What is one method of de-energizing a seal-in circuit?

A seal-in circuit, also known as a holding circuit, is designed to maintain power to a load even after the initial control input is removed. This is commonly used in motor control to keep the motor running until intentionally stopped.

Using a stop pushbutton is a direct and effective method to de-energize the seal-in circuit. When the stop button is pressed, it breaks the connection in the circuit, causing the relay or contactor to open and subsequently stopping the current flow to the load. This action ensures that the circuit is intentionally and safely de-energized at the operator's discretion.

Other methods, such as turning off the main switch or removing a fuse, can also de-energize a circuit, but they are not as practical or immediate for stopping a specific seal-in circuit operation without affecting the entire system. A timer could potentially de-energize the circuit after a set period, but it is not a direct means of control by the operator and may not provide the immediate response needed to halt operations.