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主接點(diǎn)一般是常開(kāi)接點(diǎn)，而輔助接點(diǎn)常有兩對(duì)常開(kāi)接點(diǎn)和常閉接點(diǎn)，小型的接觸器也經(jīng)常作為中間繼電器配合主電路使用。

交流接觸器的接點(diǎn)，由銀鎢合金制成，具有良好的導(dǎo)電性和耐高溫?zé)�蝕性。

交流接觸器動(dòng)作的動(dòng)力源于交流通過(guò)帶鐵芯線圈產(chǎn)生的磁場(chǎng)，電磁鐵芯由兩個(gè)「山」字形的幼硅鋼片疊成，其中一個(gè)固定鐵芯，套有線圈，工作電壓可多種選擇。為了使磁力穩(wěn)定，鐵芯的吸合面加上短路環(huán)。總代理商3RB21334QW1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)的閉合斷開(kāi)。

20安培以上的接觸器加有滅弧罩，利用電路斷開(kāi)時(shí)產(chǎn)生的電磁力，快速拉斷電弧，保護(hù)接點(diǎn)。

接觸器具可高頻率操作，做為電源開(kāi)啟與切斷控制時(shí)﹐最高操作頻率可達(dá)每小時(shí)1200次。

接觸器的使用壽命很高，機(jī)械壽命通常為數(shù)百萬(wàn)次至一千萬(wàn)次，電壽命一般則為數(shù)十萬(wàn)次至數(shù)百萬(wàn)次。

技術(shù)發(fā)展

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。

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3RH2911-1HA11
3RH2911-1HA11-ZW98
3RH2911-1HA11-ZX95
3RH2911-1HA12
3RH2911-1HA13
3RH2911-1HA20
3RH2911-1HA20-ZW98
3RH2911-1HA20-ZX95
3RH2911-1HA21
3RH2911-1HA22
3RH2911-1HA22-ZW98
3RH2911-1HA22-ZX95
3RH2911-1HA30
3RH2911-1HA31
3RH2911-1LA11
3RH2911-1LA20
3RH2911-1MA11
3RH2911-1MA20
3RH2911-1NF02
3RH2911-1NF11
3RH2911-1NF20
3RH2911-2DA02
3RH2911-2DA11
3RH2911-2DA20
3RH2911-2DE11
3RH2911-2FA04
3RH2911-2FA40
3RH2911-2FB11
3RH2911-2FB22
3RH2911-2FC22
3RH2911-2GA04
3RH2911-2GA13
3RH2911-2GA22
3RH2911-2GA31
3RH2911-2GA40
3RH2911-2HA01
3RH2911-2HA02
3RH2911-2HA03
3RH2911-2HA10
3RH2911-2HA11
3RH2911-2HA12
3RH2911-2HA13
3RH2911-2HA20
3RH2911-2HA21
3RH2911-2HA22
3RH2911-2HA22-ZW96
3RH2911-2HA22-ZX95
3RH2911-2HA30
3RH2911-2HA31
3RH2911-2NF02
3RH2911-2NF11
3RH2911-2NF20
3RH2911-4DA11
3RH2911-4FA04
3RH2911-4FA40
3RH2911-4FB11
3RH2911-4FB22
3RH2911-4FC22
3RH2911-4GA04
3RH2911-4GA13
3RH2911-4GA22
3RH2911-4GA31
3RH2911-4GA40
3RH2911-4HA01
3RH2911-4HA02
3RH2911-4HA03
3RH2911-4HA10
3RH2911-4HA11
3RH2911-4HA12
3RH2911-4HA13
3RH2911-4HA20
3RH2911-4HA21
3RH2911-4HA22
3RH2911-4HA30
3RH2911-4HA31
3RH2911-4NF02
3RH2911-4NF11
3RH2911-4NF20
3RH2921-1DA02
3RH2921-1DA11
3RH2921-1DA20
3RH2921-2DA02
3RH2921-2DA11
3RH2921-2DA20
3RH2921-2DE11
3RH2921-4DA11
3RH2924-1GP1