Arc extinguishing cover of frame circuit breaker1

Product Description

The arc-extinguishing cover of a frame circuit breaker is one of the critical core components ensuring safe and reliable breaking. Its performance directly impacts the breaker's breaking capacity, service life, and the overall operational safety of the power distribution system. Our frame circuit breaker arc-extinguishing covers are precision-manufactured using highly heat-resistant, high-strength insulating materials, combined with advanced structural design concepts. They operate stably under high-current and high-voltage conditions, meeting the stringent safety and reliability requirements of medium- and high-voltage power distribution systems.
In material selection, the arc extinguishing cover utilizes composite insulating materials with outstanding heat resistance, arc erosion resistance, and excellent insulation properties. These materials effectively withstand the instantaneous high temperatures and intense thermal shocks generated by arcs, significantly reducing the risk of material aging and structural damage to ensure long-term operational stability. Additionally, the material possesses good mechanical strength and crack resistance, maintaining structural integrity even under frequent switching operations and complex operating conditions.
Structurally, the arc extinguishing cover employs multi-level segmentation and multi-channel layout. By scientifically guiding the arc's path, it effectively elongates, divides, and cools the arc. When the circuit breaker interrupts current, the arc is rapidly drawn into the cover's interior. Within its narrow, winding channels, the arc is continuously stretched, dispersed, and cooled, accelerating arc extinction and significantly enhancing the breaker's interrupting capacity and current-limiting performance. This design not only enhances the system's safety factor but also effectively reduces contact erosion, extending the overall service life of the circuit breaker.
Additionally, the arc-extinguishing cover features a compact overall structure and strong installation compatibility, ensuring seamless integration with various frame circuit breaker models for easy maintenance and replacement. Its stable and reliable arc-extinguishing performance enables the circuit breaker to swiftly and safely interrupt circuits even under extreme conditions such as short-circuit faults or grid impacts, safeguarding equipment and personnel.
This frame circuit breaker arc extinguishing hood is widely applicable in medium- and high-voltage power distribution systems, industrial power systems, and large-scale building and infrastructure power distribution scenarios. It serves as a critical safeguard for enhancing the safety, reliability, and operational efficiency of power distribution equipment. Through continuous technological optimization and stringent quality control, this product delivers long-term, stable, safe, and efficient electrical protection solutions for users.

Composition

1 mounting plate + 1 arc-starting plate + 5 arc-blocking plates + 4 screw assemblies + 8 arc-extinguishing components + 17 arc-extinguishing plates + 4 rivets

Mounting plate: 4 cold-rolled steel plates 10
Arc-blocking plates: No. 3 and 6 are PA46 GF30 FR(17) V-0 natural color; No. 4 and 7 are 2.5 melamine rigid laminate; No. 5 is reinforced molding compound 4342 (DMC-1)
Screw assembly: GB/T 9074.4 M4X10
Arc-extinguishing components: No. 9 and 10 are PA46 GF30 FR(17) V-0 natural color; No. 11 is 1 stainless steel mesh SUS304
Arc-extinguishing plates: No. 12 is 3.5 cold-rolled steel plates 10; No. 13 and 14 are 2.5 cold-rolled steel plates 10
Rivets: 2.5 round copper wire T2-H04

Parameters