High-Voltage Terminal Shield With Reconfigurable Bushing Openings
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Solution Overview
Problem
High-voltage electrical bushings require adaptable shields with selectively openable and closable openings to balance electrical shielding with the need for variable electrical interconnect configurations, which existing solutions either increase manufacturing costs or complicate installation by requiring multiple shield configurations.
Innovation Solution
A modular shield system comprising a first shield element with axial and lateral openings and a second movable shield element that can be configured to open or close these openings, allowing for multiple configurations without the need for multiple shield types, enabling efficient installation and testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shield with fixed openings is used to allow electrical interconnects to pass through, then the shield provides electrical shielding, but the shield cannot be adapted to different interconnect configurations
Solution Approach 1:
The shield incorporates movable closure elements that can transition between open and closed positions, allowing the shield to dynamically adapt its configuration based on installation requirements. This enables a single shield design to serve multiple interconnect configurations without requiring multiple different shield types.
Solution Approach 2:
The shield is designed with multiple movable closure elements that can be independently positioned, allowing a single universal shield design to accommodate various interconnect configurations. This multi-functional design eliminates the need for multiple specialized shield types while maintaining electrical shielding effectiveness.
2Adaptability or versatility
If multiple different shields in different configurations are provided, then the shield can be adapted to different interconnect configurations, but manufacturing costs and installation time increase
Solution Approach 1:
A single universal shield design with movable closure elements replaces multiple specialized shield types. The closure elements can be positioned to create different opening configurations as needed, allowing one shield to perform the functions of multiple different shields and eliminating the time required to select and install the correct shield type for each configuration.
Solution Approach 2:
The movable closure elements enable the shield to be reconfigured during installation to match the required interconnect configuration, eliminating the need to pre-select a specific shield type. This dynamic reconfigurability streamlines the installation process by allowing adaptability without requiring multiple inventory items.
3Reliability
If openings in the shield are kept closed to maintain electrical shielding, then electrical shielding performance is improved, but electrical interconnects cannot be mounted
Solution Approach 1:
The closure elements are designed to be movable between closed and open positions. During installation, they can be opened to allow electrical interconnects to pass through the shield. After installation, they can be closed to restore the electrical shielding performance. This dynamic capability allows the shield to provide both access and protection as needed.
4Ease of manufacture
If a single modular shield form is used, then manufacturing costs are reduced, but the shield must be configurable to provide required openings
Solution Approach 1:
The shield is divided into a base structure and separate movable closure elements. This segmentation allows the main shield body to be manufactured as a single standardized component, while the closure elements can be added as simple attachments. This reduces manufacturing complexity and cost compared to creating multiple different shield types, while still providing the needed configurability.
Data Source
AI summary
An aspect of the present disclosure provides a shield for a terminal of a high-voltage electrical device including a first shield element having at least one axial opening and at least one lateral opening, and at least one second shield element, wherein the at least one second shield element is moveable between a first shield position and a second shield position for selectively opening and closing at least one of the at least one axial opening and the at least one first lateral opening. Further aspects provide a high-voltage electrical bushing comprising a shield according to the aspect above, and a transformer including said high-voltage electrical bushing. Yet a further aspect provides a method for installing a high-voltage bushing having a shield according to the aspect above.