An isolator switch, also known as a disconnector or disconnect switch, is a device used to ensure that an electrical circuit is completely de-energized for service or maintenance. It is used to isolate a circuit from the main power supply, disconnecting it from the power source so that the circuit can be maintained without interrupting power to the rest of the system. Isolator switches are commonly used as a safety measure against electric shock and are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair. They are also used for emergency stop buttons, as they can quickly and easily disconnect power to the circuit. Isolator switches can be operated manually or by a motor, and may be paired with an earthing switch to ground the portion that has been isolated from the system for ensuring the safety of equipment and the personnel working on it. There are many different types of isolator switches available in a variety of sizes, shapes, and colors, including double pole isolator switches and battery isolator switches.