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小型断路器内部结构及功能说明

来源:http://www.jntongyu.com/ 日期:2021-09-09 发布人:tongjid

1、内部结构
1. Internal structure
将4个铆钉破损,可将其拆为两半,如下图。零件嵌在左盖,可拆开右盖。
If four rivets are damaged, they can be disassembled into two parts, as shown in the figure below. The parts are embedded in the left cover, and the right cover can be disassembled.
2、电路部分
2. Circuit part
触点闭合时,电路路径为(设方向从上到下):1-2-3-5-6-7-8-9-11。触点断开时,触点间产生电弧电流,起始时电流路径为:1-2-3–电弧-5-6-7-8-9-11。电弧因磁、热等作用引入灭弧室E后,电流路径为:1-2-4-E-F-10-11,电弧在灭弧室内被分割为10段,很快冷却、熄灭。电弧熄灭后,电流彻 底中断。
When the contact is closed, the circuit path is (set the direction from top to bottom): 1-2-3-5-6-7-8-9-11. When the contact is disconnected, arc current is generated between the contacts. At the beginning, the current path is: 1-2-3 – arc-5-6-7-8-9-11. After the arc is introduced into the arc extinguishing chamber e due to magnetic and thermal effects, the current path is: 1-2-4-e-f-10-11. The arc is divided into 10 sections in the arc extinguishing chamber, which will be cooled and extinguished soon. After the arc is extinguished, the current is completely interrupted.
3、机械部分
3. Mechanical part
机械部分的功能:支持手工“合通“、”分断”两种操作,遇过流、短路时自动执行“热脱扣”和“电磁脱扣”进行保护。另具备“热脱扣电流微调”操作(这个功能不常用)。
Function of mechanical part: it supports manual "on" and "off" operations. In case of overcurrent and short circuit, it will automatically execute "thermal trip" and "electromagnetic trip" for protection. In addition, it has the operation of "thermal tripping current fine adjustment" (this function is not commonly used).
4、外壳
4. Shell
外壳尺寸是符合工业标准的。为了统一标准、提高加工效益,小于某额定电流的断路器会使用同一种外壳、触头及接线端子。这种外壳可通过的大额定电流就是“壳架等级电流”。本例中,型号DZ47LED63中的63就是表示该系列的壳架等级电流为63A。
The shell size is in line with industry standards. In order to unify standards and improve processing efficiency, circuit breakers with less than a certain rated current will use the same shell, contact and wiring terminal. The large rated current that this enclosure can pass through is the "rack level current". In this example, 63 in the model dz47led63 means that the shell level current of this series is 63A.
外壳拆为左右二半后,可见二半多数地方是对称的。根据功能,可把内部空间大致划分为“四居室”。
After the shell is disassembled into the left and right halves, it can be seen that most of the halves are symmetrical. According to the function, the internal space can be roughly divided into "four bedrooms".


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