN   

4PINGFANGHAOMITONGXINXIANDENGYU6PINGFANGHAOMILVXINXIAN   

6PINGFANGHAOMITONGXINXIANDENGYU10PINGFANGHAOMILVXINXIAN   

<10PINGFANGHAOMIYIXIACHENGYIWU>   


JI: 2.5PINGFANGHAOMITONGXINXIAN=<4PINGFANGHAOMILVXINXIAN×5>20ANPEI=4400 WA;   

4PINGFANGHAOMITONGXINXIAN=<6PINGFANGHAOMILVXINXIAN×5>30ANPEI=6600 WA;

6PINGFANGHAOMITONGXINXIAN=<10PINGFANGHAOMILVXINXIAN×5>50ANPEI=11000 WA 

TUFANGFASHITONGXINXIAN1GEPINGFANG1KW,LVXIN2GEPINGFANG1KW.DANWEISHIPINGFANGHAOMI

JIUSHIHENGJIEMIANJI(PINGFANGHAOMI)   


DIANLANZAILIULIANGGENJUTONGXIN/LVXINBUTONG,TONGXINNIYONG2.5(PINGFANGHAOMI)JIUKEYILE  QIBIAOZHUN:

0.75/1.0/1.5/2.5/4/6/10/16/25/35/50/70/95/120/150/185/240/300/400...  


HAIYOUFEIWOGUOBIAOZHUNRU:2.0   

LVXIN1PINGFANGZUIDAZAILIULIANG9A,TONGXIN1PINGFANGZUIDAZAILIULIANG13.5A

ERDIANWUXIACHENGYIJIU,WANGSHANGJIANYISHUNHAOZOU。

SANSHIWUCHENGSANDIANWU,SHUANGSHUANGCHENGZUJIANDIANWU。

TIAOJIANYOUBIANJIAZHESUAN,GAOWENJIUZHETONGSHENGJI。

CHUANGUANGENSHUERSANSI,BAQILIUZHEMANZAILIU。

1、“ERDIANWUXIACHENGYIJIU,WANGSHANGJIANYISHUNHAOZOU”SHUODESHI:

2.5mm’JIYIXIADEGEZHONGJIEMIANLVXINJUEYUANXIAN,QIZAILIULIANGYUEWEIJIEMIANSHUDE9BEI。RU2.5mm’DAOXIAN,ZAILIULIANGWEI2.5×9=22.5(A)。CONG4mm’JIYISHANGDAOXIANDEZAILIULIANGHEJIEMIANSHUDEBEISHUGUANXISHISHUNZHEXIANHAOWANGSHANGPAI,BEISHUZHUCIJIANl,JI4×8、6×7、10×6、16×5、25×4。


2、“SANSHIWUCHENGSANDIANWU,SHUANGSHUANGCHENGZUJIANDIANWU”,SHUODESHI:

35mm”DEDAOXIANZAILIULIANGWEIJIEMIANSHUDE3.5BEI,JI35×3.5=122.5(A)。CONG50mm’JIYISHANGDEDAOXIAN,QIZAILIULIANGYUJIEMIANSHUZHIJIANDEBEISHUGUANXIBIANWEILIANGGELIANGGEXIANHAOCHENGYIZU,BEISHUYICIJIAN0.5。JI50、70mm’DAOXIANDEZAILIULIANGWEIJIEMIANSHUDE3BEI;95、120mm”DAOXIANZAILIULIANGSHIQIJIEMIANJISHUDE2.5BEI,YICILEITUI。 


