Arc extinguishing cover for small circuit breaker38

Product Description

This arc-extinguishing cover, specifically designed for low-voltage miniature circuit breakers, serves as a critical functional component ensuring safe disconnection during short circuits and abnormal operating conditions. Engineered to meet the safety, reliability, and consistency requirements of low-voltage distribution systems, it rapidly and effectively controls arcs during short-circuit events. By reducing concentrated energy release during disconnection, it significantly enhances the overall protection rating and operational safety of the circuit breaker.
During operation, when intense arcs are generated by separating circuit breaker contacts, the arc extinguishing cover rapidly encapsulates and guides the arc. Through its optimized internal structure and arc-quenching space layout, the arc is effectively confined within a controlled range. Arc energy is dispersed and attenuated within the hood, preventing the outward propagation of high-temperature, high-energy arcs and minimizing impacts on adjacent components and the external environment. This feature is particularly critical during high short-circuit currents with concentrated energy release, effectively mitigating safety risks from arc runaway.
The product's material and structural design balances thermal resistance, mechanical strength, and electrical insulation properties, enabling it to withstand the instantaneous high temperatures, electrodynamic forces, and impact loads generated during short-circuit interruption. The arc-extinguishing cover resists deformation and aging under repeated interruptions and long-term operation, ensuring sustained and stable arc-extinguishing performance to provide reliable, long-term protection for the circuit breaker. Additionally, its robust structural design maintains stability within the arc-quenching chamber, preventing structural changes from compromising arc-quenching effectiveness.
This miniature circuit breaker arc-quenching cover offers high structural compatibility with low-voltage miniature circuit breakers and features easy installation. It finds broad application in building power distribution systems, industrial power distribution equipment, complete switchgear assemblies, and end-user electrical protection scenarios. By effectively controlling arc behavior during short-circuit moments, the product significantly reduces contact erosion, lowers equipment failure rates, and enhances overall safety levels.
In summary, through rapid arc suppression and controlled energy release, this product delivers reliable safety assurance for low-voltage miniature circuit breakers. It contributes to elevated protection standards and operational stability within power distribution systems, making it an ideal solution for critical component selection in low-voltage circuit breakers.

Composition

2 arc-damping plates + 2 insulating plates + 31 arc-extinguishing grid plates.

The arc-damping plates are made of PA6-GF30 (A190G6HK) pine resin.

The insulating plates are made of epoxy board in natural color, with a specification of 0.5 (+0.02/-0.05) * 103(±0.25)mm.

The arc-extinguishing grid plates are made of Q235 strip steel that has undergone Cu3Ni2 salt spray 8H treatment, with a hardness ≤200HV 0.2. The specification for one bent piece is 0.8 (+0/-0.02) * 47.5 (±0.1)mm, the specification for two bent pieces is 0.8 (+0/-0.02) * 66.5 (±0.1)mm, and the remaining specifications are 0.8 (+0/-0.02) * 64 (±0.1)mm.

Parameters