Circuit Breaker Insulation Barrier Layout to Prevent Roof-Box Arcing
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Solution Overview
Problem
Existing cut-off equipment for railway vehicles does not effectively prevent the formation of electric arcs between the central connection and other elements within the electric box, particularly due to limited space and exposure to harsh weather conditions.
Innovation Solution
The equipment features barriers extending beyond the conductive rings to cover the conductive areas of the wall, with insulating columns and barriers made from ceramic or composite materials, which increase the path distance for potential electric arcs and reduce the risk of arc formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit breaker is placed in a low-profile electrical box parallel to the running plane, then the available vertical space is reduced and mounting on the roof is enabled, but electrical arcs can form between the central connection and other elements of the electrical box
Solution Approach 1:
An insulating barrier is introduced as an intermediary element between the conductive ring (central connection) and the conductive wall area. This barrier physically separates the two conductive surfaces, preventing direct electrical contact and arc formation while allowing the compact low-profile configuration to be maintained.
Solution Approach 2:
The insulation solution moves from a vertical arrangement (insulators positioned above the breaker) to a horizontal/directional arrangement (barriers extending radially from the conductive ring). The barrier extends in a direction away from the wall to provide insulation coverage, enabling compact vertical spacing while preventing arcs through horizontal separation.
2Object-affected harmful factors
If insulators are positioned vertically above the circuit breaker, then electrical arcs are prevented, but the vertical space requirement increases and roof mounting becomes difficult
Solution Approach 1:
The insulation approach is transformed from vertical positioning (insulators above the breaker) to radial/horizontal positioning (barriers extending from the conductive ring perpendicular to the wall). This dimensional change allows the same arc-prevention function to be achieved within limited vertical space, enabling roof mounting.
Solution Approach 2:
Instead of providing insulation throughout the entire vertical space above the breaker, the barrier provides localized insulation only in the specific region where arc formation is most likely - between the conductive ring and the adjacent wall area. This targeted approach reduces overall space requirements while maintaining safety.
3Ease of manufacture
If the conductive ring is exposed to the wall's conductive area, then assembly is simplified, but electrical arcs can form between these conductive surfaces
Solution Approach 1:
The insulating barrier serves as a mediator placed between the exposed conductive ring and the wall's conductive area. This allows both surfaces to remain exposed and accessible for assembly purposes while the barrier prevents harmful electrical discharge between them.
Solution Approach 2:
The barrier is designed as a separate, distinct component that can be independently manufactured and positioned between the conductive ring and wall. This segmentation allows for simplified assembly where the barrier is installed as a discrete element rather than requiring integrated insulation design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents electric arcs, ensures compact and safe operation of the circuit breaker, and allows for easy maintenance while maintaining mechanical and economical assembly, thus protecting the vehicle's electrical network.
Implementation Method 1
at least one of the sections comprises at least one barrier covering the conductive ring at the level of a region of the conductive ring opposite the conductive area of the wall closest to the ring
Implementation Method 2
The solution effectively prevents electric arcs, ensures compact and safe operation of the circuit breaker
Data Source
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AI summary
Electrical disconnection equipment (10) comprising a housing (12) and a circuit breaker (14) disposed in the housing (12), the circuit breaker (14) having at least two sections (26, 32, 38) positioned along a principal axis (XX) in line with each other, one of which internally delimits a disconnection space (59), the two sections (26, 32, 38) being separated by a conductive ring (41, 42), the housing (12) having at least one wall having at least one conductive zone (22) exposed opposite the circuit breaker (14), characterized in that at least one section (26, 32, 38) has at least one barrier (61, 62, 66) covering the conductive ring (41, 42) at a region (50) of the conductive ring (41, 42) opposite the conductive zone (22) of the wall closest to the ring (41, 42).