High-voltage dc relay with permanent magnet arc extinguishing function

Abstract

A high-voltage DC relay capable of longitudinally drawing arc, comprising two static contact leading-out terminals and one movable contact piece; the movable contact piece being arranged under the two static contact leading-out terminals, and two ends of the movable contact piece functioned as movable contacts being respectively cooperated with bottom ends of the two static contact leading-out terminals functioned as static contacts; first permanent magnets being respectively arranged at positions corresponding to the contacts around the movable contact piece, and a side having polarity of each of the first permanent magnets faces the corresponding contact, such that arc extinction is implemented using a horizontal magnetic field formed by the first permanent magnets; under the movable contact piece, second permanent magnets are arranged at a position where the static contacts are in contact with the movable contacts, and polarity of a contact-facing sides of the second permanent magnets is opposite to the polarity of the contact-facing sides of the first permanent magnets, such that the magnetic field strength at the contacts can be enhanced using a longitudinal magnetic field formed by the first permanent magnets and the second permanent magnets at the static and movable contacts, and then the arc extinction is implemented.

Dependencies are inferred from the claim text.