3、“TIAOJIANYOUBIANJIAZHESUAN,GAOWENJIUZHETONGSHENGJI”。

SHANGSHUKOUJUESHILVXINJUEYUANXIAN、MINGFUZAIHUANJINGWENDU25℃DETIAOJIANXIAERDINGDE。RUOLVXINJUEYUANXIANMINGFUZAIHUANJINGWENDUZHANGQIGAOYU25℃DEDIQU,DAOXIANZAILIULIANGKEANSHANGSHUKOUJUEJISUANFANGFASUANCHU,RANHOUZAIDAJIUZHEJIKE;DANGSHIYONGDEBUSHILVXIANERSHITONGXINJUEYUANXIAN,TADEZAILIULIANGYAOBITONGGUIGELVXIANLVEDAYIXIE,KEANSHANGSHUKOUJUEFANGFASUANCHUBILVXIANJIADAYIGEXIANHAODEZAILIULIANG。RU16mm’TONGXIANDEZAILIULIANG,KEAN25mm2LVXIANJISUAN。 

2.5PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--28A。 

4PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--35A 。 

6PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--48A 。

10PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--65A。 

16PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--91A 。 

25PINGFANGHAOMITONGDIANYUANXIANDEANQUANZAILIULIANG--120A。 

RUGUOSHILVXIAN,XIANJINGYAOQUTONGXIANDE1.5-2BEI。

RUGUOTONGXIANDIANLIUXIAOYU28A,ANMEIPINGFANGHAOMI10ALAIQUKENDINGANQUAN。

RUGUOTONGXIANDIANLIUDAYU120A,ANMEIPINGFANGHAOMI5ALAIQU。

DAOXIANDEJIEMIANJISUONENGZHENGCHANGTONGGUODEDIANLIUKEGENJUQISUOXUYAODAOTONGDEDIANLIUZONGSHUJINXINGXUANZE,YIBANKEANZHAORUXIASHUNKOULIUJINXINGQUEDING:

SHIXIAWU,BAISHANGER, 

ERWUSANWUSISANJIE,

QISHIJIUWULIANGBEIBAN,

TONGXIANSHENGJISUAN。

JINIJIESHIYIXIA:

JIUSHI10PINGFANGYIXIADELVXIAN,PINGFANGHAOMISHUCHENGYI5JIUKEYILE,YAOSHITONGXIANNI,JIUSHENGYIGEDANG,BIRU2.5PINGFANGDETONGXIAN,JIUAN4PINGFANGJISUAN.YIBAIYISHANGDEDOUSHIJIEMIANJICHENGYI2,ERSHIWUPINGFANGYIXIADECHENGYI4, SANSHIWUPINGFANGYISHANGDECHENGYI3, QISHIHE95PINGFANGDOUCHENGYI2.5,ZHEIMEJIJUKOUJUEYINGGAIHENHAOJIBA。 


SHIXIAWU,BAISHANGER ERWU,SANWU,SISANJIE QISHI,JIUWUERBEIBAN LUOXIANJIAYIBAN,TONGXIANSHENGJISUAN CHUANGUAN,GAOWENBA,JIUZHE SHUOMING:


1、“SHIXIAWU”ZHIDAOXIANJIEMIANZAI10PINGFANGHAOMIJIYIXIA,MEI1PINGFANGHAOMIANQUANDIANLIUWEI5ANPEI。 

2、“BAISHANGER”ZHIDAOXIANJIEMIANZAI100PINGFANGHAOMIYISHANG,MEI1PINGFANGHAOMIANQUANDIANLIUWEI2ANPEI。 

3、“ERWU,SANWU,SISANJIE”ZHIDAOXIANJIEMIANZAI25PINGFANGHAOMIJI16PINGFANGHAOMI,MEI1PINGFANGHAOMIANQUANDIANLIUWEI4ANPEI。DAOXIANJIEMIANZAI35PINGFANGHAOMIHE50PINGFANGHAOMI,MEI1PINGFANGHAOMIANQUANDIANLIUWEI3ANPEI。 

4、“QISHI,JIUWUERBEIBAN”ZHIDAOXIANJIEMIANZAI70PINGFANGHAOMIHE95PINGFANGHAOMI,MEI1PINGFANGHAOMIANQUANDIANLIUWEI2.5ANPEI。 

“LUOXIANJIAYIBAN,TONGXIANSHENGJISUAN”ZHITONGJIEMIANDELUOXIAN,KEANJUEYUANDAOXIANCHENGYI1.5BEIJISUANANQUANDIANLIU。TONGJIEMIANDETONGDAOXIANANLVDAOXIANDAYIXIANHAODENGJIJISUANANQUANDIANp=ui42000/220=191ACHUNDIANZUXINGYUANJIAN。JIANYIYONG150PINGFANGDIANLAN。


