ABB contactor uses main contact to open and close circuit and auxiliary contact to execute control command. The main contact usually has only normally open contact, while the auxiliary contact often has two pairs of normally open and normally closed contacts. Small contactors are often used as intermediate relays to cooperate with the main circuit. The contact of AC contactor is made of silver tungsten alloy, which has good conductivity and high temperature ablation resistance. ABB small contactor is driven by AC electromagnet. The electromagnet is made up of two "mountain" shaped young silicon steel sheets, one of which is fixed and covered with coil. There are various working voltages to choose from.

為了使磁力穩(wěn)定，鐵芯的吸合面，加上短路環(huán)。交流接觸器在失電后，依靠彈簧復(fù)位。另一半是活動(dòng)鐵芯，構(gòu)造和固定鐵芯一樣，用以帶動(dòng)主接點(diǎn)和輔助接點(diǎn)的開(kāi)短。20安培以上的接觸器加有滅弧罩，利用斷開(kāi)電路時(shí)產(chǎn)生的電磁力，快速拉斷電弧，以保護(hù)接點(diǎn)。交流接觸器制作為一個(gè)整體，外形和性能也在不斷提高，但是功能始終不變。無(wú)論技術(shù)的發(fā)展到什么程度，普通的交流接觸器還是有其重要的地位。

In order to stabilize the magnetic force, a short-circuit ring is added to the pull-in surface of the iron core. AC contactor in the power loss, rely on spring reset. The other half is a movable iron core with the same structure as the fixed iron core, which is used to drive the opening and closing of the main contact and auxiliary contact. The contactors with more than 20 amperes are equipped with arc extinguishing cover. The electromagnetic force generated when the circuit is disconnected can quickly pull off the arc to protect the contact. AC contactor as a whole, shape and performance are constantly improving, but the function is always the same. No matter to what extent the technology develops, ordinary AC contactor still has its important position.

小型接觸器其實(shí)就是一種短路保護(hù)器，廣泛用于配電系統(tǒng)喝控制系統(tǒng)，主要進(jìn)行短路保護(hù)或嚴(yán)重過(guò)載保護(hù)。工作時(shí)，熔斷器串連在被保護(hù)的電路中。當(dāng)電路發(fā)生短路或嚴(yán)重過(guò)載時(shí)，熔斷器中的熔斷體將自動(dòng)熔斷，起到保護(hù)作用，常見(jiàn)的就是保險(xiǎn)絲。另外還有斷路器,俗稱"空氣開(kāi)關(guān)",也是一種短路保護(hù)器,當(dāng)過(guò)流時(shí),它會(huì)自動(dòng)跳閘,起到保護(hù)作用;熔斷器、斷路器都是保護(hù)電器。

In fact, small contactor is a kind of short-circuit protector, which is widely used in power distribution system and control system, mainly for short-circuit protection or serious overload protection. When working, the fuse is connected in series in the protected circuit. When the circuit short circuit or serious overload, the fuse link in the fuse will automatically fuse, play a protective role, the common is the fuse. In addition, there is a circuit breaker, commonly known as "air switch", which is also a kind of short-circuit protector. When it is over-current, it will trip automatically and play a protective role; Fuses and circuit breakers are protective appliances.

但它們不是一樣.斷路器是總稱，它分為兩種——框架式斷路器和塑料外殼式斷路器。框架式斷路器俗稱萬(wàn) 能斷路器；塑料外殼式斷路器俗稱空氣開(kāi)頭。他們具有短路和過(guò)載保護(hù)，可重復(fù)使用。壽命一般在幾千次到幾萬(wàn)次。熔斷器是靠熔體熔化保護(hù)線路的一種電器，不可重復(fù)使用。保護(hù)以后需要更換熔體。

But they are not the same. Circuit breaker is a general term, it is divided into two kinds - frame circuit breaker and plastic case circuit breaker. Frame circuit breaker is commonly known as universal circuit breaker; Plastic case circuit breaker is commonly known as air circuit breaker. They have short circuit and overload protection and can be reused. The life span is from thousands to tens of thousands of times. The fuse is a kind of electric appliance which depends on the melt to protect the circuit, and can not be reused. The melt needs to be replaced after protection.

