火线,零线,地线各自颜色和作用

火线,零线,地线各自颜色和作用 火线，零线，地线各自颜色和作用(2007-10-19 09:48:59) 科学 分类:IT? 火线又称相线，它与零线共同组成供电回路。在低压电网中用三相四线制输送电力，其中有三根相线一根零线。为了保证用电安全，在用户使用区改为用三相五线制供电，这第五根线就是地线，它的一端是在用户区附近用金属导体深埋于地下，另一端与各用户的地线接点相连，起接地保护的作用。 火线是带电的,地线和零线是不带的,家用两插孔的插座里有一根火线,一根零线,用电笔能测出带电来的是火线,不带电的是零线,三插孔的插座里才有地线,地线要连接在用电器的外壳上,以防止电器漏电使人触电伤亡。 另外，家用插座里各孔的接线位置是有规定的，如果拆开插座可以看到，标有L标记的点是接火线的，N标记的是接零线的，地线有个专门的接地符号。不懂的人千万还要乱接(特别是地线的位置)，否则可能造成严重后果。 speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 地线是作为电路电位基准点的等电位体。这个定义是不符合实际情况的。实际地线上的电位并不是恒定的。如果用仪测量一下地线上各点之间的电位，会发现地线上各点的电位可能相差很大。正是这些电位差才造成了电路工作的异常。电路是一个等电位体的定义仅是人们对地线电位的期望。HENRY 给地线了一个更加符合实际的定义，他将地线定义为:信号流回源的低阻抗路径。这个定义中突出了地线中电流的流动。按照这个定义，很容易理解地线中电位差的产生原因。因为地线的阻抗总不会是零，当一个电流通过有限阻抗时，就会产生电压降。因此，我们应该将地线上的电位想象成象大海中的波浪一样，此起彼伏。 照明电路里的两根电线，一根叫火线，另一根则叫零线。火线和零线的区别在于它们对地的电压不同:火线的对地电压等于220V;零线的对地的电压等于零(它本身跟大地相连接在一起的)。所以当人的一部分碰上了火线，另一部分站在地上，人的这两个部分这间的电压等于220V，就有触电的危险了。反之人即使用手去抓零线，如果人是站在地上的话，由于零线的对地的电压等于零，所以人的身体各部分之间的电压等于零，人就没有触电的危险。 如果火线和零线一旦碰起来，由于两者之间的电压等于220伏，而两接触点间的电阻几乎等于零，这时的电流非常大，在火线和零线的接触点处将产生巨大的热量，从而发出电火花，火花处的温度高到足以把金属导线烧得熔化。 speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 地是电器设备安全技术中最重要的工作，应该认真对待。那种不加考虑随意接地的做法常常会给计算机设备造成不良的后果，严重时会烧毁整个设备应用系统，甚至造成人身伤害。正确接地可提高整个系统的抗干扰能力。 要正确使用计算机的电源线。目前，我们使用的电源插座大多是单相三线插座或单相二线插座。单相三线插座中，中间为接地线，也作定位用，另外两端分别接火线和零线，接线顺序是左零右火，即左边为零线，右边为火线.凡外壳是金属的家用电器都采用的是单相三线制电源插头。三个插头呈正三解形排列，其中上面最长最粗的铜制插头就是地线。地线下面两个分别是火线(标志字母为"L"Live Wire)线(标志字母为"N"Naught wire)，顺序是左零右火，(插头背面对着自己本人时)。 使用中千万不要将零线端和定位用的地线端连在一起，因为有的设备采用二线插头如果设备的电源火线、零线接反或使用中插错位置，必将造成火线、零线短路，烧坏设备，造成不右弥补的损失。因此，即使家里或单位的三线插座中没有接地，也最好使用三线电源插头和三线插座 回答者:孤北一狼 - 见习魔法师 三级 12-22 21:36 火线是指三相四线电网A B C中的任意一相,零线是指三相四线对地无电压有电流的那一根电线,地线就是接地保护线 speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 在新老叫法中,零线 地线是比较混乱的,现在正确的叫法应该是相线(火线),中性线(零线),接地保护线(地线) -------------------- 为了使交流电有很方便的动力转换功能，通常电力传输是以三相四线的方式，三相电的三根头称为相线，三相电的三根尾连接在一起称中性线也叫"零线"。叫零线的原因是三相平衡时刻中性线中没有电流通过了，再就是它直接或间接的接到大地，跟大地电压也接近零。 地线是把设备或用电器的外壳可靠的连接大地的线路，是防止触电事故的良好。 一般情况下，三相电路中火线使用红、黄、蓝三种颜色表示三根火线，零线使用黑色。单相照明电路中，一般黄色表示火线、蓝色是零线、黄绿相间的是地线。也有些地方使用红色表示火线、黑色表示零线、黄绿相间的是地线。 ---------------- 大地是良好的导体，地线通过深埋的电极与大地短路连接。市电的传输是以三相的方式，并有一根中性线，三相平衡时中性线的电流为零，俗称"零线"，零线的另一个特点是与地线在系统总配电输入短接，电压差接speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 近为零。三相电的三根相线与零线有220电压，会对人产生电击，俗称"火线"。 火线，红色 地线，黑色 零线，蓝色或其他色 ---------------- 一般来说，处了接地线是黄绿相间的外，其它相线和零线是没有分的，但人们习惯把热色的线当作火线(相线)，冷色的线当作零线。 零线是经市网电路后在电网系统里接到底层里的，它在家庭用电中必须存在的线路;接地线是各用户单元自己连接到底层里的，作安全用电作用设置的，无需连到电网上的。当有用电器是金属外壳，或虽要接地屏蔽的设施，它的插头会有第三只接地极，最终与插座的接地连接接地，起到安全用电。 为了使交流电有很方便的动力转换功能，通常电力传输是以三相四线的方式，三相电的三根头称为相线，三相电的三根相线与零线有220电压，会对人产生电击，俗称"火线"。 三相电的三根尾连接在一起称中性线也叫"零线"。叫零线的原因是三相平衡时刻中性线中没有电流通过了，speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 再就是它直接或间接的接到大地，跟大地电压也接近零。 地线是把设备或用电器的外壳可靠的连接大地的线路，是防止触电事故的良好方案。 一般情况下，三相电路中火线使用红、黄、蓝三种颜色表示三根火线，零线使用黑色。 单相照明电路中，一般近暖色调表示火线、近冷色调是零线。 