380电源三相负载30个千瓦距离500米用五零电缆算它的压降是多少？ 400米50平方的三芯电缆，电压380，电流150A，压降有...
315\u53d8\u538b\u5668\u7528300\u7c73150\u5e73\u65b9\u94dc\u82af\u7535\u7f06\u5e2690\u5343\u74e6\u7684\u7a7a\u538b\u673a,\u4e3a\u4ec0\u4e48\u542f\u52a8\u4e0d\u8d77\u6765\uff0c\u538b\u964d\u5230320V\u5df2\u77e5L=300m\uff0c\u8ddd\u79bb\u5927\u957f\u4e86\uff0cP=90kw\uff0c\u989d\u5b9a\u7535\u6d41\u7ea6167A\uff0c\u5047\u5b9a\u542f\u52a8\u7535\u6d41\u53d66\u500d\u7ea61002A
S=150mm2 R=0.0188*300/150=0.038\u6b27 U=0.038*1002=38v
\u5047\u5982\u7535\u6e90\u7535\u538b\u4e3a380v 380-38=342v\uff0c\u5e94\u8be5\u80fd\u6ee1\u8db3\u542f\u52a8\u8981\u6c42\u7684\u3002\u5b9e\u9645\u4e0a\u964d\u81f3320v\uff0c\u90a3\u4e48\u662f\u4e0d\u80fd\u987a\u5229\u542f\u52a8\u7684\u3002\u67e5\u539f\u56e0\uff1b1.\u7535\u6e90\u7535\u538b380v\uff1f\uff0c2.\u8ddd\u79bb\u4e0d\u6b62300m\uff1f\uff0c3.\u622a\u9762\u4e0d\u8db3150\uff1f\uff0c4.\u542f\u52a8\u65b9\u5f0f\uff0c5.\u662f\u5426\u5e26\u8d1f\u8377\u542f\u52a8\uff0c
\u89e3\u51b3\u529e\u6cd5\u53ef\u8bd5\uff1b1.\u63d0\u9ad8\u7535\u6e90\u7535\u538b\u81f3420v\uff0c2.\u7a7a\u8f7d\u51cf\u538b\u542f\u52a8\uff0c3.\u9009\u62e9\u7535\u5bb9\u968f\u673a\u8865\u507f\uff0c\u53ef\u89e3\u51b3\u95ee\u9898\u3002
400\u7c7350\u5e73\u65b9\u7684\u4e09\u82af\u94dc\u7535\u7f06\uff0c\u7535\u963b\u662f\uff1aR=0.018*400/50=0.144\u6b27
\u7535\u7f06\u7684\u53e6\u4e00\u7aef\u7535\u538b\u964d\uff1a\u25b3U=0.144*150=21.6V
\u4ece\u5206\u7535\u7bb1\u63a5380v\u7535\uff0c 400\u7c73\u7535\u7f06\u7684\u53e6\u4e00\u7aef\u7684\u5b9e\u9645\u7535\u538b\uff1aU\u5b9e=U-\u25b3U=380-21.6=358.4V
绛旓細绾胯矾鐢靛帇鎹熷け5.134锛咃紝鏈夌偣澶т簬瑙勮寖4锛呰姹傘傚彲浠ラ夌敤70骞虫柟鐢电紗鍏剁嚎璺數鍘嬫崯澶3.828锛呫
绛旓細宸茬煡璐熻浇棰濆畾鍔熺巼P=30kW锛岄瀹氱數鍘婾=380V锛岀數婧愮浉鏁3 浠よ礋杞藉姛鐜囧洜鏁癱os蠁=0.8 璐熻浇棰濆畾鐢垫祦I=P/鈭3Ucos蠁=30kW梅(1.732脳0.38kV脳0.8)鈮56.98A
绛旓細3鐩380v30kw鐢65A宸﹀彸鐨勭┖寮锛屽缓璁夋嫨63A鎴栬80A銆30KW锛屽亣璁涓夌浉鐢靛帇涓380V锛屽姛鐜囧洜鏁颁负0.9锛屽叾鐢垫祦绾︿负50.65A濡傛灉璐熻浇涓虹數鏈恒佺數纾侀榾銆佸彉鍘嬪櫒绛夋劅鎬ц礋杞斤紝鍒欓渶瑕佷负棰濆畾鐢垫祦鐨2-3鍊嶏紝鍗125A鎴160A銆傚鏋滆礋杞芥槸鐓ф槑銆佸彇鏆栬澶囩瓑闃绘ц礋杞斤紝鍒欓渶瑕佷负棰濆畾鐢垫祦鐨1.2-1.3鍊嶃30kW涓夌浉寮傛鐢靛姩鏈虹殑棰濆畾...
