长度为3KM，负载为2200W，采用380V用25平方的电缆供电有没有问题，到电缆末端电压压降会是多少，谢谢
25\u5e73\u65b9\u7684\u94dc\u82af\u7535\u7ebf380v\u7684\u80fd\u8d1f\u8f7d\u591a\u5c11\uff1f\u3000\u300025\u5e73\u65b9\u7684\u94dc\u82af\u7535\u7ebf380v\u7684\u80fd\u8d1f\u8f7d43kw\u3002
\u3000\u3000\u67e5\u4e0b\u9762\u7684\u7535\u7f06\u8f7d\u6d41\u91cf\u8868\uff0c\u5e38\u7528pvc4\u82af\u7535\u529b\u7535\u7f06\u5728\u7a7a\u6c14\u6577\u8bbe\u65f6\u5176\u5b89\u5168\u8f7d\u6d41\u91cf\u4e3a77A\uff0c\u5bf9\u5e94\u7684\u529f\u7387\u4e3a\uff1a
\u3000\u3000P=1.732UIcos\u03c6
\u3000\u3000=1.732x77x0.38x0.85
\u3000\u3000=43kw\uff08\u6309\u4e09\u76f8\u5e02\u7535\u8ba1\u7b97\uff0c\u529f\u7387\u56e0\u6570\u53d60.85\uff09
\u6309\u4f60\u7ed9\u7684\u6761\u4ef6\uff1aI=P/U*COS\u03c6\uff0c\u4e0d\u77e5\u9053\u4f60\u7684\u529f\u7387\u56e0\u6570\uff0c\u6682\u63091\u7b97\u3002\u7535\u6d41\u2248840.9A\uff0c\u6309850A\u7b97\uff0c\u73b0\u6709\u7535\u7f06\u4e0d\u77e5\u9053\u6577\u8bbe\u65b9\u5f0f\u548c\u73af\u5883\u6e29\u5ea6\uff0c\u6309\u7a7a\u6c14\u4e2d\u6577\u8bbe\u73af\u5883\u6e29\u5ea640\u2103\uff0c25\u5e73\u65b977A\uff0c35\u5e73\u65b995A\u3002
\u4f60\u53ef\u4ee5380v\u4f9b\u7535\uff0c\u5230\u73b0\u573a\u5728\u5e73\u5747\u5206\u914d\u3002185kw\u5e73\u5747\u5206\u914d\u5230\u4e09\u76f8\u8fd8\u4e0d\u523062kw\uff0c\u7535\u6d41\u624d95A\uff0c\u56fd\u6807\u768435\u5e73\u65b9\u5e26\u7740\u867d\u7136\u5dee\u70b9\u610f\u601d\uff0c\u4f60\u8fd8\u6709\u4e00\u683925\u5e73\u65b9\u7684\u4e5f\u4e0d\u7528\u67b6\u7ebf\u554a\u3002
采用25mm²电缆没有问题 线路电压损耗25mm²电压损耗率0.536%（80℃ %/A*km） 约6V左右 故电缆末端电压降374V
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