接觸器是一種用來自動地接通或斷開大電流電路的電器，它可以頻繁地接通或分斷交流電路，并可實現(xiàn)遠距離控制。其主要控制對象是電動機，也可用于其它負載，具有控制容量大、過載能力強、壽命長、設備簡單經(jīng)濟等特點，因此在電器控制中應用十分廣泛。

Contactor is an electrical appliance used to automatically connect or disconnect high current circuits. It can frequently connect or disconnect AC circuits and realize remote control. Its main control object is the motor, which can also be used for other loads. It has the characteristics of large control capacity, strong overload capacity, long service life, simple and economical equipment, so it is widely used in electrical control.

接觸器利用主接點來開閉電路，用輔助接點來執(zhí)行控制指令。主接點一般只有常開接點，而輔助接點常有兩對具有常開和常閉功能的接點，小型的接觸器也經(jīng)常作為中間繼電器配合主電路使用。接觸器的接點，由銀鎢合金制成，具有良好的導電性和耐高溫燒蝕性。

The contactor uses the main contact to open and close the circuit and the auxiliary contact to execute the control command. The main contact generally has only normally open contact, while the auxiliary contact often has two pairs of contacts with normally open and normally closed functions. Small contactors are often used as intermediate relays to cooperate with the main circuit. The contact of the contactor is made of silver tungsten alloy, which has good conductivity and high temperature ablation resistance.

接觸器的動作動力來源于交流電磁鐵，電磁鐵由兩個“山”字形的幼硅鋼片疊成，其中一個固定，在上面套上線圈，工作電壓有多種供選擇。為了使磁力穩(wěn)定，鐵芯的吸合面，加上短路環(huán)。接觸器在失電后，依靠彈簧復位。另一半是活動鐵芯，構造和固定鐵芯一樣，用以帶動主接點和輔助接點的開短。

The action power of the contactor comes from the AC electromagnet. The electromagnet is stacked by two "mountain" shaped young silicon steel sheets, one of which is fixed and covered with a coil. There are a variety of working voltages to choose from. In order to stabilize the magnetic force, a short-circuit ring is added to the suction surface of the iron core. After the contactor is powered off, it depends on the spring to reset. The other half is a movable iron core, which has the same structure as the fixed iron core to drive the opening and shortening of the main contact and auxiliary contact.

20安培以上的接觸器加有滅弧罩，利用斷開電路時產(chǎn)生的電磁力，快速拉斷電弧，以保護接點。接觸器制作為一個整體，外形和性能也在不斷提高，但是功能始終不變。無論技術的發(fā)展到什么程度，普通的接觸器還是有其重要的地位。

Contactors above 20 amps are equipped with arc extinguishing cover, which can quickly pull off the arc by using the electromagnetic force generated when disconnecting the circuit to protect the contact. The contactor is made as a whole, and its shape and performance are also improving, but its function remains unchanged. No matter what degree of technology development, ordinary contactor still has its important position.

然而，ABB接觸器代理人員認為接觸器因其特殊的工作環(huán)境，難免會發(fā)生各種故障，如果不能及時有效的發(fā)現(xiàn)故障并排除之，必然會對電氣設備的正常工作帶來影響，甚至導致電氣設備燒毀的嚴重后果。

However, abb contactor agents believe that due to its special working environment, contactors will inevitably have various faults. If the faults can not be found and eliminated in time and effectively, it will inevitably affect the normal operation of electrical equipment, and even lead to the serious consequences of burning electrical equipment.

接觸器的主觸點是靠手動操作或電動合閘的。主觸點閉合后，自由脫扣機構將主觸點鎖在合閘位置上。過電流脫扣器的線圈和熱脫扣器的熱元件與主電路串聯(lián)，欠電壓脫扣器的線圈和電源并聯(lián)。

The main contact of the contactor is closed manually or electrically. After the main contact is closed, the free tripping mechanism locks the main contact in the closing position. The coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, and the coil of the undervoltage release is connected in parallel with the power supply.

當電路發(fā)生短路或嚴重過載時，過電流脫扣器的銜鐵吸合，使自由脫扣機構動作，主觸點斷開主電路。當電路過載時，熱脫扣器的熱元件發(fā)熱使雙金屬片上彎曲，推動自由脫扣機構動作，主觸點斷開主電路。

In case of short circuit or serious overload of the circuit, the armature of the overcurrent release is pulled in to make the free tripping mechanism act, and the main contact disconnects the main circuit. When the circuit is overloaded, the thermal element of the thermal release generates heat, bends the bimetallic sheet, pushes the free release mechanism to act, and the main contact disconnects the main circuit.

當電路欠電壓時，欠電壓脫扣器的銜鐵釋放，也使自由脫扣機構動作，主觸點斷開主電路。當按下分勵脫扣按鈕時，分勵脫扣器銜鐵吸合，使自由脫扣機構動作，主觸點斷開主電路。

When the circuit is under voltage, the armature of the under voltage release releases, which also makes the free release mechanism act, and the main contact disconnects the main circuit. When the shunt release button is pressed, the armature of the shunt release is pulled in to make the free release mechanism act, and the main contact disconnects the main circuit.

接觸器工作原理及會出現(xiàn)的故障內(nèi)容就講解到這里了，如果您有什么發(fā)現(xiàn)或者想了解的內(nèi)容可以隨時來網(wǎng)站www.haoyuanxb.com聯(lián)系我們進行解答！

The working principle and faults of the contactor will be explained here. If you find anything or want to know, you can visit www.haoyuanxb.com at any time Com contact us for answers!