电缆线径计算 电缆线径计算公式
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\u5de5\u4f5c\u7535\u6d41\u53ca\u8ba1\u7b97\u3000\u3000
\u7535(\u7ebf)\u7f06\u5de5\u4f5c\u7535\u6d41\u8ba1\u7b97\u516c\u5f0f\uff1a
\u5355\u76f8
I=P\u00f7(U\u00d7cos\u03a6)
P-\u529f\u7387(W);U-\u7535\u538b(220V);cos\u03a6-\u529f\u7387\u56e0\u7d20(0.8);I-\u76f8\u7ebf\u7535\u6d41(A)
\u4e09\u76f8
I=P\u00f7(U\u00d71.732\u00d7cos\u03a6)
P-\u529f\u7387(W);U-\u7535\u538b(380V);cos\u03a6-\u529f\u7387\u56e0\u7d20(0.8);I-\u76f8\u7ebf\u7535\u6d41(A)
\u4e00\u822c\u94dc\u5bfc\u7ebf\u7684\u5b89\u5168\u622a\u6d41\u91cf\u4e3a5-8A/\u5e73\u65b9\u6beb\u7c73\uff0c\u94dd\u5bfc\u7ebf\u7684\u5b89\u5168\u622a\u6d41\u91cf\u4e3a3-5A/\u5e73\u65b9\u6beb\u7c73\u3002
\u5728\u5355\u76f8220V\u7ebf\u8def\u4e2d\uff0c\u6bcf1KW\u529f\u7387\u7684\u7535\u6d41\u57284-5A\u5de6\u53f3\uff0c\u5728\u4e09\u76f8\u8d1f\u8f7d\u5e73\u8861\u7684\u4e09\u76f8\u7535\u8def\u4e2d\uff0c\u6bcf1KW\u529f\u7387\u7684\u7535\u6d41\u57282A\u5de6\u53f3\u3002
\u4e5f\u5c31\u662f\u8bf4\u5728\u5355\u76f8\u7535\u8def\u4e2d\uff0c\u6bcf1\u5e73\u65b9\u6beb\u7c73\u7684\u94dc\u5bfc\u7ebf\u53ef\u4ee5\u627f\u53d71KW\u529f\u7387\u8377\u8f7d\uff1b\u4e09\u76f8\u5e73\u8861\u7535\u8def\u53ef\u4ee5\u627f\u53d72-2.5KW\u7684\u529f\u7387\u3002
\u4f46\u662f\u7535\u7f06\u7684\u5de5\u4f5c\u7535\u6d41\u8d8a\u5927\uff0c\u6bcf\u5e73\u65b9\u6beb\u7c73\u80fd\u627f\u53d7\u7684\u5b89\u5168\u7535\u6d41\u5c31\u8d8a\u5c0f\u3002
\u7535\u7f06\u5141\u8bb8\u7684\u5b89\u5168\u5de5\u4f5c\u7535\u6d41\u53e3\u8bc0\uff1a
\u5341\u4e0b\u4e94\uff08\u5341\u4ee5\u4e0b\u4e58\u4ee5\u4e94\uff09
\u767e\u4e0a\u4e8c \uff08\u767e\u4ee5\u4e0a\u4e58\u4ee5\u4e8c\uff09
\u4e8c\u4e94\u4e09\u4e94\u56db\u4e09\u754c\uff08\u4e8c\u4e94\u4e58\u4ee5\u56db,\u4e09\u4e94\u4e58\u4ee5\u4e09\uff09
\u4e03\u96f6\u4e5d\u4e94\u4e24\u500d\u534a\uff08\u4e03\u96f6\u548c\u4e5d\u4e94\u7ebf\u90fd\u4e58\u4ee5\u4e8c\u70b9\u4e94\uff09