小型接觸器與斷路器的區(qū)別

Difference between small contactor and circuit breaker

他們相同點(diǎn)是都能實(shí)現(xiàn)短路保護(hù)，熔斷器的原理是利用電流流經(jīng)導(dǎo)體會(huì)使導(dǎo)體發(fā)熱，達(dá)到導(dǎo)體的熔點(diǎn)后導(dǎo)體融化所以斷開(kāi)電路保護(hù)用電器和線路不被燒壞。它是熱量的一個(gè)累積，所以也可以實(shí)現(xiàn)過(guò)載保護(hù)。一旦熔體燒毀就要更換熔體。斷路器也可以實(shí)現(xiàn)線路的短路和過(guò)載保護(hù)，不過(guò)原理不一樣，它是通過(guò)電流底磁效應(yīng)（電磁脫扣器）實(shí)現(xiàn)斷路保護(hù)，通過(guò)電流的熱效應(yīng)實(shí)現(xiàn)過(guò)載保護(hù)（不是熔斷，多疑不用更換器件）。具體到實(shí)際中，當(dāng)電路中的用電負(fù)荷長(zhǎng)時(shí)間接近于所用熔斷器的負(fù)荷時(shí)，熔斷器會(huì)逐漸加熱，直至熔斷。

They have the same point is that they can achieve short-circuit protection. The principle of fuse is to use the current flowing through the conductor to make the conductor heat up. After reaching the melting point of the conductor, the conductor melts, so the circuit is disconnected to protect the electrical appliances and lines from being burnt out. It is a accumulation of heat, so it can also achieve overload protection. Once the melt is burned, the melt should be replaced. The circuit breaker can also realize the short circuit and overload protection of the line, but the principle is different. It realizes the open circuit protection through the bottom magnetic effect of the current (electromagnetic release), and realizes the overload protection through the thermal effect of the current (not fusing, suspicious, no need to replace the device). In practice, when the power load in the circuit is close to the load of the fuse used for a long time, the fuse will be heated gradually until it is fused.

熔斷器的熔斷是電流和時(shí)間共同作用的結(jié)果起到對(duì)線路進(jìn)行保護(hù)的作用，它是一次性的。而斷路器是電路中的電流突然加大，超過(guò)斷路器的負(fù)荷時(shí)，會(huì)自動(dòng)斷開(kāi)，它是對(duì)電路一個(gè)瞬間電流加大的保護(hù)，例如當(dāng)漏電很大時(shí)，或短路時(shí)，或瞬間電流很大時(shí)的保護(hù)。當(dāng)查明原因，可以合閘繼續(xù)使用。像上面貼子說(shuō)的，熔斷器的熔斷是電流和時(shí)間共同作用的結(jié)果，而斷路器，只要電流一過(guò)其設(shè)定值就會(huì)跳閘，時(shí)間作用幾乎可以不用考慮。斷路器是現(xiàn)在低壓配電常用的元件。也有一部分地方適合用熔斷器，這里不再深入討論了。如果您對(duì)我們感興趣請(qǐng)關(guān)注我們網(wǎng)站，我們會(huì)持續(xù)更新，更多相關(guān)資訊請(qǐng)關(guān)注：http://www.xzthjc.com

The fusing of fuse is the result of the joint action of current and time, which plays the role of protecting the line. It is disposable. The circuit breaker is a sudden increase in the current in the circuit, when it exceeds the load of the circuit breaker, it will automatically open. It is a protection for the instantaneous current increase of the circuit, such as when the leakage is large, or when the short circuit, or when the instantaneous current is large. When the cause is found out, it can be switched on and used continuously. As mentioned in the above post, the fusing of fuse is the result of the combined action of current and time, while the circuit breaker will trip as soon as the current exceeds its set value, and the effect of time can hardly be considered. Circuit breaker is a common component in low voltage distribution. There are also some places suitable for fuse, which will not be discussed in depth here. If you are interested in us, please pay attention to our website, which will be updated continuously http://www.xzthjc.com