多芯铝合金240电缆直径多大 240平方电缆直径 240的电缆直径是多大
240\u5e73\u65b9\u7684\u7535\u7f06\u76f4\u5f84\u662f\u591a\u5927\uff1f240\u5e73\u65b9\u7684\u7535\u7f06\u76f4\u5f84\u662f17.48\u6beb\u7c73\u3002
240\u5e73\u65b9\u7684\u7535\u7f06\u7684\u7535\u7f06\u6307\u7684\u662f\u6a2a\u622a\u9762\u79ef\u4e3a240\u5e73\u65b9\u6beb\u7c73\u7684\u7535\u7f06\u3002
\u56e0\u4e3a\u7535\u7f06\u7684\u6a2a\u622a\u9762\u90fd\u662f\u5706\u5f62\u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528\u5706\u7684\u9762\u79ef\u516c\u5f0f\u8ba1\u7b97\u51fa\u7535\u7f06\u7684\u76f4\u5f84\u5927\u5c0f\u3002
\u6839\u636e\u5706\u7684\u9762\u79ef\u516c\u5f0f\uff1aS=\u03c0r²\u5373240=3.14*r²\uff0c\u6240\u4ee5\u7535\u7f06\u7684\u534a\u5f84r=8.74\u6beb\u7c73\u3002
\u518d\u6839\u636e\u5706\u7684\u76f4\u5f84\u516c\u5f0f\uff1ad=2r\uff0c\u6240\u4ee5\u7535\u7f06\u7684\u76f4\u5f84d=2r=2*8.74=17.48\u6beb\u7c73\u3002
\u6269\u5c55\u8d44\u6599
\u5706\u7684\u5468\u957f\u8ba1\u7b97\u516c\u5f0f
C=2\u03c0r=\u03c0d
\u5706\u5468\u957f\u7684\u4e00\u534a c=\u03c0r
\u534a\u5706\u7684\u5468\u957f c=\u03c0r+2r
\u5706\u7684\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f
s=\u03c0r²
\u5f27\u957f\u89d2\u5ea6\u516c\u5f0f
\u6247\u5f62\u5f27\u957fL=\u5706\u5fc3\u89d2\uff08\u5f27\u5ea6\u5236\uff09\u00d7R= n\u03c0R/180\uff08\u03b8\u4e3a\u5706\u5fc3\u89d2\uff09\uff08R\u4e3a\u6247\u5f62\u534a\u5f84\uff09
\u6247\u5f62\u9762\u79efS=n\u03c0 R²/360=LR/2\uff08L\u4e3a\u6247\u5f62\u7684\u5f27\u957f\uff09
\u5706\u9525\u5e95\u9762\u534a\u5f84 r=nR/360\uff08r\u4e3a\u5e95\u9762\u534a\u5f84\uff09\uff08n\u4e3a\u5706\u5fc3\u89d2
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u5706\u5f62
240\u5e73\u65b9\u7684\u9ad8\u538b\u7535\u7f06\u662f\u6307240\u5e73\u65b9\u6beb\u7c733.14rr=240rr=79.73\u5e73\u65b9\u6beb\u7c73r=\u6839\u53f779.73=8.74\u6beb\u7c73\u76f4\u5f84=8.74X2=17.48\u6beb\u7c73
\u8ba1\u7b97\u65b9\u6cd5\uff1a
1\u3001 \u77e5\u9053\u7535\u7ebf\u7684\u5e73\u65b9\uff0c\u8ba1\u7b97\u7535\u7ebf\u7684\u534a\u5f84\u7528\u6c42\u5706\u5f62\u9762\u79ef\u7684\u516c\u5f0f\u8ba1\u7b97\uff1a\u7535\u7ebf\u5e73\u65b9\u6570\uff08\u5e73\u65b9\u6beb\u7c73\uff09\uff1d\u5706\u5468\u7387\uff083.14\uff09\u00d7\u7535\u7ebf\u534a\u5f84\uff08\u6beb\u7c73\uff09\u7684\u5e73\u65b9
2\u3001 \u77e5\u9053\u7535\u7ebf\u7684\u76f4\u5f84\uff0c\u8ba1\u7b97\u7535\u7ebf\u7684\u5e73\u65b9\u4e5f\u7528\u6c42\u5706\u5f62\u9762\u79ef\u7684\u516c\u5f0f\u6765\u8ba1\u7b97\uff1a\u7535\u7ebf\u7684\u5e73\u65b9\uff1d\u5706\u5468\u7387\uff083.14\uff09\u00d7\u7ebf\u76f4\u5f84\u7684\u5e73\u65b9\uff0f4\u7535\u7f06\u5927\u5c0f\u4e5f\u7528\u5e73\u65b9\u6807\u79f0\uff0c\u591a\u80a1\u7ebf\u5c31\u662f\u6bcf\u6839\u5bfc\u7ebf\u622a\u9762\u79ef\u4e4b\u548c\u3002\u7535\u7f06\u622a\u9762\u79ef\u7684\u8ba1\u7b97\u516c\u5f0f\uff1a0.7854 \u00d7 \u7535\u7ebf\u534a\u5f84\uff08\u6beb\u7c73\uff09\u7684\u5e73\u65b9 \u00d7 \u80a1\u6570\u598248\u80a1\uff08\u6bcf\u80a1\u7535\u7ebf\u534a\u5f840.2\u6beb\u7c73\uff091.5\u5e73\u65b9\u7684\u7ebf\uff1a0.7854 \u00d7\uff080.2 \u00d7 0.2\uff09\u00d7 48 = 1.5\u5e73\u65b9
3\u3001\u6210\u7f06\u5916\u5f84+\u5916\u88ab\u539a\u5ea6\u6210\u7f06\u5916\u5f84\uff1aK*D 2\u82af K=23\u82af K=2.164\u82af K=2.425\u82af K=2.76\u82af K=3.07\u82af K=3.0
比如:
YJHLV-0.6/1kV-3*240mm2的电缆近似直径是65.6 mm
YJHLV-3.6/6kV-3*240mm2的电缆近似直径是66.8 mm
YJHLV22-0.6/1kV-3*240mm2的电缆近似直径是71.1 mm
YJHLV22-3.6/6kV-3*240mm2的电缆近似直径是67.2 mm
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