Arc extinguishing cover of molded case circuit breaker14

Product Description

As a core critical component for molded case circuit breakers, this specialized arc extinguishing cover is specifically designed to enhance circuit breaker breaking performance and ensure the safe and stable operation of power systems. With its superior material properties and structural design, it has become the preferred component in industrial power distribution and complete electrical equipment applications.
Crafted from premium high-temperature-resistant insulating materials and processed through rigorous manufacturing techniques, the product exhibits outstanding resistance to high temperatures, arc erosion, and superior insulation properties. It withstands the intense thermal and electrical stresses generated during circuit breaker operation, effectively preventing insulation failure caused by material degradation. This fundamentally extends the service life of both the arc extinguishing cover and the entire circuit breaker assembly.
At the core functional level, this arc extinguishing cover employs a scientifically designed chamber structure to achieve precise arc segmentation and rapid cooling. When the circuit breaker interrupts fault current, the arc is rapidly drawn into the arc extinguishing cover. It is then segmented into multiple short arcs by multi-stage arc-isolating grids, significantly reducing arc voltage. Simultaneously, the low thermal conductivity of the insulating material, combined with the internal airflow channel design, rapidly dissipates arc heat, causing the arc to extinguish within an extremely short time. This significantly enhances the short-circuit breaking capacity and current-limiting capability of molded-case circuit breakers.
Reliable arc-extinguishing performance directly impacts the operational safety of power systems and equipment. This product effectively prevents risks such as arc reignition and arc flash short circuits, mitigating the expansion of faults that could endanger surrounding equipment and personnel. It provides robust safety assurance for distribution lines, industrial motors, complete switchgear assemblies, and other equipment. Whether in complex industrial power distribution scenarios or stable commercial building power supply systems, this dedicated arc-extinguishing cover for molded case circuit breakers plays a critical role, helping users build a safe, efficient, and stable power operation environment.
We consistently adhere to precision manufacturing principles. Each arc extinguishing cover undergoes rigorous factory testing to ensure dimensional accuracy and performance specifications perfectly match all mainstream molded case circuit breaker models, meeting installation and operational requirements across diverse scenarios. Choosing this product means adding a reliable safety barrier to your power system.

Composition

37 arc-extinguishing grids + 2 arc-isolating plates. The raw material for the arc-extinguishing grids is 1.2mm cold-rolled steel sheet 10mm, and the raw material for the arc-isolating plates is 1.2mm epoxy resin laminate EP GC201 yellow.

Parameters