Split Electrical Grounding Bushing with Guard Tabs
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Solution Overview
Problem
Existing split or sectioned grounding bushings for electrical conduits often have gaps in insulation, which can lead to damage to electrical conductors or wires and create hazardous conditions, especially when installed after the electrical connections are finalized.
Innovation Solution
A split bushing design with separable portions that form a continuous ring of electrical insulation, featuring insulating bushing portions with guard tabs that cover gaps between the bushing portions, and a secure locking mechanism using end and central locking tabs to ensure a gap-free insulation ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a split or sectioned grounding bushing is used to allow installation after electrical connections are finalized, then ease of operation is improved, but insulation continuity deteriorates due to gaps forming between sectioned portions
Solution Approach 1:
A flexible insulating material is introduced as an intermediary substance between the rigid bushing sections to fill the gap and maintain insulation continuity. This mediator allows the sections to remain separable for installation while ensuring no insulating gap exists between them when assembled.
Solution Approach 2:
The insulating material is designed as a flexible shell or film that can deform to fill the gap between bushing sections. This flexibility allows the insulating material to conform to the slight misalignments between sections while maintaining continuous insulation coverage.
2Reliability
If a closed ring-shaped bushing is used to provide continuous insulation, then insulation continuity is improved, but ease of operation deteriorates because it cannot be installed after electrical connections are finalized
Solution Approach 1:
The bushing is divided into multiple separable sections that can be opened and installed independently. This segmentation allows the bushing to be placed on the conduit after electrical connections are made, then assembled into a complete ring structure.
Solution Approach 2:
The bushing transitions from a static closed ring to a dynamic openable structure during installation. The sections can be separated for installation access, then reassembled to form the protective ring, providing operational flexibility without sacrificing final insulation continuity.
3Ease of operation
If a hinged split bushing with latch structure is used to enable post-connection installation, then ease of operation is improved, but manufacturing complexity increases due to additional hinge and latch components
Solution Approach 1:
The complex hinge and latch mechanisms are extracted and replaced with a simpler fastening system. The bushing sections are joined using basic fasteners or interlocking features that achieve the same functional result with fewer components and less manufacturing complexity.
Solution Approach 2:
Instead of using a hinge that allows continuous rotation and a latch to secure the position, the design inverts the approach by using a fastening system that directly secures the sections in the closed position, eliminating the need for complex mechanical joints.
Data Source
AI summary
A split electrical grounding bushing having adjacent bushing portions with insulating bushing portions having guard tabs covering a gap formed between the insulating bushing portions creating a continuous insulating ring. The bushing portions are connected by a hinge permitting the bushing to be placed over electrical conductors or wires after being installed. Gaps in the insulating bushing portion are covered by attached guard tabs improving the safety of a split electrical bushing. Locking tabs and openings are used to securely hold the insulating bushing portions onto the bushing portions. The split electrical bushing is placed on a distal end of an electrical conduit. The split bushing may be an electrical grounding bushing providing an electrical ground connection.