Dielectric Barrier Shield for Linear Power Shut-Off Contacts
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Solution Overview
Problem
Existing linear shut-off modules face challenges in maintaining effective dielectric separation between fixed contacts due to breaches in the dielectric barrier when the movable bar is in the open position, leading to potential electric arcs and safety risks.
Innovation Solution
Incorporating a deformable dielectric barrier shield device within the shut-off module housing, which adjusts its length based on the movable bar's position to maintain dielectric separation between fixed contacts, using telescopic, wound, or extensible designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the movable bar is made smaller in length to enable linear translation between open and closed positions, then the ease of operation is improved, but the dielectric barrier between fixed contacts is breached when the movable bar is in the open position, worsening the electrical safety
Solution Approach 1:
The patent introduces a dielectric barrier element as an intermediary component between the upstream and downstream fixed contacts. This barrier extends across the shut-off chamber when the movable bar is in the open position, preventing direct electric arc formation between contacts while allowing the movable bar to translate freely for operation.
Solution Approach 2:
The patent adds a spatial dimension to the dielectric barrier configuration by positioning it perpendicular to the movement direction of the movable bar. This creates a three-dimensional protective structure that maintains dielectric separation in the open position without interfering with the linear translation capability of the movable bar.
2Reliability
If the movable bar is extended to maintain dielectric separation, then the electrical safety is improved, but the movable bar collides with the housing walls, worsening the ease of operation
Solution Approach 1:
The patent segments the dielectric barrier function into two independent components: the movable bar for operational movement and the separate dielectric barrier element for electrical isolation. This segmentation allows each component to perform its specific function without compromising the other - the movable bar translates freely while the barrier maintains dielectric separation.
Solution Approach 2:
The dielectric barrier element serves as an intermediary structure that provides electrical isolation without being part of the movable bar assembly. This mediator component is positioned independently to maintain safety clearance between contacts while allowing the movable bar to operate through its full translation range without collision.
3Ease of manufacture
If a fixed dielectric barrier is used between fixed contacts, then the manufacturing simplicity is improved, but the dielectric performance varies with the position of the movable bar, worsening the electrical consistency
Solution Approach 1:
The patent implements a dynamic dielectric barrier configuration that adapts to the position of the movable bar. The barrier element is positioned and dimensioned to maintain effective dielectric separation whether the movable bar is in the open or closed position, ensuring consistent electrical performance throughout the operational range.
Solution Approach 2:
The patent optimizes the parameters of the dielectric barrier element (such as its length, position, and configuration) to maintain effective dielectric separation across all operational positions of the movable bar. This parameter optimization ensures consistent electrical performance while maintaining manufacturing simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures consistent dielectric performance and rapid arc extinction regardless of the movable bar's position, enhancing safety and electrical performance by preventing electric arcs and maintaining circuit integrity.
Implementation Method 1
the electrical characteristics of the shut-off apparatus are determined in part by the air volume in the shut-off chambers and the control of the dielectric separation between the fixed electrical current input contacts and the fixed electrical current output contacts
Data Source
AI summary
A power shut-off module includes an insulating housing, two pairs of fixed contacts and two movable contacts rigidly attached to an item of movable equipment that is movable in translation in the housing between an open position and a closed position. The module includes an insulating shield device having a fixed end rigidly attached to the housing and a movable end rigidly attached to the item of movable equipment, and which has a length that is variable between an extended position when the item of movable equipment is in the open position and a retracted position when the item of movable equipment is in the closed position, in order to create a dielectric barrier between the fixed contacts of one and the same pair of fixed contacts.