问答题

、画出热继电器的热元件和触头的符号，并标出文字符号，各连接在什么电路中？热继电器会不会因电动机的起动电流过大而立即动作？对于定子绕组是△形连接的异步电动机应如何选择热继电器？

答案：答案：热继电器的热元件和触头的符号如下：1. 热元件符号：热元件通常用两个并联的螺旋线表示，符号为“ ”。热元件是热继电...

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