Electromagnetic relay capable of preventing arc short circuit

Abstract

The invention discloses an electric arc short circuit prevention electromagnetic relay, which comprises a base, a magnetic circuit part and a contact part, and is characterized in that the base is provided with a first accommodating cavity, a plurality of partition plates are arranged in the first accommodating cavity and divide the first accommodating cavity into a plurality of partition cavities, and the side surface of the first accommodating cavity is provided with a first opening leading to each partition cavity; the contact part comprises a plurality of contact units, each contact unit comprises a movable spring component and a static spring component which are arranged in the corresponding separation cavity, and an armature of the magnetic circuit part is matched with each movable spring component through a pushing card; the device further comprises a first flash barrier, the first flash barrier seals all or part of the first opening, a plurality of first baffles are arranged on the inner side face of the first flash barrier, at least one first baffle is laterally inserted into each partition cavity, and the first baffles are adjacent to or abut against the partition plates of the partition cavities to form at least two arc barrier walls located between the adjacent partition cavities. According to the invention, inter-phase arc short circuit caused by arc generated by breaking of the movable spring component and the static spring component can be avoided.

Description

technical field [0001] The invention relates to an electromagnetic relay, in particular to an electromagnetic relay for preventing arc short circuit. Background technique [0002] Electromagnetic relay is a relay that uses electromagnetic force to drive the relative movement of mechanical parts to produce a predetermined response. It generally consists of a magnetic circuit part, a moving spring part, a static spring part, a base and a shell. The magnetic circuit part includes an iron core and an enameled wire wound Coil frames, armatures, yokes, etc. When the coil (that is, the enameled wire) passes through the current, an electromagnetic force is generated, and the armature is attracted and contacts the pole surface of one end of the iron core, thereby driving the moving contact of the moving spring part to contact or separate from the static contact of the static spring part; when the coil is in the When the current disappears, the electromagnetic force disappears, the a...

AI Technical Summary

Problems solved by technology

The multiple sets of contacts of this electromagnetic relay are usually located in independent compartments. The compartments have side openings and are covered by a housing. However, due to the gap between the partitions between the compartments and the housing, the When this kind of electromagnetic relay is used to switch multi-phase high current (such as three-phase 500A short-circuit current), the arc generated by the breaking of the contacts is easy to enter the adjacent compartment, resulting in arc short circuit and even explosion

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