MI Cable Termination with Recessed Insulating Block
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Solution Overview
Problem
Minerally insulated (MI) cables are notoriously difficult to terminate and connect in high-temperature environments due to their brittle nature and susceptibility to damage from external interactions, leading to unreliable connections.
Innovation Solution
An insulating connector with recessed channels and protective plates provides a robust and reliable connection for MI cables, featuring a cover with protective plates that offer increased toughness and structural integrity, along with a substrate and lid for enhanced protection and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pot seals and terminal tags are used to connect MI cables, then electrical connection is achieved, but the connection is easily damaged and unreliable due to the brittle nature of MI cable
Solution Approach 1:
The patent applies beforehand cushioning by providing a recessed channel in the insulating block that cradles and supports the MI cable and pot seal assembly. This recessed structure is designed to accommodate the components and protect them from external impacts and stresses before damage can occur, thereby preventing the brittle MI cable from being subjected to harmful forces during operation.
Solution Approach 2:
The patent introduces an insulating block with recessed channels as an intermediary structure between the MI cable/terminal tag assembly and the external environment. This intermediary provides mechanical support, electrical insulation, and protection, mediating the connection between components while shielding the brittle MI cable from direct exposure to damaging external factors.
2Reliability
If MI cable is terminated using conventional methods, then electrical connection is established, but external interactions cause damage to the cabling and terminating means
Solution Approach 1:
The recessed channel design provides beforehand cushioning by creating a protected cavity that cradles the MI cable and pot seal. This structure anticipates and prevents external damage by providing mechanical support and isolation before harmful interactions can occur, ensuring connection stability throughout the operational life of the cable termination.
Solution Approach 2:
While not a flexible shell per se, the recessed channel structure functions similarly by providing a protective enclosure that isolates the brittle MI cable from external mechanical interactions. The insulating block acts as a rigid protective shell that shields the internal components from damage while allowing electrical functionality.
3Object-affected harmful factors
If protective measures are added to protect MI cable connections, then damage resistance improves, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single insulating block structure. The block simultaneously provides electrical insulation, mechanical support through recessed channels, and protection from external damage. By combining these functions into one integrated component rather than separate protective elements, the design achieves high damage resistance without proportionally increasing device complexity.
Solution Approach 2:
The insulating block serves multiple universal functions: it provides electrical insulation between conductors, mechanical support for the MI cable and terminal tags, structural protection against external impacts, and organization of the cable assembly. This multi-functionality reduces the need for additional specialized protective components, maintaining simplicity while achieving robust protection.
Data Source
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AI summary
The present invention relates to an assembly for the improved connection or termination of one or more minerally insulated cables, the assembly comprising an electrically insulating plate comprising one or more channels to accommodate and support one or more inward cables; one or more channels to accommodate and support one or more outward cables; one or more recesses to accommodate one or more electrical components; one or more terminal studs arranged to connect said at least one inward and outward cable; and a protective cover comprising one or more protective plates locatable over the electrically insulating plate and cables and further comprising one or more recesses located so as to provide access to each of the one or more terminal studs.