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              來源:http://www.cekidots.com/ 日期:2021-09-09 發布人:tongjid

              1. Internal structure
              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. Circuit part
              觸點閉合時,電路路徑為(設方向從上到下):1-2-3-5-6-7-8-9-11。觸點斷開時,觸點間產生電弧電流,起始時電流路徑為:1-2-3–電弧-5-6-7-8-9-11。電弧因磁、熱等作用引入滅弧室E后,電流路徑為:1-2-4-E-F-10-11,電弧在滅弧室內被分割為10段,很快冷卻、熄滅。電弧熄滅后,電流徹 底中斷。
              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. Mechanical part
              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. Shell
              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.
              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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