1PINGFANGSULIAOJUEYUANDAOXIANANQUANZAILIUZHI:

MINGXIAN──17AN,

CHUANGANGGUAN:ERGEN──12AN,SANGEN──11AN,SIGEN──10AN,

CHUANSULIAOGUAN:ERGEN──10AN,SANGEN──10AN,SIGEN──9AN。

HUTAOXIAN:ERXIN──13AN,SANXINSIXIN──9.6AN。

XIANGJIAOJUEYUANXIAN;MINGXIAN──18AN,CHUANGANGGUAN:ERGEN──13AN,SANGEN──12AN,SIGEN──11AN

SHUOMING:ZHINENGZUOWEIGUSUAN,BUSHIHENZHUNQUE。


LINGWAI,RUGUOANSHINEIJIZHUDIANXIAN6PINGFANGHAOMIYIXIADETONGXIAN,MEIPINGFANGDIANLIUBUCHAOGUO10AJIUSHIANQUANDE,CONGZHEIGEJIAODUJIANG,NIKEYIXUANZE1.5PINGFANGDETONGXIANHUO2.5PINGFANGDELVXIAN。


10MINEI,DAOXIANDIANLIUMIDU6A/PINGFANGHAOMIBIJIAOHESHI,10-50MI,3A/PINGFANGHAOMI,50-200MI,2A/PINGFANGHAOMI,500MIYISHANGYAOXIAOYU1A/PINGFANGHAOMI。CONGZHEIGEJIAODU,RUGUOBUSHIHENYUANDEQINGKUANGXIA,NIKEYIXUANZE4PINGFANGTONGXIANHUOZHE6PINGFANGLVXIAN。 

RUGUOZHENSHIJULI150MIGONGDIAN(BUSHUOGAOLOU),YIDINGCAIYONG4PINGFANGDETONGXIAN。


DAOXIANDEZUKANGYUQIZHANGDUCHENGZHENGBI,YUQIXIANJINGCHENGFANBI。QINGZAISHIYONGDIANYUANSHI,TEBIEZHUYISHURUYUSHUCHUDAOXIANDEXIANCAIYUXIANJINGWENTI。YIFANGZHIDIANLIUGUODASHIDAOXIANGUOREERZAOCHENGSHIGU。


XIAMIANSHITONGXIANZAIBUTONGWENDUXIADEXIANJINGHESUONENGCHENGSHOUDEZUIDADIANLIUBIAOGE。


XIANJING(DAYUEZHI)(mm2)


4、DAOXIANXIANJINGJISUAN   


DAOXIANXIANJINGYIBANANRUXIAGONGSHIJISUAN: 

TONGXIAN:S= IL / 54.4*U` 

LVXIAN:S= IL / 34*U`  


SHIZHONG:

I——DAOXIANZHONGTONGGUODEZUIDADIANLIU(A) 

L——DAOXIANDEZHANGDU(M) 

U`——CHONGXUDEDIANYUANJIANG(V) 

S——DAOXIANDEJIEMIANJI(MM2) 


SHUOMING: 

1、U`DIANYAJIANGKEYOUZHENGGEXITONGZHONGSUOYONGDESHEBEI(RUTANCEQI)FANWEIFENJIXITONGGONGDIANYONGDEDIANYUANDIANYAEDINGZHIZONGHEQILAIKAOLVXUANYONG。 

2、JISUANCHULAIDEJIEMIANJIWANGSHANGKAO.JUEYUANDAOXIANZAILIULIANGGUSUAN。


★LVXINJUEYUANDAOXIANZAILIULIANGYUJIEMIANDEBEISHUGUANXI(25DU)


