STOP PUSH BUTTON
This push button is part of the control circuit equipment that is used to disconnect and connect the circuit manually.
One of the important cases is the use of these buttons in industrial switchboards to start the engine or stop it.
Green color with open contact is usually used for connecting command and red color with closed contact is used for disconnecting command.
After changing the status, this type of button maintains its new status until pressure is applied to it again. Some types of lockable buttons have keys that are used for more security and to prevent unwanted status changes.