常见的有低压断路器和真空断：低压断路器是用于交流电压1200V，直流电压1500V的电路中起通断、控制或保护等作用的电器。低压断路器是电器工业的重要组成部分，在机械行业中是基础配套件，在配电系统中低压成套开关设备主要由各种低压断路器元件构成，低压断路器的功能及性能对低压成套开关设备起着至关重要的作用。
Common are low-voltage circuit breaker and vacuum break: low-voltage circuit breaker is used in the circuit with AC voltage of 1200V and DC voltage of 1500V for on-off, control or protection. The low-voltage circuit breaker is an important part of the electrical industry. It is a basic component in the mechanical industry. In the distribution system, the low-voltage switchgear is mainly composed of various low-voltage circuit breaker components. The function and performance of the low-voltage circuit breaker play a crucial role in the low-voltage switchgear.
发电设备所发出电能的80%以上是通过低压断路器分配使用的。每增加1万kW发电设备，约需2万件左右的各类低压断路器与之配套。在工业自动化系统中，也需要由低压断路器构成的各种控制屏、控制台、控制器等产品。
More than 80% of the power generated by power generation equipment is distributed and used through low-voltage circuit breakers. For every 10000 kW power generation equipment added, about 20000 pieces of various low-voltage circuit breakers are needed. In the industrial automation system, it also needs various control panels, consoles, controllers and other products composed of low-voltage circuit breakers.