Circuit Breaker Wire Retention Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrical switching apparatus, such as circuit breakers, face challenges in efficiently retaining and routing accessory wires due to limited space and the need to avoid interference with internal components while meeting regulatory requirements, leading to potential wire misplacement and strain issues.
Innovation Solution
An accessory wire retention assembly that includes an insert with molded features and a fastening mechanism, such as a wire tie, to securely position and route wires within the circuit breaker housing, minimizing interference with internal components and providing strain relief by transferring pulling forces to the housing base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wires are routed freely within the circuit breaker housing, then installation flexibility is improved, but wire misplacement and interference with internal components occurs
Solution Approach 1:
The patent introduces wire retention assemblies and routing channels as intermediary structures between the wires and the housing. These intermediaries guide wires along predetermined paths, ensuring proper positioning while maintaining installation flexibility. The retention assemblies act as mediators that constrain wire movement without requiring complex fixed mounting structures.
2Manufacturing precision
If wire retention structures are added to ensure proper wire positioning, then wire positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated structures. The wire retention assemblies are molded as single pieces that simultaneously provide wire routing guidance, strain relief, and structural support. Routing channels are formed directly into the housing structure, eliminating the need for separate mounting brackets or fasteners, thus reducing overall device complexity while maintaining positioning accuracy.
Solution Approach 2:
The patent employs flexible wire retention features such as elastomeric straps and collapsible walls within the housing that can adapt to wire bundles of varying sizes. These flexible structures provide precise wire positioning through elastic retention forces while maintaining a simple overall structure that can accommodate different wire configurations without requiring complex adjustable mechanisms.
3Adaptability or versatility
If wires are allowed to move freely, then adaptability to different wire configurations is improved, but strain relief and interference prevention deteriorate
Solution Approach 1:
The patent incorporates dynamic wire retention features that can adapt to different wire configurations. Collapsible walls and flexible retention straps can adjust their position and constraint level based on the wire bundle size and routing requirements. This dynamic behavior allows the structure to accommodate various wire configurations while consistently providing strain relief and preventing interference with internal components.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An accessory wire retention assembly is for an electrical switching apparatus, such as a circuit breaker. The circuit breaker comprises a housing, separable contacts and an accessory enclosed by the housing, an operating mechanism for opening and closing the separable contacts, and a number of wires adapted to be electrically connected to the accessory. The wires extend from the interior of the housing through an aperture to the exterior. The accessory wire retention assembly includes an insert which cooperates with the housing and to establish a predetermined position of the wires with respect to the accessory and the aperture, and a fastening mechanism which fastens the wires to the insert to maintain the wires in the predetermined position.