A changeover switch switches an entity’s electricity supply from the general grid power supply to a “generator system” in case of a power outage. The changeover switch connects to the main power grid, generator, or alternate source, and the entity wiring. When you switch or “Change over”, all the power on that circuit changes from either Grid or Generator. (not allowing it to flow back into each other (Grid and generator)) The IMPACT Series of changeovers witches are designed for harsh Australian conditions and are designed to give full motor control in a unit that is rated IP55. It is manufactured from impact and chemical-resistant material and will withstand harsh treatment in most industrial environments. That’s right, five years!