Isolators are devices used to separate different parts of an electrical system, ensuring that electricity flows only where it is intended. They help prevent unwanted current from passing through, which can protect equipment and enhance safety. Isolators are commonly found in power plants and electrical substations, where they manage the distribution of electricity. These devices can be manual or automatic and are essential for maintenance and repair work. By isolating sections of a circuit, technicians can safely perform their tasks without the risk of electric shock. Isolators are crucial for the reliability of systems involving transformers, circuit breakers, and switchgear.