北京快三走势图

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三芯高压电缆屏蔽截面计算公式

北京快三走势图     SANXINDIANLANYOUYUYIBUFENPINGBIZAIDAOTIZHONGJIAN,QISHIDUANLUWENDUKEYIZHIJIEQU90℃,ERDUIYUDANXINDIANLANJINSHUPINGBICENGLAISHUO,QISHIDUANLUWENDUJIEYUDAOTIWENDUYUHUANJINGWENDUZHIJIAN,KEYICANZHAOZAILIULIANGDEJISUAN,BUKAOLVJUEYUANSUNHAODEYINGXIANG,KEGENJUYIXIAGONGSHIJISUAN:

    θi=θ-I2RT

    SHIZHONG:

    θ—DAOTIZHANGQIGONGZUOWENDU,℃

    I—DAOTIZHANGQIGONGZUODIANLIU,A

北京快三走势图     R—DAOTIGONGZUOWENDUXIADEJIAOLIUDIANZU,Ω/m

    T—JUEYUANCENGDEREZU,K·m/W

    YOUCIKEJIAN,BUTONGDEHUCENGCAILIAO、FUSHEFANGSHIHUIYINGXIANGDIANLANDEJISUANZAILIULIANG,TONGYANGYEYINGXIANGLEDIANLANJINSHUPINGBICENGDEQISHIDUANLUWENDU。

    DUIYUZUIZHONGDUANLUWENDUKEYICANZHAOGB50217——94《DIANLIGONGCHENGDIANLANSHEJIGUIFAN》 ZHONGDEGUIDING:DIANLIDIANLANJINSHUPINGBICENGDEYOUXIAOJIEMIAN,YINGMANZUZAIKENENGDEZANTAIDIANLIUZUOYONGXIAWENSHENGZHIBUCHAOGUOJUEYUANYUWAIHUCENGDEDUANLURONGXUZUIGAOWENDUPINGJUNZHI。

    ANZHAOCITIAOWEN,DUIYUJIAOLIANDIANLANLAISHUO,ZUIZHONGDUANLUWENDUWEI250/2+160/2=205℃,ERGENJUYOUGUANWENXIAN,CIZHIQU300℃RENGPIANYUANQUAN。

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