三相十二千瓦距离八百米需多粗铝线 四百千瓦电机距离300米用多大铝线
13\u5343\u74e6\u4e09\u76f8\u7535\u52a8\u673a\u8ddd\u79bb\u4e00\u767e\u7c73\u5e94\u8be5\u7528\u591a\u7c97\u7684\u94dd\u7ebf\uff0c\u600e\u4e48\u7b97\u6cd5\uff0c\u80fd\u544a\u8bc9\u6211\u8be6\u7ec6\u7684\u516c\u5f0f13KW\u7535\u6d41\u662f26A\u97006\u5e73\u65b9\u94dd\u7ebf\uff0c\u4f46100\u7c73\u7ebf\u957f\u6c42\u538b\u964d\u3002\u5148\u6c42\u7535\u963b\uff0cr=\u957f\u5ea6x\u7535\u7387\u7cfb\u65700\uff0c0283/6=0\uff0c47\u6b27\u300226x0\uff0c47=12\uff0c2\u4f0f\u538b\u964d\u3002\u53ef\u514d\u5f3a\u4f7f\u7528\u3002\u82e510\u5e73\u65b9\u6700\u597d\u3002
500\u7c73\u7684\u8f93\u9001\u8ddd\u79bb\uff0c\u603b\u529f\u7387\u4e3a100KW\uff0c\u91c7\u7528\u4e09\u76f8\u4e94\u7ebf\u5236\u7ed9\u7535\u673a\u7ec4\u4f9b\u7535\uff0c\u9009\u7528150mm²\u7684\u94dd\u82af\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u5bfc\u7ebf\uff0c\u5373\uff1aBLV-3\u00d7150+2\u00d770\u3002\u3000\u30004\u53f0\u7535\u673a\u7684\u603b\u529f\u7387\uff1a25000\u00d74\uff1d100000W\uff0c\u8ba1\u7b97\u4e09\u76f8\u4f9b\u7535\u7535\u6d41\u8ba1\u7b97\uff1aIjs=P/U/\u221a3/cos\u03c6=100000/380/1.732/0.85\u2248178.8A\uff1b\u6839\u636e\u5bfc\u7ebf\u5b89\u5168\u622a\u6d41\u91cf\u6765\u9009\u62e9\u5bfc\u7ebf\uff0c\u8003\u8651\u73af\u5883\u56e0\u7d20\u548c\u6577\u8bbe\u65b9\u5f0f\u7684\u5f71\u54cd\u755920\uff05\u7684\u4f59\u91cf\uff0c\u5373\uff1a178.8\u00d7\uff081+20\uff05\uff09\u2248214.6A\uff1b\u5728\u4e0d\u8003\u8651\u7ebf\u8def\u538b\u964d\u56e0\u7d20\u4e0b\u3001\u9009\u752895mm²\u94dd\u82af\u805a\u6c2f\u4e59\u70ef\u7edd\u7f18\u7535\u7ebf\u5c31\u53ef\u4ee5\u4e86\uff0c\u5b83\u7684\u5b89\u5168\u622a\u6d41\u91cf\u90fd\u662f250A\uff0c\u6211\u4eec\u518d\u901a\u8fc7\u538b\u964d\u8ba1\