\u7a7f\u7ba1\u6e29\u5ea6\u516b\u4e5d\u6298\uff08\u968f\u7740\u6e29\u5ea6\u7684\u53d8\u5316\u800c\u53d8\u5316,\u5728\u7b97\u597d\u7684\u5b89\u5168\u7535\u6d41\u6570\u4e0a\u4e58\u4ee5\u96f6\u70b9\u516b\u6216\u96f6\u70b9\u4e5d\uff09
\u94dc\u7ebf\u5347\u7ea7\u7b97\uff08\u5728\u540c\u622a\u9762\u94dd\u82af\u7ebf\u7684\u57fa\u7840\u4e0a\u5347\u4e00\u7ea7,\u5982\u4e8c\u70b9\u4e94\u94dc\u82af\u7ebf\u5c31\u662f\u5728\u4e8c\u70b9\u4e94\u94dd\u82af\u7ebf\u4e0a\u5347\u4e00\u7ea7,\u5219\u6309\u56db\u5e73\u65b9\u6beb\u7c73\u94dd\u82af\u7ebf\u7b97\uff09
\u88f8\u7ebf\u52a0\u4e00\u534a\uff08\u5728\u539f\u5df2\u7b97\u597d\u7684\u5b89\u5168\u7535\u6d41\u6570\u57fa\u7840\u4e0a\u518d\u52a0\u4e00\u534a\uff09
\u5176\u4ed6\uff1a
1.\u5bfc\u7ebf\u622a\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f(\u5bfc\u7ebf\u8ddd\u79bb/\u538b\u964d/\u7535\u6d41\u5173\u7cfb)
\u94dc\u7ebf S=IL\u00f7(54.4\u00d7U)\u94dd\u7ebf S=IL\u00f7(34\u00d7U)
I-\u5bfc\u7ebf\u4e2d\u901a\u8fc7\u7684\u6700\u5927\u7535\u6d41(A); L-\u5bfc\u7ebf\u957f\u5ea6(m);U-\u5141\u8bb8\u7684\u538b\u964d(V);S-\u5bfc\u7ebf\u7684\u622a\u9762\u79ef(\u5e73\u65b9\u6beb\u7c73)
2.\u7535\u7ebf\u7ebf\u7f06\u57fa\u7840\u77e5\u8bc6
1.\u7535\u7ebf\u4e00\u624e\u957f\u5ea6:100\u7c73,\u6b63\u8d1f\u8bef\u5dee0.5\u7c73;
2.\u7535\u7ebf\u578b\u53f7:BV\u5355\u80a1,BVR\u591a\u80a1,BVV\u53cc\u80f6\u5355\u80a1,BVVR\u53cc\u80f6\u591a\u80a1;
3.\u7535\u7ebf\u5e38\u7528\u89c4\u683c:1\u5e73\u65b9/1.5\u5e73\u65b9/2.5\u5e73\u65b9/4\u5e73\u65b9/6\u5e73\u65b9/10\u5e73\u65b9\u7b49;
4.BV/BVR\u533a\u522b:BV\u4e3a\u5355\u82af\u7ebf,BVR\u4e3a\u591a\u80a1,BVR\u6bd4BV\u8d3510%\u5de6\u53f3;
5.BVR\u6bd4BV\u7684\u597d\u5904:a\u6c34\u7535\u65bd\u5de5\u65b9\u4fbf.b\u5728\u677f\u5f2f\u65f6\u4e0d\u6613\u628a\u7ebf\u6298\u65ad;
6.\u56fd\u6807GB4706.1-1992/1998\u89c4\u5b9a\u7684\u7535\u7ebf\u8d1f\u8f7d\u7535\u6d41\u503c\uff08\u90e8\u5206\uff09
