What is the use of the backup protection switch of the surge protector

The backup protection switch on a surge protector is designed to protect your electronic devices from power surges and other electrical disturbances.

In the event of a surge, the surge protector diverts excess voltage away from your electronics and into the ground wire, thereby protecting your devices from damage. However, in the event that the surge protector itself becomes damaged or overloaded, the backup protection switch can serve as a failsafe, cutting off power to your electronics and preventing any further damage.

Essentially, the backup protection switch provides an additional layer of protection for your devices, ensuring that they are shielded from electrical disturbances both upstream and downstream of the surge protector itself. It's important to note, however, that the backup protection switch should not be relied upon as the primary means of protection, and should be used in conjunction with other surge protection measures, such as circuit breakers and grounding wires.