u7b97\u6765\u8bba\u8bc1\u3002500\u7c73\u7684\u8f93\u9001\u8ddd\u79bb\u8f83\u8fdc\uff0c\u6211\u4eec\u8981\u6838\u5b9e\u4e00\u4e0b\u662f\u5426\u6ee1\u8db3\u8981\u6c42\uff0c\u6839\u636eGB50052-1995\u300a\u4f9b\u914d\u7535\u7cfb\u7edf\u8bbe\u8ba1\u89c4\u8303\u300b\u4e2d\u76f8\u5173\u8981\u6c42\u7535\u538b\u504f\u5dee\u4e3a\u00b15\uff0c380V\u5141\u8bb8\u538b\u964d\u4e3a19V\u3002\u0394R=U/I=19/178.8\u22480.1063\u03a9\u94dd\u82af\u7ebf\uff1aS=\u03c1\u00d7L/R=0.0285\u00d7500/0.1063\u2248134.1mm²\uff0c150mm²\u94dd\u82af\u7ebf\u80fd\u6ee1\u8db3\u8981\u6c42\u3002
假设功率因数是0.8，电压380V，则电流是22.8A。距离800米，若用架空铝线，考虑到压降，需要用LG-25mm²的
绛旓細璺濈800绫锛岃嫢鐢ㄦ灦绌洪摑绾匡紝鑰冭檻鍒板帇闄嶏紝闇瑕佺敤LG-25mm²鐨
绛旓細R锛漊/I锛10/16鈮0.0.625(惟)姣忔牴涓夌浉閾鐢电嚎鎴潰(閾濈數绾跨數闃荤巼涓0.0283)锛歋锛澫伱桳/R锛0.0283脳800/0.625鈮36(m銕)缁忚绠楅渶瑕侀夋嫨36骞虫柟鐨勯摑鑺數缂嗭紝娌℃湁36杩欎釜瑙勬牸锛屽彲浠ラ夋嫨35骞虫柟鐨勯摑蹇冪數缂嗐
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绛旓細婊¤浇鐢垫祦澶х害鏄20A宸﹀彸锛璺濈杩戠殑璇濋摐绾块渶瑕6.6骞虫柟銆傞摑绾块渶瑕11骞虫柟鍗冲彲锛屼絾鏄窛绂昏繙锛岀嚎涓婄殑鎹熻楁垜浠笉寰椾笉鑰冭檻锛岀嚎寰勭矖绾夸笂鐨勬崯鑰楁墠浼氬皬锛岃兘閲忔秷鑰楀氨灏忥紝鏁堢巼灏遍珮锛屽缓璁摐绾10骞虫柟锛岄摑绾20骞虫柟銆
绛旓細瑕35鐨勭嚎锛屾渶灏戜篃瑕25骞虫柟 涓鍗冪摝鐢垫満鍗曢」|涓夌浉 鍗曢」涔4.5 銆1脳4.5=4.5A銆戙涓夌浉涔2銆1脳2=2A銆戙傞摑鑺數绾胯浇娴侀噺锛10涓嬩簲銆1脳5=5A 1.5脳5=7.5A 2.5脳5=12.5A銆戯紝閾滅嚎鍗囩骇绠椼1骞虫柟姣背鐨勯摐鑺绾胯浇娴侀噺涓7.5A 1.5骞虫柟鐨勫绾胯浇娴侀噺涓12.5A銆戙
绛旓細鎸夌収浣犺鐨勬儏鍐碉紝璁＄畻缁撴灉濡備笅 鐢垫祦绾100A锛岃兘甯﹀ぇ绾50KW鐨勮礋鑽
绛旓細涓夌櫨鍏崄浼忕殑鐢垫簮锛岄暱搴︿竴鐧剧背鍐咃紝涓骞虫柟姣背閾濈嚎閫夋嫨甯﹀姩涓鍗冪摝锛鍏櫨鍗冪摝闇瑕佸叓鐧骞虫柟姣背鐨勯摑绾裤傚叓鐧惧崈鐡︾殑鐢靛姩鏈哄簲璇ラ厤鐢ㄩ珮鍘嬬數鏈猴紝鐢ㄤ笁鐧惧叓鍗佷紡鐨勭數婧愮敤绾垮お绮椾簡銆
绛旓細濡傛灉閲囩敤鍦板煁鏂瑰紡鐢閾鑺數缂嗗疁閲囩敤240mm2浠ヤ笂,濡傛灉閲囩敤鏋剁┖鏂瑰紡瀹滈噰鐢ㄩ摑缁炵嚎120mm2浠ヤ笂.
绛旓細150KW鐨勭數鍔ㄦ満锛屽叾瑙嗗湪鍔熺巼183KVA锛屽彉鍘嬪櫒瀹归噺鑳藉婊¤冻闇瑕併傚叧浜95骞虫柟鐨勯摑瀵肩嚎鏄惁鍚堥傦紝闇瑕佽繘琛岀數鍔涚嚎璺绾垮帇闄嶆牎楠岃绠椼傛垜鐨勮绠楃粨鏋滄槸9524.83%骞虫柟鐨勯摑瀵肩嚎绾胯矾鍘嬮檷涓24.83%锛屽嵆绾胯矾鏈鐢靛帇涓300V銆備笉鑳戒娇鐢95骞虫柟閾濆绾裤
绛旓細鍘氬害鍏绫筹紝瀹藉害鍏崄姣背鐨閾鎺掞紝鎴潰绉槸涓夌櫨鍏崄骞虫柟姣背锛屽彲閫夋嫨鐢垫祦瀵嗗害鍥涜嚦浜斿畨锛屾寜鍥涚偣浜旂殑鐢垫祦瀵嗗害璁＄畻锛6*60=360*4.5=1620/2=810锛夊彲浠ュ甫鍔鍏櫨涓鍗佷釜鍗冪摝宸﹀彸鐨勭殑鐢ㄧ數鍣ㄨ繛缁伐浣 銆
