4千瓦电机，需几平方的电线？ 四千瓦的电机要用多少平方的电线
14\u5343\u74e6\u7684\u7535\u673a\u7528\u591a\u5c11\u5e73\u65b9\u7684\u7535\u7ebf\u5440\uff1f\u3000\u3000
\u3000\u300014\u5343\u74e6\u7684\u7535\u673a\u75286\u5e73\u65b9\u7684\u94dc\u7535\u7ebf\u3002
\u3000\u3000\u7535\u6d41\u4e3aI=P/(1.732Ucos\u03c6)=14/(1.732x0.38x0.75)=28.4A\uff08\u7528\u6807\u51c6\u4e09\u76f8\u5e02\u7535\u7535\u538b\u8ba1\u7b97\uff0ccos\u03c6\u662f\u8d1f\u8f7d\u529f\u7387\u56e0\u6570\uff0c\u4e00\u822c\u7535\u52a8\u673a\u53d60.75 \uff09\u3002
\u3000\u30001\u5e73\u65b9\u94dc\u7535\u7f06\u7684\u989d\u5b9a\u7535\u6d41\u4e3a6A\u3002\u56e0\u6b64\u7535\u7f06\u7684\u5e73\u65b9\u6570=28.4/6=4.7\u5e73\u65b9\u3002\u5de5\u7a0b\u4e0a\u7528\u7684\u94dc\u5bfc\u7ebf\uff0c\u4ee5\u622a\u9762\u79ef\uff08\u5e73\u65b9\u6beb\u7c73\uff09\u533a\u5206\u5176\u89c4\u683c\u6709\uff1a\uff081.5\uff1b2.5\uff1b4\uff1b6\uff1b10\uff1b16\uff1b25\uff1b35\uff1b50\uff1b70\uff1b95\uff1b120\uff1b150\uff1b185\uff09\u7b49\u3002\u56e0\u6b64\u53ef\u9009\u75286\u5e73\u65b9\u7684\u94dc\u7ebf\u3002\u5982\u679c\u7528\u94dd\u7ebf\uff0c\u900910\u5e73\u65b9\u7684\u3002
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\u3000\u3000\u56db\u5343\u74e6\u7684\u7535\u673a\u8981\u75281\u5e73\u65b9\u7684\u94dc\u7535\u7ebf\u3002
\u3000\u3000\u7531\u529f\u7387\u516c\u5f0fP=1.732UIcos\u03c6\u6709I=P/(1.732Ucos\u03c6)=4/(1.732x0.38x0.85)=7A(\u7528\u4e09\u76f8\u5e02\u7535\u8ba1\u7b97\uff0c\u529f\u7387\u56e0\u6570\u53d60.85)\u3002
\u3000\u3000\u6839\u636e\u53e3\u8bc0\uff0c\u4f30\u8ba1\u7535\u7f06\u572810\u5e73\u65b9\u4ee5\u4e0b\uff0c\u6545\u6bcf\u5e73\u65b9\u7684\u5b89\u5168\u7535\u6d41\u53d65A\uff0c\u6240\u9700\u7535\u7f06\u7684\u5e73\u65b9\u6570=7/5=1.4\u5e73\u65b9\u3002\u6839\u636e\u7535\u7f06\u89c4\u683c\u8868\uff0c\u53ef\u90091.5\u5e73\u65b9\u7684\u94dd\u7ebf\u62161\u5e73\u65b9\u7684\u94dc\u7ebf\u3002
\u3000\u3000\u6309\u7535\u6d41\u9009\u7535\u7f06\u53e3\u8bc0\uff1a
\u3000\u300010\u4e0b\u4e94\uff0c100\u4e0a\u4e8c\uff0c
\u3000\u300025\u300135\uff0c\u56db\u3001\u4e09\u754c\uff0c.