7.\u5bb6\u5ead\u7535\u8def\u8bbe\u8ba1\uff0c2000\u5e74\u524d\uff0c\u7535\u8def\u8bbe\u8ba1\u4e00\u822c\u662f\uff1a\u8fdb\u6237\u7ebf4\u20146 mm2\uff0c\u7167\u660e1.5 mm2\uff0c\u63d2\u5ea72.5 mm2\uff0c\u7a7a\u8c034 mm2\u4e13
\u7ebf\u30022000\u5e74\u540e\uff0c\u7535\u8def\u8bbe\u8ba1\u4e00\u822c\u662f\uff1a\u8fdb\u6237\u7ebf6\u201410 mm2\uff0c\u7167\u660e2.5 mm2\uff0c\u63d2\u5ea74 mm2\uff0c\u7a7a\u8c036 mm2\u4e13\u7ebf\u3002
8.\u7535\u7ebf\u91cd\u91cf:1.5\u5e73\u65b9\u7ea6\u91cd2.2\u516c\u65a4,2.5\u7ea6\u91cd3.2\u516c\u65a4,4\u5e73\u65b9\u7ea6\u91cd4.8\u516c\u65a4,6\u5e73\u65b9\u7ea6\u91cd6.5\u516c\u65a4\u3002
9.\u7535\u7ebf2.5\u5e73\u65b9\u4ee5\u4e0b\u7684\u591a\u80a1\u7ebf(1\u5e73\u65b9,1.5\u5e73\u65b9)\u5305\u88c5\u6807\u8bc6\u4e3aBV(B),\u5355\u80a1\u5219\u4e3aBV
10.\u7535\u7ebf\u989c\u8272\u6709:\u7ea2\u8272,\u9ec4\u8272,\u84dd\u8272,\u7eff\u8272,\u9ed1\u8272,\u9ec4\u7eff\u8272(\u5730\u7ebf)
\u5bfc\u7ebf\u622a\u9762\u79efS=\u03c1\uff08L/R\uff09 \u7535\u963bR=U/I
\u5f0f\u4e2d\u03c1\u4e3a\u5bfc\u7ebf\u7535\u963b\u7387\uff0cL\u4e3a\u5bfc\u7ebf\u957f\u5ea6\uff0cR\u4e3a\u7535\u963b\uff0cU\u4e3a\u7535\u538b\uff0cI\u4e3a\u7535\u6d41\u3002
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1140A\u53ef\u4ee5\u9009\u7528630\u5e73\u65b9\uff08\u5b89\u5168\u8f7d\u6d41\u91cf1250A\uff09\u7535\u7f06\uff0c\u6216\u8005240\u5e73\u65b9\uff08\u5b89\u5168\u8f7d\u6d41\u91cf660A\uff09\u4e8c\u7ec4\uff0c\u6216\u8005120\u5e73\u65b9\uff08\u5b89\u5168\u8f7d\u6d41\u91cf375~400A\uff09\u4e09\u7ec4\u3002
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测量直径当然是铜线的外径，外部绝缘层怎么能包含在里面，厚薄也不等。
铜线的截面积就是圆面积：半径×半径×3.14=？
75是指该导线截面积，截面积 是铜的截面，计算直径得看干啥，如果是安装直径就是包含外皮的，如果是导线截面积直径自然是铜线的
绛旓細閫氬父鍙互灏嗗绾跨殑鎴潰绉櫎浠ュ绾胯偂鏁帮紝鍐嶉櫎浠3.14鍚庡紑骞虫柟锛屽叾鍊间箻浠2灏卞彲浠ョ畻鍑虹嚎寰銆傜敤鍗冨垎灏烘娴嬬嚎寰勫ぇ灏忔寜鍓嶉潰姝ラ鍙嶇畻灏卞彲浠ユ眰鍑哄绾挎埅闈㈤潰绉傚1.5骞虫柟鐙偂閾滅嚎绾垮緞1.38mm,璁＄畻(1.38/2)脳(1.38/2)脳3.14脳1鑲=1.494954骞虫柟锛岃繖灏辨槸鍚堟牸鐨勫浗鏍囩嚎寰勩傜數缂嗙嚎寰勭殑璁＄畻锛氬绾挎埅闈㈢НS=...
