Switch closing or work contact. If the condition is true then the expression is closed. An example of a push to break switch is a button used to release a door held closed by an electromagnet.
A push to break or normally closed or nc switch on the other hand breaks contact when the button is pressed and makes contact when it is released.
Thermal magnetic switch it is the symbol of thermal magnetic switch. An example of a push to break switch is a button used to release a door held closed by an electromagnet. Disconnectors unipolar switch symbols. On off switch spst spst single pole single throw.