\u3000\u300070\u300195\uff0c\u4e24\u500d\u534a\u3002
\u3000\u3000\u7a7f\u7ba1\u3001\u6e29\u5ea6\uff0c\u516b\u3001\u4e5d\u6298\u3002
\u3000\u3000\u88f8\u7ebf\u52a0\u4e00\u534a\u3002
\u3000\u3000\u94dc\u7ebf\u5347\u7ea7\u7b97\u3002
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\u3000\u30001\u30011.5\u3001 2.5\u3001 4\u3001 6\u3001 10\u3001 16\u3001 25\u3001 35\u3001 50\u3001 70\u3001 95\u3001 120\u3001 150\u3001 185\u2026\u2026
\u3000\u3000\u7b2c\u4e00\u90e8\u5206
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\u3000\u3000\uff081\uff5e10\uff09\u5e73\u65b9\uff1a\u4e94\u500d
\u3000\u300016\u300125\u5e73\u65b9\uff1a\u56db\u500d
\u3000\u300035\u3001 50\u5e73\u65b9\uff1a\u4e09\u500d
\u3000\u300070\u300195\u5e73\u65b9\uff1a\u4e8c\u500d\u534a
\u3000\u3000120\u5e73\u65b9\u53ca\u4ee5\u4e0a\uff1a\u4e8c\u500d
\u3000\u3000\u7b2c\u4e8c\u90e8\u5206
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\u3000\u3000\u7b2c\u4e09\u90e8\u5206
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\u3000\u3000\u7b2c\u56db\u90e8\u5206
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\u3000\u3000
绛旓細鍦ㄥ崟鐩哥數涓紝4鍗冪摝鐢靛櫒鍙互浣跨敤4骞虫柟鐨勯摐鑺數绾锛屽崟鐩哥數鐢靛帇涓220V锛岀數娴佺瓑浜4000闄や互220绛変簬18.2A锛4骞虫柟閾滆姱鐢电嚎瀹夊叏杞芥祦閲忎负35A锛屽洜姝4鍗冪摝鐢靛櫒鍙娇鐢4骞虫柟閾滆姱鐢电嚎銆傚湪涓夌浉鐢典腑锛4鍗冪摝鐢靛櫒鍙娇鐢1.5骞虫柟鐨勯摐鑺數绾匡紝涓夌浉鐢垫満鍏紡I绛変簬P闄や互锛1.732ucos锛夌瓑浜4闄や互锛1.732涔樹互0.38涔樹互0.85锛夌瓑...
绛旓細鍥涘崈鐡︾殑鐢垫満瑕佺敤1骞虫柟鐨勯摐鐢电嚎銆傜敱鍔熺巼鍏紡P=1.732UIcos蠁鏈塈=P/(1.732Ucos蠁)=4/(1.732x0.38x0.85)=7A(鐢ㄤ笁鐩稿競鐢佃绠楋紝鍔熺巼鍥犳暟鍙0銆85)銆傛牴鎹彛璇锛屼及璁＄數缂嗗湪10骞虫柟浠ヤ笅銆傞摑鐢电紗鐨勬瘡骞虫柟鐨勫畨鍏ㄨ浇娴侀噺鍙ｈ瘈涓猴細鈥滀簩鐐逛簲涓嬩箻浠ヤ節锛屽線涓婂噺涓椤哄彿璧扳濊鐨勬槸2.5骞虫柟鍙婁互涓嬬殑鍚勭鎴潰閾...
绛旓細鍥涘崈鐡︾殑鐢垫満瑕佺敤1骞虫柟鐨勯摐鐢电嚎銆傜敱鍔熺巼鍏紡P=1.732UIcos蠁鏈塈=P/(1.732Ucos蠁)=4/(1.732x0.38x0.85)=7A(鐢ㄤ笁鐩稿競鐢佃绠楋紝鍔熺巼鍥犳暟鍙0.85)銆傛牴鎹彛璇锛屼及璁＄數缂嗗湪10骞虫柟浠ヤ笅锛屾晠姣忓钩鏂圭殑瀹夊叏鐢垫祦鍙5A锛屾墍闇鐢电紗鐨勫钩鏂规暟=7/5=1.4骞虫柟銆傛牴鎹數缂嗚鏍艰〃锛屽彲閫1.5骞虫柟鐨勯摑绾挎垨1骞虫柟鐨勯摐...
绛旓細鍗曠浉4鍗冪摝鐢垫満寤鸿浣跨敤4骞虫柟閾滅嚎鎴6骞虫柟閾濈嚎銆備笁鐩4鍗冪摝鐢垫満锛岀敤1.5骞虫柟閾滅嚎鍗冲彲銆
绛旓細4鍗冪摝380v鐢垫満闇瑕1.5骞虫柟鐨勭數缂嗙嚎銆傚湪涓夌浉骞宠 鐢佃矾锛屼竴鑸摐瀵肩嚎鐨勫畨鍏ㄨ浇娴侀噺涓5~8A/mm^2锛7.17梅8=0.89mm^2锛岀數缂嗘渶杩戠殑瑙勬牸涓1.5mm^2銆傜數鏈烘槸鎸囦緷鎹數纾佹劅搴斿畾寰嬪疄鐜扮數鑳借浆鎹㈡垨浼犻掔殑涓绉嶇數纾佽缃傜數鏈哄湪鐢佃矾涓槸鐢ㄥ瓧姣峂锛堟棫鏍囧噯鐢―锛夎〃绀猴紝瀹冪殑涓昏浣滅敤鏄骇鐢熼┍鍔ㄨ浆鐭╋紝浣滀负鐢ㄧ數鍣ㄦ垨鍚勭鏈烘...
