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发明授权
CN101507073B 用于装置（尤其是电动机）的热过载保护电路 有权

用于装置（尤其是电动机）的热过载保护电路
摘要：
本发明涉及一种用于防止装置(尤其是电动机)热过载的保护电路(1)，包括：第一连接件和第二连接件(2、3)，用于连接温度检测元件(4、11)；检测单元(6)，用于检测连接在所述第一连接件与所述第二连接件(2、3)之间的温度检测元件(4、11)的电阻值是处于第一电阻范围还是第二电阻范围；短路检测器，用于识别所述第一连接件与所述第二连接件(2、3)之间是否出现短路；复数个信号输出端(8、9)，当检测到的电阻值处于所述第二电阻范围和/或当所述短路检测器(10)识别到短路现象时，所述信号输出端向分析单元(14)发出信号；以及第三连接件(12)，通过预定电阻与所述第二连接件相连。
摘要（英）：

The invention relates to a protective circuit (1) for protection of an appliance, in particular of an electric motor, against thermal overloading, comprising a first and a second terminal (2, 3) for connecting a temperature detection element (4, 11); a detection unit (6) for detecting whether a resistance value of the temperature detector element (4, 11), which is connected between the first and the second terminals (2, 3), is in a first or a second resistance range; a short-circuit detector for identifying whether there is a short circuit between the first and the second terminals (2, 3); signalling outputs (8, 9) for emitting signal messages to an evaluation unit (14) when the detected resistance value is in the second resistance range and/or when a short circuit has been identified by the short-circuit detector (10); and a third terminal (12), which is connected to the second terminal via a predetermined resistance.

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