High-voltage DC relay with improved arc extinguishing ability

Abstract

The invention discloses a high-voltage direct-current relay with improved arc extinction capability. The high-voltage direct-current relay is provided with a frame, a fixed spring part and a moving spring part, wherein the fixed spring part is provided with a leading-out terminal, an insulating sleeve and a fixed contact; the fixed contact is of a step structure, and is provided with a protruding edge, one end of the fixed contact is connected with the leading-out terminal, the other end is matched with a moving contact; the insulating sleeve is arranged on the fixed contact; connection between the leading-out terminal and the fixed contact is realized by riveting and welding; the moving spring part is arranged below the fixed contact. The step structure is adopted for the fixed contact, one end of the fixed contact is connected with the leading-out terminal, the other end of the fixed contact is matched with the moving contact, and the fixed contact is provided with the protruding edge. The insulating sleeve is arranged on the fixed contact, and a lug boss is arranged on the insulating sleeve. The fixed contact is inserted into the leading-out terminal, and is riveted or welded, and the insulating sleeve is arranged between the fixed contact and the leading-out terminal in a step form, so that the insulating distance is prolonged, and the detachment rate is low. Broken electric arcs are insufficient in length, so that high-voltage high-current switching is unlikely to realize. The leading-out terminal is inserted into the fixed contact, and the step form is adopted, so that the fixed contact can be connected by riveting or welding.

Description

technical field [0001] The invention relates to a relay, in particular to a high-voltage direct-current relay with improved arc extinguishing capability. Background technique [0002] Existing relays are usually difficult to achieve high voltage and high current switching under non-vacuum conditions. When the moving contact and static contact are switched under load conditions, an arc will be generated between the contacts, and the arc will be affected by the external magnetic field. Down will move in a certain direction. When the load increases, the arc length will be longer, making it difficult to break. [0003] The current conventional technical solution is to use a ceramic or engineering plastic frame, the movable reed is disconnected from the lead-out end, and a magnetic field (magnetic steel) is placed outside the cavity to form an arc blowing for the contact switching. [0004] The relay disclosed in Japanese patent JP2012038683 adopts a built-in ring-shaped perman...

AI Technical Summary

Problems solved by technology

[0002] Existing relays are usually difficult to achieve high voltage and high current switching under non-vacuum conditions. When the moving contact and static contact are switched under load conditions, an arc will be generated between the contacts, and the arc will be affected by the external magnetic field. down will move in a certain direction

When the load increases, the arc length will be longer, making it difficult to break

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