绛旓細瀵逛簬涓涓4鍗冪摝鐨勪笁鐩鐢垫満锛閫氬父寤鸿浣跨敤2.5骞虫柟姣背鐨勭數缂銆備絾杩欏彧鏄竴涓ぇ鑷寸殑鎺ㄨ崘锛屽疄闄呴夋嫨杩闇瑕鑰冭檻鐢电紗鐨勯暱搴︺佸畨瑁呮潯浠躲佸厑璁哥殑鐢靛帇闄嶇瓑鍥犵礌銆傜數缂嗙殑鎴潰绉夋嫨鐩存帴鍏崇郴鍒扮數娴佺殑浼犺緭鑳藉姏鍜岀數缂嗙殑鍙戠儹鎯呭喌銆傚浜庝笁鐩哥數鏈猴紝鎴戜滑闇瑕佽冭檻鐨勬槸鐢垫満鐨勯瀹氱數娴佷互鍙婄數缂嗙殑瀹夊叏杞芥祦閲忋4鍗冪摝鐨勪笁鐩哥數鏈猴紝鍦ㄩ瀹...
绛旓細4鍗冪摝380v鐢垫満宸茬粡琛ㄦ槑锛屼笁鐧惧叓鍗佸害鐨勭數鏈虹敤涓夐」鐢碉紝鍏跺姛鐜囦负鍥涘崈鐡︺備娇鐢ㄩ摐绾垮崌绾ц绠楃敤鍗佷笅浜旂殑鎰忔濇潵璇达紝鍗佸钩鏂圭背浠ヤ笅鐨勪竴骞虫柟鍙互鎺ュ彈浜斾釜鐢垫祦锛屼笁椤圭數鐨勪竴鍗冪摝浼拌鏄袱涓數娴併傚湪杩欓噷锛屽洓鍗冪摝灏辨槸鍏釜鐢垫祦銆傚鏋滄寜1.5鐨勯摐绾垮崌绾ц绠楋紝鎸2.5骞虫柟涔樹互5鎰忓懗鐫12.5姣8澶氾紝灏卞彲浠ュ緱鍑鸿鐢1.5骞...
绛旓細涓鑸儏鍐典笅4鍗冪摝鐨勪笁鐩稿紓姝ョ數鍔ㄦ満鐨勭數娴佸彲浠ヨ揪鍒8瀹夊乏鍙筹紝鑰1骞虫柟姣背閾滆姱鐢电紗鍙互杩5瀹夌數娴侊紝1.5骞虫柟姣背閾滆姱鐢电紗鍙互杩7.5瀹夌數娴侊紝2.5骞虫柟姣背閾滆姱鐢电紗鍙互杩12.5瀹夌數娴侊紝鎵浠ョ敤2.5骞虫柟姣背閾滆姱鐢电紗灏辫冻澶熶簡銆
绛旓細380V锛4Kw鐢靛姩鏈哄彲閫夌敤 3x1.5骞虫柟閾滆姱鐢电紗銆傝绠楋細1銆佺數鏈虹殑棰濆畾鐢垫祦 4KW/(鈭3x380Vx0.8)鈮7.6A 2銆佹牴鎹數鏈虹殑棰濆畾鐢垫祦閫夋嫨鐢电紗鎴潰绉 (浠V鍨嬮摐鑺數缂嗕负渚)浠庝笂琛ㄥ彲鐭ワ紝3x1.5骞虫柟鐢电紗鐨勫畨鍏ㄨ浇娴侀噺鏄 17A锛堢┖姘斾腑鏁疯锛夊拰22A锛堝煁鍦版暦璁撅級锛岄兘澶т簬7.6A銆傛墍浠ュ彲閫夋嫨銆
绛旓細4鍗冪摝鐢靛櫒鍦ㄥ崟鐩哥數涓彲浠ヤ娇鐢4骞虫柟鐨勯摐鑺數绾銆傚崟鐩哥數鐢靛帇涓220V锛岀數鍣ㄧ數娴侊紳4000梅220鈮18.2A銆傜數鍣ㄧ殑鍚姩鐢垫祦涓鑸細瓒呰繃棰濆畾鐢垫祦锛屽鏋滃惎鍔ㄧ數娴佷负棰濆畾鐢垫祦1.3鍊嶏紝鍒18脳1.3=23.4A锛屾渶杩戠殑寮鍏宠鏍间负30A銆2.5骞虫柟閾滆姱鐢电嚎瀹夊叏杞芥祦閲忎负28A锛4骞虫柟閾滆姱鐢电嚎瀹夊叏杞芥祦閲忎负35A锛屽洜姝4鍗冪摝鐢靛櫒鍙娇鐢4...
