\u003C/p>\u003Cp> 在電器設(shè)備中，阻性負(fù)載的電器（電爐、加熱絲）功率都比較大，感性負(fù)載電器（水泵、電機(jī)）的功率也很大。如果直接用定時(shí)開關(guān)進(jìn)行控制，一下子就燒壞了。\u003C/p>\u003Cp> 1.正常情況下定時(shí)開關(guān)可以直接帶動(dòng)功率在660W以下的電器，是沒有任何問題的。\u003C/p>\u003Cp> 2.需要帶起更大的電器設(shè)備（大于660W），需要配合220V的交流接觸器使用（因?yàn)槎〞r(shí)開關(guān)也是220V的），這樣大功率的電器設(shè)備都能滿足定時(shí)開關(guān)的要求。\u003C/p>\u003Cp> 所以可以根據(jù)自己所需要的控制電器的功率，來合理選擇是否需要配合交流接觸器使用，電器功率小于660W，就不用，直接連接就可以，電器功率大于660W，就需要配合交流接觸器使用了。\u003C/p>\u003Cp> 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