Installation Switching Device Contact Clamp Safety
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Solution Overview
Problem
Existing installation switching devices face issues with incorrect conductor insertion due to free spaces between the clamping frame and conductor insertion opening, which can lead to improper clamping and potential electrical hazards.
Innovation Solution
A tub-shaped clamp covering part with a skirt that protrudes over the second narrow end side, preventing incorrect insertion by covering the free space and providing contact protection, coupled with latching arms for secure assembly and a protruding portion for additional safety, ensuring the clamping frame is correctly assembled and preventing external contact with live parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamp covering part is attached to the clamping frame, then contact protection and prevention of incorrect insertion is improved, but device complexity increases
Solution Approach 1:
The clamp covering part is integrated with the clamping frame by coupling it to the longitudinal sides of the clamping frame, merging the protective function with the existing clamping structure. This reduces the need for separate protective components while maintaining contact protection and preventing incorrect insertion.
Solution Approach 2:
The clamp covering part serves multiple functions simultaneously: it provides contact protection by covering live parts, prevents incorrect insertion by blocking access to the free space, and integrates with the clamping frame structure. This multi-functionality improves reliability without proportionally increasing device complexity.
2Reliability
If the clamp covering part covers the free space, then prevention of incorrect insertion is improved, but ease of operation deteriorates
Solution Approach 1:
The clamp covering part is designed to be coupled to the clamping frame before the clamping operation, preliminarily establishing the protective barrier that prevents incorrect insertion. This preliminary configuration ensures that the free space is already covered before the conductor insertion process begins, maintaining both safety and operational ease.
3Reliability
If a tub-shaped clamp covering part with skirt is used, then contact protection is improved, but manufacturing complexity increases
Solution Approach 1:
The clamp covering part is segmented into distinct functional elements: the tub-shaped main body that provides contact protection, the skirt that extends to cover the free space, and the coupling mechanisms that attach it to the clamping frame. This segmentation allows for simplified manufacturing of individual components that are then assembled, reducing overall manufacturing complexity while maintaining enhanced contact protection.
Data Source
AI summary
An installation switching device includes: a housing; and at least one contact clamp, which is arranged in the housing, for connecting at least one electrical conductor through a conductor insertion opening that is provided in the housing, the contact clamp including a clamping frame that has a rectangular cross section and a clamping screw that engages in a first narrow end side of the clamping frame and a clamping end of the clamping screw being cooperating with a section of a contact rail that is fixedly mounted in the housing of the installation switching device, the section being located within the clamping frame, so that a second narrow end side that lies opposite the first narrow end side and is connected thereto via two longitudinal sides that lie opposite one another presses an inserted connecting conductor against a surface of the contact rail that is remote from the clamping screw.