When the start button on a motor control bucket is pressed, what type of contact does it operate?

When the start button on a motor control bucket is pressed, it typically operates a normally open contact. This type of contact is designed to be open in its default state, meaning that no current flows through it until the button is pressed. When the start button is activated, the contact closes, allowing current to flow and enabling the motor to start.

This functionality is essential in motor control circuits, where the start button's pressing action is a deliberate initiation of operation. The design ensures that the motor does not inadvertently start without intentional user input, improving safety and control in the system.

In contrast, normally closed contacts remain closed under normal conditions and would allow current to flow until the button is pressed, breaking the circuit. Isolated contacts do not interact with the control circuit in the same manner, and delayed contacts involve a timing mechanism that does not apply to the immediate action of pressing a start button. Therefore, activating a start button by pressing it is fundamentally linked to normally open contacts in motor control applications.