A safety switch, or disconnect switch, serves as a disconnect means for service entrances and fault protection for heavy machinery. The safety switch disconnects equipment from its power power source and permits safe entry for repairs, maintenance or emergencies.
Safety switches work by monitoring current in a circuit. If the switch detects a fault in the circuit, the switch will instantaneously shut off power to the circuit or device. Safety switches can detect electrical leak, short-circuits, overload, and even equipment failure.
A safety switch can also be triggered by operators or technicians when they open an access panel or guard door for equipment maintenance. When the door is opened, the switch automatically shuts off power to connected equipment and will not reset until the door is closed.