绛旓細绾垮緞鐨勮绠楁柟娉曟槸锛氶摐绾匡細 S= IL / 54.4*U`锛涢摑绾匡細 S= IL / 34*U`鐢电紗鎴潰浼扮畻鏂规硶 1銆佺敤閫 杩欐槸鏍规嵁鐢ㄧ數璁惧鐨勫姛鐜囷紙鍗冪摝鎴栧崈浼忓畨锛夌畻鍑虹數娴侊紙瀹夛級鐨勫彛璇銆傜數娴佺殑澶у皬鐩存帴涓庡姛鐜囨湁鍏筹紝涔熶笌鐢靛帇銆佺浉鍒佸姏鐜囷紙鍙堢О鍔熺巼鍥犳暟锛夌瓑鏈夊叧銆備竴鑸湁鍏紡鍙緵璁＄畻銆傜敱浜庡伐鍘傚父鐢ㄧ殑閮芥槸380/220浼忎笁...
绛旓細鐢电紗绾垮緞鐢辩嚎璺帇闄嶅喅瀹 瀵肩嚎鎴潰绉绠楀叕寮忎负锛歋=(If*L)/(r*螖V)If锛氬绾夸腑鏈澶х數娴(瀹)锛汱锛氬绾块暱搴(绫)锛岀瓑浜庤窛绂荤殑2鍊嶏紱r锛氱數瀵肩巼锛堢數闃荤巼鐨勫掓暟),閾滃彇57锛岄摑鍙34 螖V锛氬绾胯瀹氬帇闄(浼)锛-48V鏃跺彇3.2V锛汼锛氬绾挎埅闈㈢Н(骞虫柟姣背)銆傚洜姝ゅ彧瑕佽绠楀嚭璐熻浇鐢垫祦锛屾祴绠楀嚭鎵闇瀵肩嚎璺濈锛屽氨...
绛旓細棣栧厛瑕佺煡閬撶數缂嗙嚎鐨勭洿寰勮绠楀叕寮忥細鐩村緞=锛堥潰绉紙鍗冲钩鏂规暟锛壝3.14锛壝2 鎵浠ワ紝15骞虫柟鐨勭數缂嗙嚎鐩村緞涓猴細锛15梅3.14锛壝2鈮9.5541锛岄氬父鐢电嚎鐨勭洿寰勫彇鍊间繚鐣欎袱浣嶅皬鏁帮紝鏁15骞虫柟鐨勭數绾跨洿寰勬槸9.55銆20骞虫柟鐨勭數缂嗙嚎鐩村緞涓猴細锛20梅3.14锛壝2鈮12.74 ...
绛旓細1骞虫柟鐨勭數缂嗙嚎鐨勭洿寰勪负1.13姣背銆傚叿浣撹绠楄繃绋嬶細鍥犱负鐢电紗绾垮钩鏂规暟锛堝钩鏂规绫筹級锛鍗崇數缂嗙嚎鐨勬埅闈㈢Н锛濆渾鍛ㄧ巼锛3.14锛壝楃數缂嗙嚎鍗婂緞锛堟绫筹級鐨勫钩鏂锛屾墍浠1骞虫柟鐨勭數缂嗙嚎鍗婂緞鐨勫钩鏂癸紳1/3.14锛0.318锛堝钩鏂规绫筹級鍒1骞虫柟鐨勭數缂嗙嚎鐨勭洿寰勶紳2*鈭0.318锛1.13锛堟绫筹級鐢电紗绾跨殑閫夎喘甯歌瘑 1銆佸療鐪"CCC"璁よ瘉鏍囪瘑銆
绛旓細绾寰绾0.618mm銆0.3骞虫柟鐨鐢电紗琛ㄧず妯埅闈㈢Н涓0.3骞虫柟姣背銆傜數缂嗙殑妯埅闈㈢Н鍙互鐪嬫垚鏄竴涓渾锛屽渾鐨勯潰绉=蟺r²锛屽叾涓璻灏辨槸鍦嗙殑鍗婂緞锛2r涔熷氨鏄嚎寰勩0.3=3.14脳r²锛岃В寰梤=0.309锛岃繘鑰屽彲寰2r=0.618mm銆
