Removable Electrical Interrupter With Inspection Windows
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Solution Overview
Problem
Existing removable electrical cut-off elements do not allow for non-destructive visual inspection of electrical contacts during maintenance, as they have sealed casings that prevent gas escape and do not facilitate access for inspection.
Innovation Solution
A removable electrical cut-off element with a nested casing structure and inspection windows that can be opened for visual access without compromising the sealing of cut-off gases, allowing for selective inspection and reassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the removable element has a sealed housing to prevent gas escape, then the sealing performance is improved, but the ability to visually inspect electrical contacts deteriorates
Solution Approach 1:
The housing is divided into a first housing part and a second housing part that can be reversibly separated. The first housing part contains inspection windows for visual inspection, while the second housing part contains the electrical contacts. When separated, the inspection windows provide access to view the contacts without compromising the overall sealing when assembled.
Solution Approach 2:
The housing transitions from a static sealed structure to a dynamic structure that can change configuration. The first and second housing parts can be reversibly moved between assembled and separated states, allowing the sealing performance and inspection capability to be activated as needed.
2Reliability
If the housing is sealed to contain shut-off gases, then the safety is improved, but the accessibility for maintenance inspection deteriorates
Solution Approach 1:
The housing is segmented into separable parts with the first housing part containing inspection windows. This allows maintenance personnel to separate the housing parts to visually inspect electrical contacts for wear or damage without destroying the element, improving ease of repair while maintaining safety when assembled.
Solution Approach 2:
The inspection windows are pre-positioned in the first housing part to provide preliminary visual access to the electrical contacts. This allows for preliminary inspection before full disassembly is required, facilitating earlier detection of maintenance needs.
3Reliability
If the housing is made opaque and sealed, then the gas containment is improved, but the visual observation of contact condition deteriorates
Solution Approach 1:
The housing is segmented with the first housing part containing transparent or translucent inspection windows. This segmentation allows visual information about contact wear to pass through the windows while the rest of the housing remains sealed to contain gases.
Solution Approach 2:
The first housing part has local transparency at the inspection window locations to allow visual observation, while the rest of the housing maintains opacity and sealing properties. This local quality change enables gas containment overall while providing specific viewing areas.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
This removable electrical current interruption element (6) comprises first (20) and second (22) housing sections that are nested and movable between an assembled and a partially disassembled configuration. The first housing section (20) has side walls (38) with through-hole inspection windows (60), and the second housing section has insulating walls (80), each of which delimits a volume within the second housing section around a corresponding movable conductor. The first and second housing sections are arranged so that, in the assembled configuration, the insulating walls (80) conceal the inspection windows (60), and in the intermediate configuration, the insulating walls are positioned away (80) from the inspection windows to allow access to them.