Patent ID: 9117605
Filing Date: 2015-08-25
Classification: H01H

Abstract:
1. A DC power relay comprising: a pair of fixed contacts located parallel to each other; a movable contact movable with respect to the pair of fixed contacts such that the movable contact may be in contact with or separated from the pair of fixed contacts; a pair of permanent magnets facing each other for externally guiding an arc generated by the movable contact; and a first damping magnet and a second damping magnet for reducing a force generated in a direction in which the movable contact is separated from the pair of fixed contacts, the first and second damping magnets having opposite magnetic fluxes such that they provide a repulsive force, wherein the first and second damping magnets, the pair of fixed contacts and the movable contact are located between the pair of permanent magnets, wherein a magnetic flux generated by the first damping magnet is opposite to a magnetic flux induced by current flowing into the movable contact when the movable contact is in contact with the pair of fixed contacts, wherein a magnetic flux generated by the second damping magnet is opposite to a flux induced by current flowing into the movable contact when the movable contact is in contact with the pair of fixed contacts.