ruo shi dian ya zai 2 2 0fu shi ,na me dian liu ye jiu shi zai 5 4 . 5 A ,yong 6 ping fang huo zhe 1 0ping fang de tong xian ,jiu ke yi le ,ruo shi chuan guan jiu yao yong 1 0ping fang de tong xian 。ruo shi dian ya shi san xiang 3 8 0fu de ,na me fu zai dian " 我们可得出I=12千瓦/220伏=54.5安,然后查看各种导线的安全载流量是多少,不过使用10平方电线也是可以的。具体应该使用几平方的电线,建议大家最好
220kW的功率需要3芯50平方毫米的铜电缆,度为100米,这是基于一个电流负载率为100%的情况下计算的。但是,如果电压更高,电缆的截面积可以更小。21000W/220V=95.45A 再按一下方法粗略计算: 铜线每平方毫米6安培.铝线是每平方毫米5安培(仅供快速估算) 4平方的铜线:4*6=24A 6平方的铜线:6*6=36A 10平方的铜线:10*6=60A 16平方的铜线:16*6=96
2 1 000W / 2 2 0V = 9 5 . 4 5 A zai an yi xia fang fa cu lve ji suan : tong xian mei ping fang hao mi 6 an pei . lv xian shi mei ping fang hao mi 5 an pei ( jin gong kuai su gu suan ) 4 ping fang de tong xian : 4 * 6 = 2 4 A 6 ping fang de tong xian : 6 * 6 = 3 6 A 1 0ping fang de tong xian : 1 0* 6 = 6 0A 1 6 ping fang de tong xian : 1 6 * 6 = 9 6 " 2 2 0k W de gong lv xu yao 3 xin 5 0ping fang hao mi de tong dian lan ,chang du wei 1 00mi ,zhe shi ji yu yi ge dian liu fu zai lv wei 1 00% de qing kuang xia ji suan de 。dan shi ,ru guo dian ya geng gao ,dian lan de jie mian ji ke yi geng xiao 。"
wo men ke de chu I = 1 2 qian wa / 2 2 0fu = 5 4 . 5 an ,ran hou zha kan ge zhong dao xian de an quan zai liu liang shi duo shao ," bu guo shi yong 1 0ping fang dian xian ye shi ke yi de 。ju ti ying gai shi yong ji ping fang de dian xian ,jian yi da jia zui hao " 21KW一般使用三相电;根据三相电相线电流计算公式I=P÷(U*1.732*cosΦ);式中,P为功率(W);U为电压(380V)。21KW一般使用三相电,根据三相电相线电流计算公式I=P÷(U*1.732*cosΦ),带入数据P=21kw,U=380V,计算得,相线电流I=37.5A,所以要用10平方的铜线。
2 1 K W yi ban shi yong san xiang dian ; gen ju san xiang dian xiang xian dian liu ji suan gong shi I = P ÷ ( U * 1 . 7 3 2 * c o s Φ ) ; shi zhong , P wei gong lv ( W ) ; U wei dian ya ( 3 8 0V ) 。2 1 K W yi ban shi yong san xiang dian , gen ju san xiang dian xiang xian dian liu ji suan gong shi I = P ÷ ( U * 1 . 7 3 2 * c o s Φ ) , dai ru shu ju P = 2 1 k w , U = 3 8 0V , ji suan de , xiang xian dian liu I = 3 7 . 5 A , suo yi yao yong 1 0ping fang de tong xian 。若是电压在220伏时,那么电流也就是在54.5A,用6平方或者10平方的铜线,就可以了,若是穿管就要用10平方的铜线。若是电压是三相380伏的,那么负载电