一、低壓熔斷器
1、 Low voltage fuse
低壓熔斷器是一種簡單的電路保護電器，其原理是當流經熔斷器的電流達到或超過定值一定時間后，本身的熔體熔化，切斷電路。其動作原理簡單，安裝方便，一般不單獨使用，主要用來配合其他電器使用。
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、低壓斷路器
2、 Low voltage circuit breaker
低壓斷路器又稱為自動開關，俗稱空氣開關。當進行自動控制或保護控制操作時，斷路器可以在綜保裝置控制下進行電路的分斷或接通操作。斷路器不僅可以通斷正常的負荷電流，而且能夠承受一定時間的短路電流，并可以分斷短路電流，切除故障線路和設備。
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、二者的區別
3、 The difference between the two
斷路器和熔斷器二者間不存在明顯的差異，其應用也沒有太大的區別。都是以斷路保護作用為主的設備。但熔斷器在使用的時候屬于一次性設備，在使用完之后就需要工作人員對其及時的進行更換和處理，是一種便宜而且應用較多的一種控制設備。而斷路器則具備著電動遙控功能，保護功能較為完整，且調整方便，能夠在故障斷開時候繼續進行使用的優勢。
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、選擇方案
4、 Option
（1）對于一般設備，一般配電柜內保護電器宜選用熔斷器。因為熔斷器限流特性好，便宜，易滿足選擇性要求。但供電用電設備不多，且偶然停電影響不太大時，也可以選擇非選擇性斷路器。
(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）終端配電箱內保護電器通常選用非選擇型斷路器或漏電保護器，以提高保護電器靈敏度。
(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，如果安裝點的預期短路電流小于斷路器的額定分段，可采用熔斷器作為后備保護，因為熔斷器的額定短路分析能力較強。
(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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