总功率1000KW的≡相动力电要用多大的电缆？ 请问电压380V，功率500KW，输送距离1000米的三相动...
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1.\u4e09\u76f8380V 1000kW\u7684\u7535\u6d41 Ie\uff0cIe=1000kW/\uff08\u6839\u53f73x380Vx0.8\uff09=1899A\u3002
2.\u6839\u636eIe\u9009\u62e9\u7535\u7f06\u622a\u9762\u79ef\uff08\u4ee5\u5e38\u7528\u7684VV\u578b\u94dc\u7535\u7f06\u4e3a\u4f8b\uff09\uff0c\u7ecf\u67e5\uff0c\u77e53x240+1x120mm²\u622a\u9762\u7535\u7f06\u7684\u8f7d\u6d41\u91cf\u662f408A\uff0c\u4f7f\u75285\u6839\u5e76\u8054\uff0c\u8f7d\u6d41\u91cf\u662f 408Ax5=2040A> Ie\u3002
3.1000KW\uff0c\u8981\u662f10KV\u4f9b\u7535\u7535\u6d41\u7ea660A\uff0c\u8981\u662f400V\u4f9b\u7535\uff0c\u7535\u7f06\u6700\u5c0f\u7528\u53cc800\u5e73\u65b9\uff0c\u5f00\u5173\u75282500A\uff0c\u7535\u8868\u75282500/5A\u7684\u3002
4.\u4e8c\u6b21\u8981\u662f400V\u4f9b\u7535\uff0c1100KVA\u4e8c\u6b21\u7535\u6d41\u7ea61650A\uff0c\u7535\u7f06\u8ddd\u79bb200\u7c73\uff0c\u7535\u7535\u7f06\u6700\u5c0f\u662f\u53cc500\u5e73\u65b9\uff0c\u4f46\u662f\u8fd9\u4e2a\u7535\u7f06\u5927\u5c0f\u5728\u770b\u4f60\u4e8c\u6b21\u8d1f\u8f7d\u624d\u80fd\u5b9a\u3002
5.1000kw\u3001200\u7c73\u5982\u679c\u4f60\u8bbe\u5907\u7ecf\u5e38\u540c\u65f6\u542f\u52a8\u5efa\u8bae\u94dc\u7535\u7f062\u6839300\u7535\u7f06\u5f00\u51732500A\u3001\u4e92\u611f\u56682000/5\u7535\u88683*1.5\uff086\uff09\u3002
500KW\u7684\u529f\u7387\uff0c380\u4f0f\u7535\u538b\uff0c\u7535\u6d41\u5927\u7ea61000A 1\u3001\u5927\u529f\u7387\u8f93\u7535\u5b9c\u91c7\u7528\u5355\u82af\u7535\u7f06\uff0c\u5efa\u8bae\u91c7\u7528\uff08\u5355\u82af\u7535\u7f06\u5e76\u8054\uff09\uff1a YJY 0.6/1kV 1\u00d7240 \u94dc\u82af\u4ea4\u8054\u805a\u4e59\u70ef\u7edd\u7f18\u805a\u6c2f\u4e59\u70ef\u62a4\u5957\u5355\u82af\u7535\u529b\u7535\u7f06\u6216\u8005YJLY 0.6/1kV 1\u00d7300 \u94dd\u82af\u4ea4\u8054\u805a\u4e59\u70ef\u7edd\u7f18\u805a\u6c2f\u4e59\u70ef\u62a4\u5355\u82af\u5957\u7535\u529b\u7535\u7f06\u8ddd\u79bb\u8f83\u8fdc\u5b9c\u653e\u5927\u4e00\u6863\u89c4\u683c\uff0c\u5373\uff1a YJY 0.6/1kV 1\u00d7300 \u94dc\u82af\u4ea4\u8054\u805a\u4e59\u70ef\u7edd\u7f18\u805a\u6c2f\u4e59\u70ef\u62a4\u5957\u5355\u82af\u7535\u529b\u7535\u7f06\u6216\u8005YJLY 0.6/1kV 1\u00d7400 \u94dd\u82af\u4ea4\u8054\u805a\u4e59\u70ef\u7edd\u7f18\u805a\u6c2f\u4e59\u70ef\u62a4\u5355\u82af\u5957\u7535\u529b\u7535\u7f06\u6bcf\u76f8\u4e24\u6839\u7535\u7f06\u5e76\u8054\uff0cPEN\u4ee5\u4e00\u6839\uff0c\u5373\uff1a 3\u00d7\uff082\u00d7YJY 0.6/1kV 1\u00d7240 \uff09+1\u00d7\uff08YJY 0.6/1kV 1\u00d7240\uff09\u62163\u00d7\uff082\u00d7YJLY 0.6/1kV 1\u00d7300 \uff09+1\u00d7\uff08YJLY 0.6/1kV 1\u00d7300\uff09\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5373 3\u00d7\uff082\u00d7YJY 0.6/1kV 1\u00d7300 \uff09+1\u00d7\uff08YJY 0.6/1kV 1\u00d7300\uff09\u62163\u00d7\uff082\u00d7YJLY 0.6/1kV 1\u00d7400 \uff09+1\u00d7\uff08YJLY 0.6/1kV 1\u00d7400\uff09 2\u3001\u5f00\u5173\u9009\u62e9\u5b9c\u9009\u7528\u58f3\u67b6\u7b49\u7ea7\u7535\u6d411250A\u7684\u5851\u58f3\u65ad\u8def\u5668\uff0c\u4f8b\u5982\u6b63\u6cf0NM8-1250H/1000/3 \u6216\u8005\u9009\u7528\u58f3\u67b6\u7b49\u7ea7\u7535\u6d411600A\u7684\u4e07\u80fd\u5f0f\u65ad\u8def\u5668\uff0c\u4f8b\u5982\u6b63\u6cf0NA8\u7cfb\u5217\u4e07\u80fd\u5f0f\u65ad\u8def\u5668\uff0cNA8-1600/3\uff0c\u957f\u5ef6\u65f6\u6574\u5b9a\u8131\u6263\u7535\u6d411000A\u3002
三相380V 1000kW负载可选用5根3x240+1x120mm²VV型铜电缆并联使用。
1、三相380V 1000kW的电流 Ie
Ie=1000kW/（根号3x380Vx0.8）=1899A
2、根据Ie选择电缆截面积（以常用的VV型铜电缆为例）
经查，知3x240+1x120mm²截面电缆的载流量是408A。
使用5根并联，载流量是 408Ax5=2040A> Ie
3、结论
三相380V 1000kW负载可选用5根3x240+1x120mm²VV型铜电缆并联使用。
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