绛旓細鐢电嚎澶氬皯骞虫柟鎸囩殑鏄鐢电嚎鐨勬í鎴潰绉紝濡傛灉鏄崟鑺殑灏卞彲浠ラ噺涓涓嬪叾鐩村緞锛岀劧鍚庡緱鍑哄崐寰勩傚叾娆¤鐭ラ亾鐢电紗绾跨殑鐩村緞璁＄畻鍏紡锛鐩村緞=锛堥潰绉紙鍗冲钩鏂规暟锛壝3.14锛壝2 鎵浠ワ紝15骞虫柟鐨勭數缂嗙嚎鐩村緞涓猴細锛15梅3.14锛壝2鈮9.5541锛岄氬父鐢电嚎鐨勭洿寰勫彇鍊间繚鐣欎袱浣嶅皬鏁帮紝鏁15骞虫柟鐨勭數绾跨洿寰勬槸9.55銆20骞虫柟鐨勭數缂嗙嚎...
绛旓細鐢(绾)缂嗗伐浣滅數娴璁＄畻鍏紡锛氬崟鐩 I=P梅(U脳cos桅)P-鍔熺巼(W);U-鐢靛帇(220V);cos桅-鍔熺巼鍥犵礌(0.8);I-鐩哥嚎鐢垫祦(A)涓夌浉 I=P梅(U脳1.732脳cos桅)P-鍔熺巼(W);U-鐢靛帇(380V);cos桅-鍔熺巼鍥犵礌(0.8);I-鐩哥嚎鐢垫祦(A)涓鑸摐瀵肩嚎鐨勫畨鍏ㄦ埅娴侀噺涓5-8A/骞虫柟姣背锛岄摑瀵肩嚎鐨勫畨鍏ㄦ埅娴侀噺涓3-5A/...
绛旓細鏈夊叧鐢电紗绾垮緞銆佹埅闈㈢Н銆侀噸閲忎及绠楀叕寮 涓銆佷及绠楅摐銆侀搧銆侀摑绾跨殑閲嶉噺锛坘g/km锛夐噸閲=鎴潰绉楁瘮閲 S=鎴潰绉紙mm2锛1. 閾滅嚎 W=9S W=閲嶉噺锛坘g锛2. 閾濈嚎 W=3S d=绾垮緞锛坢m锛3. 閾佷笣 W=8S 瀹為檯閾滅殑姣旈噸8.9g/cm3銆侀摑鐨勬瘮閲2.7g/cm3銆侀搧鐨勬瘮閲7.8g/cm3 浜屻 鎸夌嚎寰勪及绠楅噸閲忥紙...
绛旓細鐢电紗绾垮緞鐨勭簿纭璁＄畻 瀵逛簬鐩存祦鐢垫簮绾匡紝绾垮緞鐨勮绠楀苟涓嶇畝鍗曘傚叕寮廠 = I脳L梅(K脳鈻砎)涓烘垜浠彁渚涗簡涓涓寚瀵硷紝鍏朵腑S浠ｈ〃绾垮緞锛孖鏄數娴侊紝L鏄洖璺暱搴︼紝K鏄鐢电巼锛岃屸柍V閫氬父鍙2.6V锛岃繖鏍锋垜浠氨鑳藉噯纭湴璁＄畻鍑烘弧瓒抽渶姹傜殑绾垮緞銆傛瘡涓绾垮緞鐨勯夋嫨锛岄兘鍏充箮鐢垫祦鐨勬祦鍔ㄦ晥鐜囷紝鍔熺巼鐨勪紶杈撶ǔ瀹氾紝浠ュ強璁惧鐨勫彲闈...
