铜线压降计算 电缆电压压降如何计算？
\u94dc\u82af\u7ebf\u538b\u964d\u5982\u4f55\u8ba1\u7b97\uff1f\u6839\u636e\u94dc\u7ebf\u622a\u9762\u79ef\u3001\u957f\u5ea6\u53ca\u94dc\u7684\u7535\u963b\u7387\uff0c\u8ba1\u7b97\u51fa\u94dc\u7ebf\u7684\u7535\u963b\uff0c\u7535\u6d41\u4e58\u4ee5\u7535\u963b\u5c31\u662f\u94dc\u7ebf\u76f8\u538b\u964d\uff0c\u518d\u4e58\u4ee51.732\u5c31\u662f\u7ebf\u538b\u964d\u3002
\u4e0d\u540c\u6e29\u5ea6\u4e0b\uff0c\u94dc\u7684\u7535\u963b\u7387\u4e0d\u540c\uff0c\u901a\u5e38\u4f30\u7b97\u91c7\u7528\u7684\u7535\u963b\u7387\u4e3a\uff1a\u03c1=0.0185\u6b27\u59c6\u5e73\u65b9\u6beb\u7c73\uff0f\u7c73
\u7535\u963bR=\u03c1l/S
l\u4e3a\u94dc\u7ebf\u957f\u5ea6\uff0c\u4ee5\u7c73\u4e3a\u5355\u4f4d\u3002S\u4e3a\u94dc\u7ebf\u622a\u9762\u79ef\uff0c\u4ee5\u5e73\u65b9\u6beb\u7c73\u4e3a\u5355\u4f4d\uff0c\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684\uff1f\uff1f\u5e73\u65b9\u7535\u7f06\u7684\u5e73\u65b9\u6570\u3002
\u8ba1\u7b97\u7ed3\u679c\u7684\u5355\u4f4d\u662f\u6b27\u59c6\u3002
\u9996\u5148\u77e5\u9053\u7535\u7f06\u4e0a\u7684\u7535\u6d41 I\uff08A)
\u4e09\u76f8\u7535\u8d1f\u8f7d \u22bfU(V)=I*\u03c1*L/S
(\u03c1\uff1a\u7535\u963b\u7387\u94dc\u662f0.0175\uff0c\u94dd\u662f0.0283\u3002L\u7535\u7f06\u957f\u5ea6\u7c73\uff0c\u7535\u7f06\u7ebf\u82af\u622a\u9762mm²\uff09
\u5355\u76f8\u7535\u8d1f\u8f7d \u22bfU(V)=2*I*\u03c1*L/S
(\u03c1\uff1a\u7535\u963b\u7387\u94dc\u662f0.0175\uff0c\u94dd\u662f0.0283\u3002L\u7535\u7f06\u957f\u5ea6\u7c73\uff0c\u7535\u7f06\u7ebf\u82af\u622a\u9762mm²\uff09
\u6269\u5c55\u8d44\u6599\uff1a
\u7535\u6d41\u6d41\u8fc7\u8d1f\u8f7d\u4ee5\u540e\u76f8\u5bf9\u4e8e\u540c\u4e00\u53c2\u8003\u70b9\u7684\u7535\u52bf\uff08\u7535\u4f4d\uff09\u53d8\u5316\u79f0\u4e3a\u7535\u538b\u964d\uff0c\u7b80\u79f0\u538b\u964d\u3002
\u7b80\u5355\u7684\u8bf4\uff0c\u8d1f\u8f7d\u4e24\u7aef\u7684\u7535\u52bf\u5dee\uff08\u7535\u4f4d\u5dee\uff09\u5c31\u53ef\u4ee5\u8ba4\u4e3a\u662f\u7535\u538b\u964d\u3002\u7535\u538b\u964d\u662f\u7535\u6d41\u6d41\u52a8\u7684\u63a8\u52a8\u529b\u3002\u5982\u679c\u6ca1\u6709\u7535\u538b\u964d\uff0c\u4e5f\u5c31\u4e0d\u5b58\u5728\u7535\u6d41\u7684\u6d41\u52a8\u3002
