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本文给出的触点元件和开关装置图形符号,仅描述一个触点或开关器件的功能,不必与器件结构相关联。符号中小圆(空心或涂黑)表示铰链点,可在大多数触点,开关装置符号上不示出。为清楚起见,这个小圆.在某些符号上必须画出,不能省略。
The contact symbols and switchgear symbols given in this document describe only the function of a contact or switching device and do not have to be associated with the device structure. The small, medium (hollow or black) symbol indicates the hinge point, which is not visible on most contacts, switchgear symbols. For the sake of clarity, this small circle must be drawn on some symbols and can not be omitted.