一、低压熔断器
1、 Low voltage fuse
低压熔断器是一种简单的电路保护电器，其原理是当流经熔断器的电流达到或超过定值一定时间后，本身的熔体熔化，切断电路。其动作原理简单，安装方便，一般不单独使用，主要用来配合其他电器使用。
Low voltage fuse is a simple circuit protection appliance. Its principle is that when the current flowing through the fuse reaches or exceeds the fixed value for a certain time, its own melt melts and cuts off the circuit. Its action principle is simple and easy to install. It is generally not used alone. It is mainly used to cooperate with other electrical appliances.
二、低压断路器
2、 Low voltage circuit breaker
低压断路器又称为自动开关，俗称空气开关。当进行自动控制或保护控制操作时，断路器可以在综保装置控制下进行电路的分断或接通操作。断路器不仅可以通断正常的负荷电流，而且能够承受一定时间的短路电流，并可以分断短路电流，切除故障线路和设备。
Low voltage circuit breaker is also called automatic switch, commonly known as air switch. When the automatic control or protection control operation is carried out, the circuit breaker can carry out the opening or connecting operation of the circuit under the control of the comprehensive protection device. The circuit breaker can not only make and break the normal load current, but also bear the short-circuit current for a certain time, and can break the short-circuit current and cut off the faulty lines and equipment.
三、二者的区别
3、 The difference between the two
断路器和熔断器二者间不存在明显的差异，其应用也没有太大的区别。都是以断路保护作用为主的设备。但熔断器在使用的时候属于一次性设备，在使用完之后就需要工作人员对其及时的进行更换和处理，是一种便宜而且应用较多的一种控制设备。而断路器则具备着电动遥控功能，保护功能较为完整，且调整方便，能够在故障断开时候继续进行使用的优势。
There is no obvious difference between circuit breaker and fuse, and there is no great difference in their application. They are all equipment mainly used for open circuit protection. However, the fuse belongs to disposable equipment when in use. After use, it needs to be replaced and treated by staff in time. It is a cheap and widely used control equipment. The circuit breaker has the advantages of electric remote control function, complete protection function, convenient adjustment and continuous use in case of fault disconnection.
四、选择方案
4、 Option
（1）对于一般设备，一般配电柜内保护电器宜选用熔断器。因为熔断器限流特性好，便宜，易满足选择性要求。但供电用电设备不多，且偶然停电影响不太大时，也可以选择非选择性断路器。
(1) For general equipment, fuses should be selected for protective appliances in general distribution cabinets. Because the fuse has good current limiting characteristics, low price and easy to meet the selectivity requirements. However, when there are few power supply and consumption equipment and the impact of accidental power failure is not too great, non selective circuit breaker can also be selected.
（2）终端配电箱内保护电器通常选用非选择型断路器或漏电保护器，以提高保护电器灵敏度。
(2) Non selective circuit breaker or leakage protector is usually selected for the protective appliances in the terminal distribution box to improve the sensitivity of the protective appliances.
（3）二者的配合，如果安装点的预期短路电流小于断路器的额定分段，可采用熔断器作为后备保护，因为熔断器的额定短路分析能力较强。
(3) If the expected short-circuit current at the installation point is less than the rated section of the circuit breaker, the fuse can be used as backup protection because the rated short-circuit analysis ability of the fuse is strong.
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