\u4f8b\u5982\uff0cA\u70b9\u7684\u7535\u52bf\uff08\u540c0\u7535\u4f4d\u7684\u7535\u52bf\u5dee\uff09\u662f2V\uff0cB\u70b9\u7684\u7535\u52bf\u662f8V\uff0c\u90a3\u4e48\uff0cA\u5bf9B\u70b9\u6765\u8bf4\uff0c\u538b\u964d\u5c31\u662f-6V\uff0c\u6216\u8005\u7ad9\u5728B\u70b9\u8bf4A\u70b9\u538b\u964d\u5c31\u662f6V\u3002
\u7535\u538b\u53ef\u5206\u4e3a\u9ad8\u7535\u538b\uff0c\u4f4e\u7535\u538b\u548c\u5b89\u5168\u7535\u538b\u3002
\u9ad8\u4f4e\u538b\u7684\u533a\u522b\u662f\uff1a\u4ee5\u7535\u6c14\u8bbe\u5907\u7684\u5bf9\u5730\u7684\u7535\u538b\u503c\u4e3a\u4f9d\u636e\u7684\u3002\u5bf9\u5730\u7535\u538b\u9ad8\u4e8e\u6216\u7b49\u4e8e1000\u4f0f\u7684\u4e3a\u9ad8\u538b\u3002\u5bf9\u5730\u7535\u538b\u5c0f\u4e8e1000\u4f0f\u7684\u4e3a\u4f4e\u538b\u3002
\u5176\u4e2d\u5b89\u5168\u7535\u538b\u6307\u4eba\u4f53\u8f83\u957f\u65f6\u95f4\u63a5\u89e6\u800c\u4e0d\u81f4\u53d1\u751f\u89e6\u7535\u5371\u9669\u7684\u7535\u538b\u3002 \u6309\u7167\u56fd\u5bb6\u6807\u51c6\u300aGB3805-83\u300b\u5b89\u5168\u7535\u538b\u89c4\u5b9a\u4e86\u4e3a\u9632\u6b62\u89e6\u7535\u4e8b\u6545\u800c\u91c7\u7528\u7684\uff0c\u7531\u7279\u5b9a\u7535\u6e90\u4f9b\u7535\u7684\u7684\u7535\u538b\u7cfb\u5217\u3002\u6211\u56fd\u5bf9\u5de5\u9891\u5b89\u5168\u7535\u538b\u89c4\u5b9a\u4e86\u4ee5\u4e0b\u4e94\u4e2a\u7b49\u7ea7\uff0c\u537342V\uff0c36V\uff0c24V\uff0c12V\u4ee5\u53ca6V\u3002
\u53c2\u8003\u8d44\u6599\uff1a\u767e\u5ea6\u767e\u79d1-\u538b\u964d
Iz 是电流单位 安 L 线路长度（单线） 单位 百米 S 导线面积，单位 平方毫米。
绛旓細濡備笅锛1銆璁＄畻鐢电嚎鐢甸樆锛孯=0.0175锛閾滅嚎锛*L*1.7/S锛屾垨鑰咃紝R=0.0283锛堥摑绾匡級*L*1.7/S銆2銆佺數绾鐢靛帇闄=I*R=锛堢敤鐢靛姛鐜/380/1.732/鍔熺巼鍥犳暟锛*R銆3銆佺嚎鎹=I*鐢电嚎鐢靛帇闄*1.732*鍔熺巼鍥犳暟銆備粙缁 浣庡帇绾胯矾鍙互浠庡叕鐢ㄤ綆鍘嬮厤鐢电綉鎺ュ叆锛岄氳繃浣庡帇閰嶇數瀹ゅ紩鍑;涔熷彲浠ョ敱鐢ㄦ埛鑷鐨勫彉閰嶇數瀹ょ殑浣庡帇...
绛旓細鈥滆繖2鏉″乏鍙25骞虫柟鐨閾滆姱绾瀹為檯鏈澶у姛鐜囦负绾33KW锛岀浉鎬荤數娴佺害50瀹夊煿銆傗濅篃灏辨槸璇翠竴杈圭殑骞茬嚎绾跨數娴両涓25A 涓杈圭殑渚涚數璺濈涓1300绫 1鍏堢畻鍗曟牴鐩哥嚎鐨勭嚎闃籖0 R0=0.017*1300/25惟=0.884惟 2鍐嶇畻鍗曟牴鐩哥嚎涓婄殑鍘嬮檷螖U 螖U=I*R0=25A*0.884惟=22.1V 鏁呰鐩哥嚎缁堢鐨勫鍦扮數鍘嬩负220V-22.1V=...
绛旓細浣庡帇绾胯矾閫犳垚鍘嬮檷鐨勫師鍥犳槸鐢电嚎璺繃闀裤佺嚎鎴潰鍋忓皬鍜岃礋杞界數娴佸亸澶ч犳垚鐨勩璁＄畻鍏紡锛1銆嬭绠楁瘡鏍圭數绾跨殑绾块樆鍊(閾滅嚎鐨勭數闃荤巼蟻锛0.0172锛岄摑绾肯侊紳0.0283)锛歊锛澫伱桳/S (L锛濈背锛孲锛漨銕)2銆嬬嚎璺帇闄嶇殑璁＄畻(鏋勬垚鍥炶矾涓2鏍圭嚎)锛歎锛2RI
绛旓細鍋囪浣跨敤鐨勭數绾夸负閾滅嚎锛屽畠鐨勭數闃荤巼澶х害涓0.00000172娆у路绫炽傚皢杩欎簺鍊间唬鍏ュ叕寮忥紝鎴戜滑鍙互璁＄畻鐢甸樆锛氱數闃伙紙R锛= 0.00000172娆у路绫 脳 2.5绫 / (2 * 0.5 脳 10^-6 骞虫柟绫) = 0.0216娆у 鏈鍚庯紝灏嗙數娴佸拰鐢甸樆浠ｅ叆鍘嬮檷鍏紡锛屾垜浠彲浠璁＄畻鍘嬮檷锛氬帇闄嶏紙V锛= 2.5瀹夊煿 脳 0.0216娆у = 0....