例如使用红色表示火线、黑色表示零线，黄色表示火线、蓝色是零线 黄绿相间的是地线。 ----------- 电力系统和电气设备接地装置按其作用可分为:1.工作接地 在正常或事故情况下，为了保证电气设备可靠地运行，必须将电力系统中某一点接地时，称为工作接地。如变压器低压侧的中性点接地，就属于工作接地。 2.保护接地 为了防止电气设备的绝缘损坏，而发生人身触电危险，常将与电气设备带电部分相绝缘的金属外壳或构架与大地作电气上的连接，称为保护接地。 3.重复接地 将零线上的一点或多点与另外的接地装置连接，称为重复接地。当零线有电时，重复接地可降低speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 零线对地电压;当零线断线时，重复接地可使故障的危害程度减轻。 4.保护接零 在变压器中性点直接接地的三相四线制供电系统中，将电气设备的金属外壳等直接与零线连接，称为保护接零。 红黄蓝色表示火线，黑色表示地线，黄绿相间表示零线。 L.N.E是(火)、(零)、(地) 插头上的L、N、E分别表示火、零、地;线色可能会有所区别，一般黄绿线[半黄半绿]为地，如果黄绿线，黑色的应该为地线;红色或褐色为火线;黄色或蓝色为零线。 ---------- 火线 零线 地线 插错了会怎样～ speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 几种可能:1、如果是零线跟火线接错了:没危险;2、接地跟零线接错了:问题也不是很大，只不过会使接地当零线用，造成接地带电;3、零线跟火线接错了:会使机壳带电，如果前路装有合适的断路器，会造成断路器器跳闸，如果没有的话就比较危险了，可能会使人触电。注意安全吧。 --------------- 一般情况下红色是火线，蓝色是零线，黑色是地线.、 火线和零线区别 火线和零线都是带电的线,如果二相电源接了用电器的话,那么就有电流从电线中流过 一般的感觉火线带了电,是因为如果人接触(包括一些间接接触)了火线,一部分的电流就从人的身体中经过了，就好比本来一个水管子,从中间有分了一个水龙头了。 零线不带电是因为电源的另一端(零线)接了地,我们在地上接触零线的时候，因为没有位差,就不会形成电流。所以就有零线不带电的感觉。零线和火线本来都是由电源出来的,电流的正方向就是由一出,经过外部设备,从另一端进.形成 一个回路。零线和火线的区别就是电源的两个端子其中的一个接了大地 speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the 零线和地线区别 1.零线和地线这两个是不同的概念，不是一回事。 2.地线的对地电位为零。使用的电器的最近点接地。 3.零线的对地电位不一定为零。零线的最近接地点是在变电所或者供电的变压器处。 4.零线有时候会电人，在什么时候呢,当你的电炉子不发热了，千万不要以为没电了，不会电人，错啦～有可能存在这样的可能，离你的电器很沅的地方N线断开了，用电压表一量会发现，电器的LN线都是市电的电压～ 5.地线不会电人，除非很糟的情况，者不懂，或者胡乱搞的产品～ 6.在你的电路中有零线和地线的话，你会发现有一个高耐压电容在他们中间。 speed up technology results into, active guide enterprise will mature technology results into for productivity, and Translate into economic benefits, efforts to solve economic and technological "two peels" phenomenon, says from the Dongping real, is to provide research institutions with more into place. Strengthening the agricultural scientific and technological achievements in the field to improve efforts to help farmers, crop planting, processing, animal husbandry and other agricultural products, increase the intensity of transforming scientific and technological innovation, science and technology to improve agricultural efficiency, improve the mass income and services immigrants safe haven siege works. Wuhan Institute of freshwater should give full play to the Chinese Academy of Sciences, and improving the added value of Dongping Lake aquatic products. 1th, in the middle of this yearProposed to increase the level of modernization in agriculture, hoping the county levels to seriously study the documents. 18 plenary session "storing food in, storing food in land", this requirement is very high, population, food is not enough, and not completely rely on imports, has to rely on technology to increase food production and limited land mass, relevant departments at the county level in particular, agricultural sector, active docking tertiary institutions, the Institute took the lead in the