Patent ID: 6066932
Filing Date: 2000-05-23
Classification: H02H

Abstract:
A reversal protection apparatus for use with an electrical multiphase motor interconnected on a circuit to a power source through multiphased power lines, the electrical multiphase motor having an established normal directional rotation, the apparatus comprising:a rotatable phase sequence detector with a power input from said power lines, the detector including a means for sensing the phase sequence of the power input, said detector interconnected between the power source and the electrical multiphase motor;a normal direction contactor and a reverse direction contactor, both said contactors in articulation with the sensing means of the phase sequence detector;a correcting means communicating with said contactors to start the electrical multiphase motor in the established rotational direction and prevent its rotation in the opposite direction; and,wherein the correcting means starts the electrical multiphase motor without intervention obviating a necessity for resetting the apparatus upon detection of a phase reversal, whereby the electrical multiphase motor starts without intervention and operates in the established direction via a corrected phase sequence of said input.