Rax-Tech International offers Surface / Flush Mounted Automatic Phase Changeover. Rax-Tech International is an ISO 9001:2008 registered company. Surface / Flush Mounted Automatic Phase Changeover monitor the incoming voltage in all 3 phases using reliable and rugged sensors. Surface / Flush Mounted Automatic Phase Changeover automatically transfers the equipment supply to the healthiest phase in the event of power failure or low voltage in up to 2 of the 3 incoming phases. The low voltage cutoff is a smart unique feature with Avail APC protects you equipment from the harmful effects of unhealthily low voltage. It is available in the brand name of Avail APC.