★TONGXINJUEYUANDAOXIANZAILIULIANGYUJIEMIANDEBEISHUGUANXI(25DU)



5、ZAILIULIANG


GUSUANKOUJUE:

ERDIANWUXIACHENGYIJIU,WANGSHANGJIANYISHUNHAOZOU。

SANSHIWUCHENGSANDIANWU,SHUANGSHUANGCHENGZUJIANDIANWU。

TIAOJIANYOUBIANJIAZHESUAN,GAOWENJIUZHETONGSHENGJI。

CHUANGUANGENSHUERSANSI,BAQILIUZHEMANZAILIU。 

SHUOMING:

BENJIEKOUJUEDUIGEZHONGJUEYUANXIAN(XIANGPIHESULIAOJUEYUANXIAN)DEZAILIULIANG(ANQUANDIANLIU)BUSHIZHIJIEZHICHU,ERSHI“JIEMIANCHENGSHANGYIDINGDEBEISHU”LAIBIAOSHI,TONGGUOXINSUANERDE。YOUBIAO5 3KEYIKANCHU:BEISHUSUIJIEMIANDEZENGDAERJIANXIAO。


1、“ERDIANWUXIACHENGYIJIU,WANGSHANGJIANYISHUNHAOZOU”SHUODESHI:

2.5mm’JIYIXIADEGEZHONGJIEMIANLVXINJUEYUANXIAN,QIZAILIULIANGYUEWEIJIEMIANSHUDE9BEI。RU2.5mm’DAOXIAN,ZAILIULIANGWEI2.5×9=22.5(A)。CONG4mm’JIYISHANGDAOXIANDEZAILIULIANGHEJIEMIANSHUDEBEISHUGUANXISHISHUNZHEXIANHAOWANGSHANGPAI,BEISHUZHUCIJIANl,JI4×8、6×7、10×6、16×5、25×4。


2、“SANSHIWUCHENGSANDIANWU,SHUANGSHUANGCHENGZUJIANDIANWU”SHUODESHI:

35mm”DEDAOXIANZAILIULIANGWEIJIEMIANSHUDE3.5BEI,JI35×3.5=122.5(A)。CONG50mm’JIYISHANGDEDAOXIAN,QIZAILIULIANGYUJIEMIANSHUZHIJIANDEBEISHUGUANXIBIANWEILIANGGELIANGGEXIANHAOCHENGYIZU,BEISHUYICIJIAN0.5。JI50、70mm’DAOXIANDEZAILIULIANGWEIJIEMIANSHUDE3BEI;95、120mm”DAOXIANZAILIULIANGSHIQIJIEMIANJISHUDE2.5BEI,YICILEITUI。


SHANGSHUKOUJUESHILVXINJUEYUANXIAN、MINGFUZAIHUANJINGWENDU25℃DETIAOJIANXIAERDINGDE。RUOLVXINJUEYUANXIANMINGFUZAIHUANJINGWENDUZHANGQIGAOYU25℃DEDIQU,DAOXIANZAILIULIANGKEANSHANGSHUKOUJUEJISUANFANGFASUANCHU,RANHOUZAIDAJIUZHEJIKE;DANGSHIYONGDEBUSHILVXIANERSHITONGXINJUEYUANXIAN,TADEZAILIULIANGYAOBITONGGUIGELVXIANLVEDAYIXIE,KEANSHANGSHUKOUJUEFANGFASUANCHUBILVXIANJIADAYIGEXIANHAODEZAILIULIANG。RU16mm’TONGXIANDEZAILIULIANG, KEAN25mm2LVXIANJISUANHENGJIEMIANJIYUEDA,DIANZUYUEXIAO,XIANGTONGDIANYAXIATONGGUODEDIANLIUYUEDA。


JIATINGYONGDIANXIAN,YIBANDOUSHIYONGJIATINGDIANLUXITONGBUZHIFANGFALIDEJINGYANGONGSHIJISUAN。DAOXIANDEXUANZEYITONGXINDAOXIANWEILI,QIJINGYANGONGSHIWEI:DAOXIANJIEMIAN(DANWEIWEIPINGFANGHAOMI)≈I/4(A) 。  


