Arc extinguishing cover of molded case circuit breaker33

Product Description

This arc-extinguishing cover is strictly designed in accordance with core industry standards for low-voltage electrical equipment. It deeply aligns with the application requirements of various low-voltage power distribution scenarios in industrial, commercial, and residential settings. Through optimized structural design and premium material selection, it precisely enhances the safety protection level of circuit breakers under extreme breaking conditions such as short circuits and overloads, establishing a core defense line for the stable operation of low-voltage power systems.
During the design and development phase, the product thoroughly considers the operational characteristics and safety requirements of the low-voltage electrical industry. It optimizes the arc-extinguishing channel layout and grid spacing to meet the breaking demands of circuit breakers across different power ratings. Its unique arc-guiding structure rapidly directs arcs into the arc-extinguishing chamber. Combined with the cutting and cooling effects of high-strength, high-temperature-resistant grids, it instantly elongates and extinguishes arcs during short-circuit breaking. This significantly reduces the risk of arc reignition while effectively limiting arc energy dispersion, preventing thermal damage to the circuit breaker housing and surrounding components.
Addressing the unique demands of overload breaking scenarios, the product employs enhanced insulation isolation design and optimized thermal stability. This ensures consistent insulation performance and arc-extinguishing effectiveness even under prolonged high-temperature conditions caused by extended overload operation. The selected arc-resistant resin composite material exhibits outstanding anti-aging and anti-erosion properties, withstanding the instantaneous high-temperature impact and chemical corrosion during short-circuit breaking. This extends product lifespan while eliminating safety hazards such as insulation breakdown and leakage caused by material failure.
As a core accessory for low-voltage circuit breakers, this arc-extinguishing cover seamlessly integrates with mainstream low-voltage circuit breaker models, requiring no additional adjustments for assembly. Whether in power distribution for factory production lines, lighting systems in commercial buildings, or distribution terminals in residential communities, its industry-compliant precision design significantly enhances circuit breaker breaking reliability and safety redundancy. This helps users meet safety acceptance standards for low-voltage distribution systems while reducing risks of equipment damage and safety incidents caused by short circuits or overload faults, making it an ideal component for low-voltage electrical applications.

Composition

19 arc-extinguishing grid plates + 2 insulating partitions.

The arc-extinguishing grid plates are made of cold-rolled strip steel #10, which has undergone Cu10Ni5 salt spray 48H coating and has a hardness ≤150HV0.2;

The insulating partitions are made of red steel paper.

Parameters