绛旓細涓鑸潵璇达紝30kw380v閰10骞虫柟鐢电紗銆涓夌浉380V30鍗冪摝鐢10骞虫柟鐨勯摐鑺嚎灏卞彲浠ヤ簡銆傚彲浠ラ夌敤10骞虫柟鎴栬呬互涓婄殑閾滆姱绾匡紝4脳16骞虫柟姣背鏍囧噯鍥涜姱鐢电紗锛屾垨鑰3脳16+1脳10瑙勬牸鐨勶紝濡傛灉浣跨敤鍗曡姱鐢电紗杩樻槸16骞虫柟姣背锛涗娇鐢380V鐢垫簮鐨30KW鐢ㄧ數闇瑕佷娇鐢16mm鐨勯摐鑺绾裤傜數缂嗙殑澶у皬鐢璐熻嵎鍔熺巼銆佸姛鐜囧洜绱犺绠楄浇娴侀噺锛屽苟鏍规嵁...
绛旓細瑙ｆ瀽锛30kW鍔熺巼锛屽湪380V鐢靛帇鐨涓夌浉鐢垫簮鏃讹紝鏍规嵁涓夌浉鐢靛姛鐜囧叕寮忥細P=鈭3*U*I*cos蠄锛屽叾涓璓涓哄姛鐜囷紝鈭3鈮1.732涓轰笁鐩哥數鍊嶇巼锛孶涓虹數鍘嬶紝I涓虹數娴侊紝cos蠁涓哄姛鐜囧洜鏁帮紙涓鑸彇0.8锛夛紝鍙緱 I=P/鈭3*U*cos蠄=30000/(1.732脳380脳0.8)鈮57A锛屽嵆30鍗冪摝璐熻浇鍦380V鐢垫簮鐨勫伐浣滅數娴佷负57A锛屽缓璁夐厤C60...
绛旓細濡傛灉鎰熷簲璐熻浇鍗犲ぇ澶氭暟锛屽鐢垫満绛夛紝鍙互鐢16骞虫柟姣背鐢电紗锛屽鏋滅數闃绘ц礋杞藉拰鎰熸ц礋杞芥贩鍚堬紝鍙互鐢25骞虫柟姣背鐢电紗銆
绛旓細涓夌浉380v鐢垫簮30鍗冪摝鐨勭數鍣ㄦ寜鎰熸璐熻浇绠楁湁57銆8涓數娴侊紱鎸夐樆鎬ц礋杞界畻鏈45.6A鐢垫祦锛涘崟鐩告寜 I锛漃锛廢 绠楀嚭鐢垫祦銆傛紡鐢靛紑鍏虫寜1.5鍊嶇數娴侀夌敤锛涢厤绾挎寜閾滅嚎3~5A/mm²锛岄摑绾挎寜1.8~2.5A/mm²閫夌敤锛
绛旓細濡傛灉鏄涓夌浉380浼鐢垫簮锛岀敱浜庢槸涓夋牴鐢电嚎鐢靛帇鍙堥珮鐢垫祦灏卞皬锛屽彲鎸夋瘡鍗冪摝1.5瀹夊煿锛堢収鏄庢垨鐢电儹璐熻浇锛夋垨2.5瀹夊煿锛堢數鍔ㄦ満绛夊姩鍔涜礋杞斤級閫夌敤鐢电嚎锛岀數鍣ㄧ殑鍔熺巼瓒婂ぇ锛岀數娴佷篃瓒婂ぇ銆傜數绾挎槸鏈夌數闃荤殑锛岀數绾胯繃闀夸細闄嶆帀涓閮ㄥ垎鐢靛帇锛岃繖瀵圭収鏄庤岃█锛屽彧鏄伅鏆椾竴鐐硅屽凡锛屼絾鏄鏋滆礋杞芥槸鐢靛姩鏈哄氨瑕佸皬蹇冧簡锛岀數绾胯繃闀胯繃缁嗗父甯...
绛旓細涓夊崄鍗冪摝鐨勫彂鐑鐢垫祦璁＄畻锛氱數鐑涓虹數闃绘璐熻浇锛屼娇鐢涓夌浉鐢垫簮鐨勯瀹氱數娴佷负锛氥愨厾锛 P 梅锛1.732 脳 U锛夈戯紱锛 30 KW 梅锛1.732 脳 380 V锛夛紳 45 A 銆傘愭瘡鐩哥數娴佸氨鏄 45 A 銆傘戞牴鎹數绾跨數娴佸鐓ц〃锛屽彲浠ラ夋嫨16骞虫柟鐨勯摐鑺數绾裤
绛旓細30鍗冪摝涓夌浉鐢甸渶瑕10骞虫柟鐨勭數绾裤備笁鐩哥數灏辨槸380V锛380V30鍗冪摝鐢靛櫒鐨勬渶澶х數娴佹槸79A锛10骞虫柟閾滅嚎鐢电紗瀹夊叏杞芥祦鏄75A宸﹀彸锛屾墍浠ョ敤10鍥芥爣骞虫柟閾滅嚎鐢电紗灏卞彲浠ャ傚鏋滀笉璁℃垚鏈渶濂界敤16骞虫柟閾滅嚎鐢电紗锛屽洜涓16骞虫柟閾滅嚎鐢电紗鍙互杞芥祦100A锛岀浉瀵规潵璇存洿瀹夊叏涓浜涖傚崈鐡︽槸鍔熺巼鍗曚綅锛岀瓑浜1000鐡︾壒銆傚崈鐡︽棭鏈熶富瑕佺敤浜庣數瀛︼紝鐜板湪...