YUE1PINGFANGHAOMIJIEMIANDETONGXINDAOXIANDEEDINGZAILIULIANG≈4A ,2.5PINGFANGHAOMIJIEMIANDETONGXINDAOXIANDEEDINGZAILIULIANGYUEWEI10AN。 


QISHIDAOXIANDEZAILIULIANGDUODAZHUYAOYAOKANDAOXIANSANRETIAOJIANHEBUXIANCHANGSUODEZHONGYAOXING。 


 JIAKONGFUSHEDAOXIANDESANRETIAOJIANJIUHAOXIE,CHUANGUAN、MAIQIANGDENGFENGBIANFUDAOXIANDESANRETIAOJIANJIUYAOCHAXIE;DUOGENDAOXIANBIDANGENDAOXIANSANRETIAOJIANCHAXIE,YIGENGUANLIDAOXIANYUEDUOSANREYUECHA。TONGYANGDAXIAODEDAOXIANZAISANRETIAOJIANHAODEQINGKUANGXIAZAILIULIANGKEYIDAXIE,ERSANRETIAOJIANCHADEQINGKUANGXIAZAILIULIANGJIUYAOXIAOXIE。  


BUXIANCHANGSUOHENZHONGYAO,ANQUANYAOQIUGAO,ZAILIULIANGJIUXIAO,BUSHIHENZHONGYAODECHANGSUOZAILIULIANGJIUDAXIE。SHANGMIANSHUODEJIATINGBUXIANDAOXIANZAILIULIANGJIUHENXIAO。


YANGEYAOQIUJIUYONGDAOXIANJIEMIANJICHENGYI4ZUOWEIZAILIULIANG。ZAILIULIANGXIAO,DAOXIANJIUYAODEDUO,CHENGBENJIUGAO。WEILEJIANGDICHENGBEN,YOUBAOZHENGANQUAN,HENDUOJIAZHUANGZAIBUSHIFENGBIBUXIANSHIJIUCAIYONGDAOXIANJIEMIANJICHENGYI5BEIHUOZHE6BEILAITIGAODAOXIANDEZAILIULIANG。


ZHEIYESHIJIATINGBUXIANDEZUIDAZAILIULIANG,ZAIDAJIUBUNENGBAOZHENGJIATINGDIANQIANQUANZHENGCHANGDESHIYONGLE。RUGUOSHIGONGYEYONGDIAN,SHIKEYIYONGDAODAOXIANJIEMIANJICHENGYI9BEIZUOYOUDEZAILIULIANG。


YONGJIATINGBUXIANJINGYANGONGSHILAIKAN2.5PINGFANGTONGXINDAOXIANZAILIULIANGJIUSHI2.5*4SHIDUIDE,2.5*5YEKEYI,YEYOUYONG2.5*6DE。DANSHIGONGCHANGDENGSANRETIAOJIANHAODEDIFANGYEKEYIYONG2.5*9SHENZHI2.5*10 


ZONGZHI,TONGYIDAOXIANZAIBUTONGDETIAOJIAN、BUTONGDEYAOQIUXIASHIYOUBUTONGDEZAILIULIANG。 

 

XIAMIANJIGEDAOXIANZHANGQIYUNXUZAILIULIANGBIAOJINICANKAO,TADEZAILIULIANGYESHIYOUTIAOJIANDE,ERQIESHIZUIDADE。


6、TONGLVXIANMEIQIANMIDUIYINGDIANZU  


1、BIAOCHENGJIEMIANJI/ (TONGXINXIAN)



2、BIAOCHENGJIEMIANJI/ (LVXINXIAN)



DIANZUGONGSHI:

