GIS Fixation Element Reduces Assembly Errors
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Solution Overview
Problem
Current fixing devices for high or medium voltage electrical substations in gas-insulated metal enclosures require lengthy on-site assembly and are prone to errors, especially in three-phase installations, where alignment and electrical connectivity are complex.
Innovation Solution
A fixing device featuring a threaded conductive rod with multiple threads and a conductive ring, allowing for partial pre-assembly in a factory, reducing on-site assembly time and errors, and ensuring gas-tightness with annular seals, while enabling easy handling and alignment through polarizing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional fixing devices are used with separate assembly components, then assembly flexibility is maintained, but on-site assembly time increases and assembly errors occur more frequently
Solution Approach 1:
The patent combines multiple separate assembly components (fixing member, washer, conductor, corona shield, and seal) into a single integrated fixing device. The fixing member includes integrated features for mechanical fastening, electrical connection, gas sealing, and corona protection, eliminating the need for separate assembly steps and reducing on-site assembly time and errors.
Solution Approach 2:
The fixing device performs multiple functions simultaneously: it mechanically fastens the conductor to the support insulator, provides electrical connection through the conductive fixing member, ensures gas tightness through the integrated seal, and prevents corona discharge through the integrated corona shield. This multi-functionality reduces the number of components needed and simplifies assembly.
2Reliability
If multiple separate components are assembled on-site, then adaptability to different installation configurations is maintained, but assembly errors and misalignment occur more frequently
Solution Approach 1:
The fixing device is pre-assembled with all necessary components (fixing member, washer, seal, and corona shield) in the correct configuration before delivery to the site. This preliminary assembly ensures proper alignment and positioning, eliminating on-site alignment errors and simplifying the installation process while maintaining adaptability to different configurations.
3Reliability
If traditional fixing members are used without integrated sealing, then manufacturing simplicity is maintained, but gas-tightness reliability decreases
Solution Approach 1:
The seal is integrated directly into the fixing member structure, forming a unified component that provides both mechanical fastening and gas sealing functions. This integration ensures reliable gas-tightness at the interface between the conductor, support insulator, and fixing device, while the compact integrated design does not significantly increase overall device complexity.
4Reliability
If conductive materials are used for the fixing member, then electrical connectivity is improved, but corona discharge risk increases without proper shielding
Solution Approach 1:
The corona shield is integrated with the conductive fixing member as a unified component. The conductive material provides excellent electrical connectivity for power transmission, while the integrated corona shield (made of conductive or partially conductive material) surrounds the conductor to control the electric field and prevent corona discharge, eliminating the harmful effects of using conductive materials.
Data Source
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AI summary
The invention relates to a securing device for an installation of the GIS type, having a threaded rod and a ring having a duct for receiving the threaded rod, the ring being housed in a supporting insulator which the installation has.