Modular Grounding Device for Retrofitting Without Circuit Disassembly
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Solution Overview
Problem
Existing electrical grounding systems require complete disassembly for retrofitting or repairing collar type grounding bushings, which is cumbersome, especially in space-constrained applications, and may lead to unsafe conditions if not properly installed.
Innovation Solution
A modular electrical grounding device comprising two collar members with radially extending shoulder projections and thickened wall regions, allowing for adaptable positioning and easy retrofitting without disassembling the grounding circuit, featuring a removable ground lug member for secure attachment to the collar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a traditional collar type grounding bushing is used, then the grounding circuit is secure and reliable, but complete disassembly is required for retrofitting or repair which is cumbersome and time-consuming
Solution Approach 1:
The grounding bushing is divided into multiple separable components: a collar portion that remains installed on the conduit, and a ground lug portion that can be independently attached or removed. This segmentation allows the ground lug to be replaced or repositioned without removing the entire bushing assembly, enabling quick retrofitting while maintaining the secure connection of the collar to the conduit.
Solution Approach 2:
The ground lug is designed with dynamic attachment capabilities through threaded holes and fastening mechanisms that allow it to be securely fastened or easily removed from the collar. This dynamic design enables the ground lug to be repositioned to different locations on the collar without requiring complete disassembly of the grounding circuit, significantly reducing retrofitting time while maintaining connection reliability.
2Adaptability or versatility
If a fixed position ground lug is used in a hinged collar design, then the grounding function is maintained, but the bushing becomes unwieldy in space-constrained applications
Solution Approach 1:
By separating the ground lug from the collar structure and providing independent attachment points, the design eliminates the need for complex hinged mechanisms. The ground lug can be positioned at any of multiple locations on the collar, providing installation adaptability without adding mechanical complexity. This simple segmented design is much more suitable for space-constrained applications compared to hinged designs.
3Ease of repair
If the grounding circuit is completely disassembled for retrofitting, then repairs can be made, but the grounding connection may become compromised and unsafe conditions may arise
Solution Approach 1:
The segmentation of the grounding bushing into collar and ground lug portions that can be independently accessed allows repair work to be performed on the ground lug while the collar remains securely connected to the conduit. This maintains the integrity of the grounding connection throughout the repair process, eliminating the safety risks associated with complete disassembly while still enabling necessary repairs.
Data Source
AI summary
An electrical grounding device includes a first and a second collar member, each having inner and outer wall surfaces, a flange projecting from the inner wall surface, and a shoulder projection extending radially from the outer wall surface. Further, the device includes a thickened wall region including an aperture passing transversely therethrough, wherein the thickened wall region is disposed in the outer wall surface of at least one of the first and second collar members. A fastener is operably associated with the shoulder projections of the first and second collar members to removably couple the shoulder projections together. Such coupling configures the inner wall surfaces to define an opening disposed through the electrical grounding device.