YAJIANG=2XDIANZUXSHEBEIZONGDIANLIU-JIAOLIUDIANYA=SHEBEIGONGDIANDIANYA

R=p*l/s

p—DIANZULVCHABIAOQIU;

l—DIANZUZHANGDU;

s—YUDIANLIUCHUIZHIDEDIANZUJIEMIANMIANJI 

LIANGGEDIANZURCHUANLIANHUIBIANDA,CHENGWEI2R,YIWEIZHEZHANGDUZENGJIA1BEI,DIANZUZHIZENGJIA1BEI,DIANZUYUZHANGDUCHENGZHENGBI。

LIANGGEDIANZURBINGLIAN,1/2R,HENGJIEMIANJIZENGJIA1BEI,DIANZUZHIBIANWEI1/2,DIANZUYUJIEMIANJICHENGFANBI。 

YINCI:

R=pl/S.  p=RS/l  


JINSHUSIJIUSHIYIGENSHUIGUAN,DIANLIUJIUSHISHUIGUANLIDEXIAOYU,DANGSHUIGUANZHANGSHIYUJIUGANJUECONGZHEIDUANDAONEIDUANZULIHENDAHENKUNNAN,DANGRANGUANZIYUEXI(JIEMIANXIAO)GANJUEYEYUEYUNDONGDAOLINGYIDUANGENGKUNNAN。DIANZULVJIUSHISHUIDUIYUDEZULIZHEIGEXINGZHIDECHANGSHU,WULUNNIGUANZIDUOZHANGHUOZHEDUOXI,SHUIDUIYU(DIANZI)DEZULITONGLEISHUIDEGUANZISHIYIYANGDE  TONGDEDIANZULV0.0175,LVDEDIANZULV0.026。CONGZAILIULIANGSHANGLAIJIANG,4PINGFANGTONGXIANGDANGYULVXIAN4*0.026/0.0175=4*1.485=5.94PINGFANG。 


DANYOUYULVDENAIREXINGBITONGCHA,SUOYI4PINGFANGTONGXIANKEYONGDIANLIUNENGCHAOGUO6PINGFANGLVXIAN。 


10PINGFANGLIANGXINDIANLAN,WENDU20SHIYUNXUZAILIULIANGWEI75A,DIANYAJIANGWEI4.67MV/MI ZAI220VDIANYAXIAKEYIDAIDONG16.5KWYINEIDEDIANQIJIEMIAN1PINGFANGHAOMIZHANGDU1MIDETONGXINXIANZAI20SHESHIDUSHIDIANZUWEI0.018OU,R=P*L/S(PDIANZUXISHU.LZHANGDUMI.SJIEMIANPINGFANGHAOMI)DIANZUWEI0.72OU。 


220VDIANYAXIAXIANSUNDEJISUANWEI:

P=I2R(pSUNSHIGONGLVW,iSHEBEIDIANLIU,rDIANLANDIANZU) 

SHEGONGZUOSHISHEBEIDIANLIUWEI50A,ZESUNSHIGONGLVWEI50*2*0.72=72W。

DIANZULVYINGWEI

p=0.0175OU.mm^2/m =1.75*10^-8OU.m  

L=6000mm=6m,S=6mm^2  

R=pL/S=0.0175*6/6=0.0175OU

R=PL/S   


RSHIDIANZU(DANWEISHIΩ),PSHIGAIZHONGCAILIAODEDIANZULV(TONGDEDIANZULVWEI0.0175 ),LSHIDAOTIZAIDIANLIUFANGXIANGSHANGDEZHANGDU(DANWEISHIMIm),SSHIDAOTICHUIZHIYUDIANLIUFANGXIANGDEHENGJIEMIANJI(DANWEISHIPINGFANGMI)。


ZHONGLIANGYONGM=PVLAIJISUAN,MSHIZHONGLIANG(DANWEISHIkgQIANKE)PSHIMIDU(TONGDEMIDU=8.9×103QIANKE/LIFANGMI)VSHITIJI(DANWEISHILIFANGMI)。


7、JULISHUOMING   


RUO500WDEGONGLVYONGDUOSHAOPINGFANGDEXIANLANLE??ZHEIGEJISUANGONGSHISHISHENME?


