Circuit breaker is a kind of mechanical switching apparatus which can connect, carry and break the current under normal circuit conditions, and can also connect, carry and break the current for a certain time under specified abnormal circuit conditions. So, how to install the MCB?

1）断路器的安装应符合GB13955-92标准及产品说明书的要求。

1) The installation of circuit breaker shall meet the requirements of GB 13955-92 standard and product manual.

2）断路器的安装应充分考虑供电线路、供电方式、供电电压及系统接地型式。

2) The installation of circuit breaker shall fully consider the power supply line, power supply mode, power supply voltage and system grounding type.

3）断路器的额定电压、额定电流、短路分断能力、分断时间应满足被保护供电线路和电气设备的要求。

3) The rated voltage, rated current, short-circuit breaking capacity and breaking time of the circuit breaker shall meet the requirements of the protected power supply line and electrical equipment.

4）断路器的安装接线应正确，在不同的系统接地形式的单相、三相三线、三相四线供电系统中剩余电流保护器的接线不同，应给以充分注意。

4) The installation and wiring of the circuit breaker should be correct. In the single-phase, three-phase three wire, three-phase four wire power supply systems with different system grounding forms, the wiring of the residual current protector is different, which should be given full attention.

以上就是微型断路器设计要点有哪些以及微型断路器如何施工安装的全部内容了，小型断路器是指安装在终端配电线路的保护电器，主要用于线路和电器设备的过载和短路保护。在国民生产生活用电需求不断加大，社会对供电安 全性、可靠性提出较高要求的情况下，需要优化配网运行效果。

The above is the design points of miniature circuit breaker and the construction and installation of miniature circuit breaker. Miniature circuit breaker refers to the protective electrical equipment installed in the terminal distribution line, which is mainly used for overload and short circuit protection of lines and electrical equipment. With the increasing demand for electricity for national production and living, the society puts forward higher requirements for the safety and reliability of power supply, so it is necessary to optimize the operation effect of distribution network.