绛旓細鍏跺疄涓婇潰鐨勯棶棰樻槸涓や釜闂锛屾垜鍒嗗埆鏉ュ洖绛旓細1锛2.5骞虫柟閾滆姱绾220浼忕數鍘嬫媺2000绫冲悗鐢靛帇闄鏄灏戯紝绛旀鏄釜鍙橀噺锛屽氨鏄浣犺礋杞借秺澶э紝鐢垫祦瓒婂ぇ锛鍘嬮檷=鐢垫祦*鐢甸樆銆備笂闈璁＄畻浜嗙數闃诲紡鍥哄畾鐨勶紝鍘嬮檷灏遍殢璐熻浇鍙樺寲鑰屽彉鍖栵紱2锛岃兘甯﹀姩澶氬ぇ鍔熺巼鐨勭數鍣紵杩欐槸涓ソ闂銆傚洖绛斿畠灏卞繀椤诲厛寮曠敤鍥藉鐢靛姏瑙勮寖閲屽叧浜庝綆鍘嬬嚎璺...
绛旓細851脳10^-8 惟路m,瀵肩嚎鐨勭數闃璁＄畻鍏紡鏄疪=蟻L/s锛屽叾涓細R鈥旂數闃伙紝蟻鈥旂數闃荤巼锛孡鈥旈暱搴︼紝s鈥旀í琛楅潰绉 銆備綘璇寸殑185鏂瑰簲璇ユ槸185mm2锛堝钩鏂规绫筹級1骞虫柟姣背=10^-6骞虫柟绫筹紝100绫閾滅嚎涓婄殑鐢靛帇闄锛歎=IR=I蟻L/s=370脳1.851脳10^-8脳100/185脳10^-6=3.702浼忋
绛旓細鍘嬮檷澶氬皯鐪嬬數娴侊紝鐢垫祦瓒婂ぇ鍘嬮檷瓒婂ぇ銆7.4娆/鍗冪背锛岄偅300绫冲氨鏈2.22娆с傛牴鎹濮嗗畾寰嬶細U=I*R锛屽鏋滀綘鐨勮礋杞芥湁10A鐢垫祦锛岄偅鍘嬮檷灏辨湁22.2浼忋傚惎鍔ㄧ數鏈鸿偗瀹氬氨姣旇緝鍥伴毦浜嗐傚鏋滄槸鐓ф槑鍒拌繕鍑戞椿鐢ㄣ
绛旓細380v 鐢靛帇鍏佽卤7% 锛220v 鐢靛帇鍏佽+7% 锛-10% 銆傞氳繃璁＄畻杩滅鐢靛帇闄绗﹀悎鏍囧噯鐨勭數娴佸煎涓嬶細10骞虫柟閾滅嚎2000绫崇殑鐢甸樆锛歊=1.750惟/km脳2km=3.5惟 220v鐢靛帇鍏佽鐢靛帇闄嶆槸-10%锛歶=220v脳10%=22v 2000绫抽摐绾垮厑璁哥數娴侊細I=u梅R=22v梅3.5惟鈮6.3a 380v鐢靛帇鍏佽鐢靛帇闄嶆槸-7%锛歶=380v脳7%=26....
绛旓細绾胯矾鐢靛帇闄嶈绠鍏紡涓 鈻砋=锛圥*L锛/(A*S)鍏朵腑锛 P涓虹嚎璺礋鑽 L涓虹嚎璺暱搴 A涓哄浣撴潗璐ㄧ郴鏁帮紙閾滃ぇ姒備负77锛岄摑澶ф涓46锛塖涓虹數缂嗘埅闈 鍦ㄦ俯搴=20掳C鏃讹紝閾滅殑鐢甸樆绯绘暟涓0.0175娆у*骞虫柟姣背/绫 锛 鍦ㄦ俯搴=75掳C鏃 閾滅殑鐢甸樆绯绘暟涓0.0217娆у*骞虫柟姣背/绫 涓鑸儏鍐典笅鐢甸樆绯绘暟闅忔俯搴﹀彉鍖栬屽彉鍖,...
绛旓細12V鐢垫簮锛11W璁惧锛岀數娴佹帴杩1A锛1.0鐨閾滅嚎姣弅m鐢甸樆鏄16.3ohm宸﹀彸銆備綘鐨勫绾跨浉褰撲簬100m锛岀數闃绘槸1.6娆у锛岀數鍘嬩細涓嬮檷1.6脳1锛1.6V锛岃澶囦袱绔殑鐢靛帇瓒婁负10.4V锛岃澶囨槸鍚﹁兘杩愯浆瑕佺湅璁惧瀵圭數婧愮殑瑕佹眰浜嗐