ZHEIYAOKANNIYONGSANXIANGHAISHIDANXIANG。

DANXIANGANP=UI 

SANXIANGANP=1.732*UI  


JIASHENISHIDANXIANG:P=UI  I=P/U=500/220=2.27  AN 

JIASHENISHISANXIANG :P=1.732UI   I=P/1.732U=500/1.732*380=0.75AN


YAJIANG=DIANLIU*DAOXIANDIANZU    

DAOXIANDIANZU=(DAOXIANZHANGDU*DIANZULV)/DAOXIANJIEMIANJI  

DIANLIU=YONGDIANGONGLV/YONGDIANDIANYA 

TONGDEDIANZULV=1.75*10-8CIFANGOU.MI


1.5PINGFANGDETONGXIANJIUSHI1.5mm2JIEMIANJIDETONGXIAN,ZHEIYANG2000mZHANGDETONGXIANDIANZU(CHANGWEN)WEI:  

(2000m*1.75*10-8CIFANGOU.m)/1.5*10-6CIFANGm2 =23.33OUMU  


ZHEIYANGRUGUONIDAOXIANSHANGTONGGUO1ADEDIANLIU,ZEYAJIANGWEI23.3V。 YEJIUMEIPINGFANGMIDUIDIANYAYAJIANGWEI0.0024mv。   


JIARUNIYONGDIANDIANQIEDINGGONGLVWEI1QIANWA,EDUGONGZUODIANYAWEI220V,ZEYONGZHEIYANGDEDAOXIANDEHUA,YAJIANGWEI:71.5V (YUEYOUSANFENZHIYIDEDIANNENGDOULANGFEIDAODAOXIANSHANGLE)  JIARUNIJIELEGE100WADEGONGLV,ZEYAJIANGWEI:10.1V (JIBENKEYIHULVELE,BUYINGXIANGDIANQIZHENGCHANGGONGZUO)    


SUOYIJIANYISHIYONGGONGLVBUYAOCHAOGUO200WWEIHAO,CHAOGUO200WLE,NIYONGDIANDIANQISHANGDESHIJIDIANYAJIANGDIYU200V。 


FEN3DANGJISUAN,SHUOMINGFUZAIQINGKUANG,YIDIANJIWEIFUZAIXINGSUAN。 


1、 DIANXIANZHANGDU:L=400MI,

DIANJIGONGLV:15kw+12kw+18kw=45KW,

DIANLIU:I≈90A,TONGXIANJIEMIAN:S=25PINGFANG,

TONGXIANDIANZULV:ρ=0.0172

QIU400MIJULIXIANZU(DANXIAN): 

R=ρ×(L/S)=0.0172×(400/25)≈0.275(Ω) 

QIU400MIJULIDIANYAJIANG(DANXIAN):U=RI=0.275×90≈25(V) 

GAIDUANXIANDIANYAWEI: 

380-25×2(SHUANGXIAN)=330(V) 


2、 DIANXIANZHANGDU:L=600-400=200MI,

DIANJIGONGLV:12kw+18kw=30KW,I≈60A

QIU200MIJULIXIANZU(DANXIAN): 

R=ρ×(L/S)=0.0172×(200/25)≈0.138(Ω) 

QIU200MIJULIDIANYAJIANG(DANXIAN): 

U=RI=0.138×60≈8(V) 

GAIDUANXIANDIANYAWEI:

380-(25+8)×2=314(V) 


3、DIANXIANZHANGDU:L=700-600-400=100MI,

DIANJIGONGLV:18KW,

I≈36A 

QIU100MIJULIXIANZU(DANXIAN): 

R=ρ×(L/S)=0.0172×(100/25)≈0.069(Ω) 

QIU100MIJULIDIANYAJIANG(DANXIAN): 

U=RI=0.069×36≈2.5(V) 

MODUANDIANYAWEI: 

380-(25+8+2.5)×2=309(V) 


JULI:RUGUOYONG4PINGFANG(mm)TONGXIAN,XIANZHANG:200m.(SANXIANGSIXIAN)。NEIME30RIXIANDEHAODIANYOUDUOSHAO?  6PINGFANG(mm)DEXIANYOUSHIDUOSHAO?  

