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漏电保护器和断路器有什么区别?是否两个都需要安装?有谁清楚?_其他_设计456问答
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漏电保护器和断路器有什么区别?是否两个都需要安装?有谁清楚?

浏览:31次 | 提问时间: 07-27 09:20
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4个答案
看见你笑时连眉眼都在发光 07-27 09:21

漏电保护器是漏电保护用的,人触摸到带电体会跳闸,确保人身安全,是漏电保护器的主要功能;家电假如绝缘不好漏电到外壳上,漏电保护器也会跳闸,防止人体触摸触电。漏电保护器对电流有通断作用,可以切断负荷电流,不能切断短路电流,没有过负荷保护和短路保护功能。空气开关对电流有通断作用,可以切断负荷电流、过负荷电流、短路电流,主要用作过负荷保护和短路保护。漏电断路器(漏电空气开关)把漏电保护器和空气开关的功能集中在一起,同时具备电流通断功能、漏电保护功能、过负荷保护和短路保护功能。空气开关通常用于工业,漏电保护器/断路器常用与民用及家庭用电。

泪美人不明失落 07-27 09:29

漏电保护器用作漏电保护,低压断路器用作短路保护,电热水器主要担心是漏电,假如你想加短路保护,直接在漏电保护器下面串接低压断路器就行,以及你可以不用买插座和插头直接接在低压断路器的出线端,要断电直接把低压断路器分闸就行。

阳光下你の我 07-27 09:37

发热的情况,关键是使用电器插头或者线路是否接触良好,没有接触好,就会发热,引发电流偏大,引发漏电开关发热,应检查使用电器的连接情况;也可以检查接线点是否松动。引发漏电断路器(漏电总保护)误动、拒动或不动作的原因:漏电保护器在人身安全、设备保护和防止电气火灾等方面起着重要的作用。但由于不能正确安装和使用,引发漏电保护器不能正常运行、发生误动或拒动。所谓误动,就是在线路没有发生漏电故障时,漏电保护器动作的现象。反之,在线路发生漏电故障时,漏电保护器应动作却不动作的现象,叫拒动。
(1)漏电断路器在安装使用过程中若遭受剧烈碰撞或震动,会造成整体结构松动、操作机构失灵,引发误动作。
(2)漏电断路器负载侧的中性线(零线)重复接地,会使正常工作电流经接地点分入地,引发漏电断路器误动作;另外,在某些条件下,假如用电设备发生漏电故障,漏电电流的一部分经接地点分流,其综合结果使漏电电流的差值变小,假如此值小于漏电断路器的额定漏电动作电流,则会引发漏电断路器拒动。
(3)将三级漏电断路器,误用于三相四线供电网络中,由于中性线(零线)中的正常工作电流不流经零序电流互感器,当启动单相负载时,漏电断路器就会动作。
(4)当人体同时触及负载侧的两条线时,人体实际上成为了电源的负载,因此漏电断路器不会提供安全保护。
(5)当人体同时触及负载侧带电的某一相线或中性线、断线的两端时,人体实际上成为一个串接在该回路中的电阻,因此漏电断路器不会提供安全保护。
(6)过电压引发。如当线路中发生操作过电压时可使得断路器动作,这时可以选用延时或冲击电压不动作型漏电断路器,也可以在触头之间安装阻容吸收电路抑制过电压,也可在线路中投人过电压吸收装置。
(7)电磁干扰。如附近有磁性设备或大功率电气设备开停,应调整漏电断路器的安装位置,远离这样的电气元件。
(8)环流影响。假如两台变压器并联运行,都有各自的接地,因两台变压器的阻抗不可能完全相等,这样会在接地线中产生环流,引发断路器动作,拆除一个接地线即可。另外,同一变压器通过两条并联回路对同一负载供电,两条回路中的电流也不可能完全相同,也可能出现环流,,应将两条回路分开运行。
(9)工作零线的绝缘电阻降低。当工作零线的绝缘电阻降低时,假如三相负荷不平衡,在零线上会出现比较大的工作电流,并经人地流向其他分支路,从而在各个漏电断路器上都能出现漏电电流,使断路器误动作。
(10)接地不当。如零线重复接地,会引发漏电断路器的误动作。
(11)过载或短路的影响。假如漏电断路器同时又具有短路保护、过电流保护时,当过流保护脱扣器的整定电流大小不合适时会发生误动作,此时调节整定电流值即可。

剥夺你的资格 07-27 09:46

接地线的作用是,电器金属外壳一旦漏电,电量会随着地线形成回路,一方面降低外壳电压,使之达到安全电压范围,另一方面形成短路,使断路器自动断电而达到保护目的。假如没有接地线,可使用漏电断路器保护,原理是火线和零线在正常使用时是平衡回路,当有漏电时有会破坏平衡,当达到设定的安全值时,保护器自动断断电。,你可安装漏电保护器解决问题。

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