Electrical Wall Bushing Terminal with Dual-Side Access
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Solution Overview
Problem
Existing electrical feed-through terminal blocks with plug-in zones for test and/or isolating plugs require opening the control cabinet for maintenance, increasing effort and risking accidents, as the plug must be inserted from the outside even when extensive work is needed inside.
Innovation Solution
The electrical feed-through terminal block features insertion openings on at least two sides, allowing the test and/or isolating plug to be inserted from either side, enabling access from outside when the cabinet is closed or inside when open, with contact units designed for safe and reliable operation, including resilient materials and elongated loop contact sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the test plug insertion zone is arranged on the outside of the control cabinet, then testing can be performed without opening the cabinet, but maintenance effort increases when the cabinet is open as the test plug must still be inserted from the outside
Solution Approach 1:
The housing is divided into multiple sides with separate insertion openings, allowing the test plug to be accessed from different directions depending on the operational context (cabinet open or closed)
Solution Approach 2:
The insertion openings are distributed on different sides of the housing, adding spatial dimensionality to the access points, enabling flexible approach directions for test plug insertion
2Reliability
If the test plug must be inserted from the outside even when the cabinet is open, then the testing function is maintained, but the risk of accidents increases and safety is compromised
Solution Approach 1:
Multiple insertion openings on different sides of the housing allow selection of the safest access direction based on the operational state of the cabinet
Solution Approach 2:
Instead of requiring all insertions from the outside, the invention allows insertion from the inside when the cabinet is open, inverting the traditional access direction to improve safety
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
This configuration simplifies maintenance by allowing plug insertion from either side, reducing the need to open the cabinet, enhancing safety, and reducing the risk of accidents by providing flexible and secure access for testing and maintenance without routing cables around an open door.
Implementation Method 1
contact units which touch one another in a contact area and which consist at least partially of resilient material
Data Source
AI summary
An electrical wall bushing terminal (1) having a housing (2) and having a contact device (3) on which a plug zone (4) is provided for holding a test and/or disconnecting plug (5). A first conductor connection (6) is provided, and is connected to a first contact unit (7) of the contact device (3). A second conductor connection (8) is connected to a second contact unit (9) of the contact device (3). The housing (2) has insertion openings (12, 13) on two sides (10, 11), of which in each case one test and/or disconnecting plug (7) can be inserted into the plug zone (4) in order to make contact with the first and second contact units (7, 9).