Arc extinguishing cover for small circuit breaker40

The arc-extinguishing cover of this miniature circuit breaker employs a multi-plate arc-extinguishing structure internally, effectively dispersing arc energy, reducing contact wear, and enhancing the breaker's reliability under frequent operation.

Product Detail

Product Description

This arc-extinguishing cover serves as a critical functional component in low-voltage circuit breakers, specifically designed to improve safety and reliability during frequent operating conditions. The internal multi-plate arc-extinguishing structure effectively disperses and controls the arc, significantly reducing the direct impact of arc energy on contacts and surrounding components, thereby providing reliable assurance for the circuit breaker's long-term stable operation.
During circuit breaker tripping, high-temperature, high-energy arcs are generated at the instant of contact separation. The multi-plate arc-extinguishing structure rapidly divides the arc into multiple segments, elongating and dispersing it across several arc-extinguishing plates. This accelerates the arc's cooling and extinction process. This design effectively reduces localized heat concentration, minimizes arc erosion and wear on contact surfaces, helps maintain optimal contact conditions, and extends the circuit breaker's service life.
The arc-extinguishing cover's structural layout thoroughly considers the arc's movement path and heat release characteristics. The multi-plate arc-extinguishing plates are arranged rationally with uniform spacing, enabling rapid guidance and containment of the arc during the breaking instant to prevent disorderly diffusion. This stable, controllable arc-extinguishing method is particularly crucial for applications involving frequent closing and opening operations, effectively reducing performance fluctuations and failure risks caused by arc impact.
Regarding materials and manufacturing processes, the arc-extinguishing cover's overall structure exhibits excellent heat resistance, mechanical strength, and electrical insulation properties. It withstands the repeated high temperatures and mechanical stresses generated during frequent interruptions. The multi-plate structure resists deformation or displacement under long-term operating conditions, ensuring sustained and stable arc-extinguishing performance. This meets the reliability and consistency requirements for low-voltage circuit breakers.
This miniature circuit breaker arc extinguishing hood is suitable for diverse low-voltage distribution applications, including building power distribution systems, industrial control equipment, complete switchgear assemblies, and terminal power protection systems. It can be widely integrated with miniature circuit breakers of various specifications. By effectively reducing contact wear and arc impact, the product plays a positive role in enhancing circuit breaker durability and lowering maintenance frequency.
Overall, this product leverages the efficient energy dispersion capability of its multi-plate arc-extinguishing structure to significantly enhance circuit breaker reliability and service life under frequent operation conditions. It represents a critical component within the key parts of low-voltage miniature circuit breakers.

Composition

3 arc-extinguishing grid sheets + 2 red steel cardboard sheets. The raw material for the arc-extinguishing grid sheets is ST12 0.8 steel plate, and the raw material for the red steel cardboard is Class C hard steel cardboard NF-77 0.8.