1PINGFANGHAOMIDENGYU1/1000000 PINGFANGMI

(1PINGFANGHAOMI=0.01PINGFANGLIMI=0.0001PINGFANGFENMI=0.0000 01PINGFANGMI,1HAOMI=1/1000MI  

1PINGFANGHAOMI=1/(1000*1000)PINGFANGMI ) 


WUTIDIANZUGONGSHI:

R=ρL/S  

SHIZHONG: 

RWEIWUTIDEDIANZU(OUMU);  

ρWEIWUZHIDEDIANZULV,DANWEIWEIOUMUMI(Ω. mm2/m)。  

LWEIZHANGDU,DANWEIWEIMI(m)  

SWEIJIEMIANJI,DANWEIWEIPINGFANGMI(mm2) 


OUMUDINGLV(I=U/R) 

DIANXIANSHANGDEDIANYAJIANGDENGYUDIANXIANZHONGDEDIANLIUYUDIANXIANDIANZUDECHENGJI(U=I*R) 

GONGLVJISUANGONGSHIP=U2/R(UDAIBIAODIANYA、RDAIBIAODIANZU) 

CHUNYINXIANZAI0℃DEDIANZULVSHI0.016 Ω.mm2/m(OUMUMI ),  CHUNTONGXIANZAI0℃SHIDEDIANZULVSHI0.0175 Ω.mm2/m(OUMUMI),DIANZUWENDUXISHUSHI0.00393/℃。 CHUNLVXIANZAI0℃DEDIANZULVSHI0.0283 Ω.mm2/m(OUMUMI), 


ρ=ρo(1+a*t)

SHIZHONG 

ρ——ZAItSHESHIDUSHIDEDIANZULV  

ρo——ZAI0℃SHIDEDIANZULV  

t——WENDU   


CHUNTONGXIANZAI21℃DUSHIDEDIANZULV =0.0175(1+0.00393*21)=0.0189 Ω.mm2/m) R=0.0175X200/4=0.875OUMU  


30RIDEHAODIANLIANG,RUGUOSHI220VDEDIANYA,NEIMEXIANYAOQIUCHUGONGLV   P=U2/R=2202/0.875=55.314W 

(ZHEIZHONGZHUANGTAISHIDIANXIANZHIJIEGOUCHENGHUILU,YEJIUSHISHUOBUJIERENHEJIAYONGDIANQI。RUGUOZHENZHEIMEZUOKONGKAIHUIZHIJIETIAOZHA!)  

55.314X30X24÷1000=39.826DU (1DUDIAN=1QIANWASHI)  


DIANYASUNSHI=∑(P*L)/(C*S) 

P:DIANLUZONGGONGLV(KW) L:DIANYUANJUFUHEDEJULI(m)  C:CAILIAOXISHU (380VSHI,TONGQU77,LV46.3;220VSHI,TONGQU12.8,LVQU7.75)  S:DAOXIANJIEMIANJI(mm)


8 、BUTONGJINSHUDAOTIDIANZULV  


JIZHONGJINSHUDAOTIZAI20℃SHIDEDIANZULV

(1)YIN 1.65(OU) × 10-8(MI)

(2)TONG 1.75 × 10-8    

(3)LV 2.83 × 10-8    

(4)WU 5.48 × 10-8    

(5)TIE 9.78 × 10-8    

(6)BO 2.22 × 10-7    

(7)MENGTONG 4.4 × 10-7    

(8)GONG 9.6 × 10-7    

(9)KANGTONG 5.0 × 10-7    

(10)NIEGEHEJIN 1.0 × 10-6    

(11)TIEGELVHEJIN1.4 × 10-6     

(12)LVNIETIEHEJIN1.6 × 10-6   

(13)SHIMO(8~13)×10-6









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