A static side arc initiation plate, static contact and circuit breaker or disconnector contact structure

By optimizing the static contact structure and adding magnetic blocks, the magnetic blowing force is enhanced, solving the problem of insufficient magnetic blowing in the arc-extinguishing chamber under low current conditions and improving the arc-extinguishing efficiency.

CN224472366UActive Publication Date: 2026-07-07SHANGHAI SIEYUAN LOW VOLTAGE SWITCH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI SIEYUAN LOW VOLTAGE SWITCH CO LTD
Filing Date
2025-06-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Under low current conditions, the magnetic blow-off on the dynamic and static sides of the arc-extinguishing chamber is insufficient, making it difficult for the electric arc to enter the grid.

Method used

By optimizing the static contact structure, adding magnetizing blocks on the static and moving sides, and improving the design of the static and moving side arc-inducing plates, the magnetic blowing force is enhanced.

Benefits of technology

It improves arc extinguishing efficiency, promotes arc root transfer, and overcomes the problem of insufficient magnetic blow-off under low current conditions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224472366U_ABST
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Abstract

The application belongs to the technical field of switches, and particularly relates to a static-side arc striking plate, a static contact and a circuit breaker or disconnector contact structure. The static-side arc striking plate specifically comprises a three-part bending structure. An upper bending structure is parallel to a grid sheet, a middle bending structure is arranged obliquely, and a lower bending structure is attached to a static arc contact mounting surface of the static contact. Through electromagnetic field simulation, it is found that a local contact will generate a magnetic blow force opposite to the arc extinguishing chamber. The scheme improves the magnetic blow of the product by optimizing the contact structure and installing a magnetic enhancement block below the static and dynamic contacts.
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