What does the use of an isolator switch accomplish in an electrical circuit?

The use of an isolator switch in an electrical circuit is primarily designed to disconnect the circuit safely. This function is crucial in ensuring the safety of both personnel and equipment during maintenance or when a fault has occurred. By providing a means to effectively isolate a section of the circuit from the power source, the isolator switch allows for work to be performed without the risk of electric shock or further damage to the system.

When the isolator switch is activated, it creates a clear disconnection point, ensuring no current flows in the section of the circuit under maintenance. This capability is particularly important in industrial and commercial settings, where dealing with high voltages is common, and safety protocols must be strictly followed.

While other options may relate to different aspects of electrical circuits, they do not pertain directly to the isolator switch's specific function of safely disconnecting circuits.