L&J GPE-3142-13201现货

L&J GPE-3142-13201
L&J GPE-3142-13201
L&J GPE-3142-13201
热继电器是一种利用电流的热效应工作的保护电器。热继电器由发热元件(电阻丝)、双金属片、传导部分和常闭触点组成，当电动机过载时，通过热继电器中发热元件的电流增加，使双金属片受热弯曲，带动常闭触点动作。热继电器常用于电动机的长期过载保护。当电动机长期过载时，热继电器的常闭触点动作，断开相应的回路，使电动机得到保护。由于双金属片的热惯性，即不能迅速对短路电流进行反应，而这个热惯性也是合乎要求的，因为在电动机起动或短时间过载时，热继电器不会动作，避免了电动机的不必要停车。

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