Arc extinguishing cover for small circuit breaker52

Product Description

Designed to address the high-energy breaking challenges faced by low-voltage distribution systems during short-circuit conditions, this arc-extinguishing cover significantly enhances the circuit breaker's breaking reliability and safety margin under short-circuit conditions through systematic optimization of arc diversion and cooling pathways. It serves as a critical functional component ensuring stable circuit breaker operation.
During short-circuit faults, the rapid separation of breaker contacts generates intense, highly concentrated arcs that severely stress internal structures and critical components. This arc extinguishing cover employs a scientifically designed internal structure to rapidly divert the arc upon formation, guiding its expansion and dispersion along predetermined paths. This prevents localized arc energy release, thereby reducing the impact of instantaneous thermal shock and electrical stress on the breaker body.
Simultaneously, the product features targeted optimization of the arc cooling pathway. During diversion, the arc is effectively elongated and comes into full contact with the surrounding medium within the cooling channels, accelerating heat dissipation and arc decay. This integrated diversion and cooling design helps shorten arc duration and enhance controllability during the breaking process, maintaining stable and reliable arc-extinguishing performance even under high short-circuit currents.
Regarding materials and structure, the arc-extinguishing cover is manufactured from stable insulating materials that balance thermal resistance, arc resistance, and mechanical strength. It withstands the instantaneous high temperatures, electrodynamic forces, and impact loads generated during short-circuit breaking. The stable structure ensures the diversion and cooling channels retain their original form and functionality after repeated short-circuit operations, delivering consistent arc-extinguishing performance for the circuit breaker.
This miniature circuit breaker arc extinguishing hood is suitable for diverse low-voltage distribution applications, including industrial power distribution systems, building power distribution installations, complete switchgear assemblies, and terminal power protection systems. By enhancing breaking reliability and safety margins under short-circuit conditions, the product plays a crucial role in reducing fault risks, protecting critical components, and elevating overall system safety levels.
Overall, through optimized design of arc diversion and cooling pathways, this product effectively enhances the circuit breaker's arc-extinguishing capability and operational safety during short-circuit conditions. It provides more reliable technical assurance for low-voltage power distribution systems and stands as a critical component within miniature circuit breakers.

Composition

7 arc-extinguishing grids + 2 fixing plates. The raw material for the arc-extinguishing grids is 2 sheets of cold-rolled steel SAE1010, and the raw material for the fixing plates is PA46 CR310.

Parameters