Lead-through Terminal Gap Closure via Pivotable Actuating Device
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Solution Overview
Problem
Existing feedthrough terminals lack a reliable mechanism to ensure complete closure of gaps between the actuating device and the wall bushing, compromising safety and protection in the contact position, especially when handling conductors with large cross-sections.
Innovation Solution
A feedthrough terminal design featuring a pivotable actuating device with a closure web and deflector, which closes gaps between the actuating device and the terminal housing, and a clamping spring mechanism providing high clamping forces with a large opening angle, allowing for secure clamping of conductors up to 35 mm² without bending, and ensuring protection in the contact position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the actuating device is designed to pivot through a large angle to accommodate large conductors, then the accessibility and clamping capability for large conductors is improved, but gaps may arise between the actuating device and terminal housing that compromise safety
Solution Approach 1:
The closure web is pre-configured on the actuating device to automatically close the gap at the wall bushing when the actuating device is in the contact position. This preliminary structural arrangement ensures that safety protection is already in place before the device is operated, preventing any potential exposure of internal components during the clamping process.
Solution Approach 2:
The actuating device is segmented into functional components including the closure web as a separate element that can independently manage gap closure. This segmentation allows the closure web to specifically address the safety concern at the wall bushing without interfering with the overall pivoting motion required for clamping large conductors.
2Strength
If the actuating device pivots through a large opening angle to clamp large conductors without bending, then the clamping force and conductor integrity are improved, but the gap closure reliability may deteriorate
Solution Approach 1:
The closure web is designed to automatically close the gap at the wall bushing through its own structural configuration as the actuating device pivots into the contact position. This self-service mechanism eliminates the need for additional actuators or complex control systems, ensuring reliable gap closure while maintaining the large opening angle necessary for clamping large conductors with sufficient force.
3Reliability
If the wall bushing is completely closed to protect internal components, then the protection and safety are improved, but the pivoting movement space for the actuating device is reduced
Solution Approach 1:
The closure web provides localized closure specifically at the wall bushing area where gap formation is most critical for safety. This localized approach protects internal components from exposure without requiring complete enclosure of the entire actuating device, thereby preserving the necessary pivoting movement space for operating on large conductors.
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
The solution provides a safe, reliable, and efficient method for securing conductors of various sizes, ensuring complete closure of gaps and protection within the terminal housing, even for large conductors, while maintaining ease of assembly and operation.
Implementation Method 1
at least one clamping spring (101) is provided for applying a clamping force for clamping the conductor to the current bar
Implementation Method 2
The actuating device is designed and set up to clamp a conductor on a conductor receptacle in the contact position and to release and/or pick up a conductor on the conductor receptacle in the open position
Data Source
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AI summary
The invention relates to a lead-through terminal (100) having a terminal housing (150) that can be accommodated on a wall (501) of an electrical construction unit (500), wherein the terminal housing (150) comprises a wall passage (154) and a pivotable actuating device (103). The actuating device (103) can be pivoted between a contact position (145) and an open position (144). The actuating device is configured and set up to clamp a conductor (126) on a conductor receptacle (115) in the contact position (145), and in the open position (144), to release or receive a conductor (126) on the conductor receptacle (115). A gap (148) between the actuating device (103) and the wall passage (154) that is present during the pivoting of the actuating device (103) between the open position (144) and the contact position (145) is closed, at least in the contact position (145).