Cable Core Short-Circuit Ring for Backflow Isolation
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Solution Overview
Problem
During repair work on voltage cables, electricity can flow back into the network from the consumer side, posing life-threatening risks due to existing short-circuiting methods that do not effectively isolate the cores.
Innovation Solution
A short-circuiting device with releasable ring parts and conductive components that securely connect the cable cores to an electrically conductive ring, allowing safe absorption of forces and ensuring electrical isolation by using a cross-shaped support and press-through contacts to connect the cores effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional short-circuiting methods are used, then electrical connection is established, but worker safety is compromised due to inability to prevent backflow of electricity
Solution Approach 1:
The short-circuiting device is divided into multiple independent clamp elements (first clamp element, second clamp element, etc.) that can be separately applied to different cores. Each clamp element independently establishes electrical connection with its respective core, allowing systematic and complete short-circuiting of all cores including neutral and phase conductors, thereby preventing backflow of electricity and ensuring worker safety.
Solution Approach 2:
The short-circuiting device is designed as a multi-functional tool that can short-circuit multiple types of conductors (neutral conductor, phase conductors) simultaneously using multiple clamp elements. The device provides universal applicability for different core configurations and ensures complete electrical isolation from both sides of the cable joint, addressing the limitation of traditional single-function short-circuiting methods.
2Strength
If releasable ring parts are used to connect cores, then electrical connection is established and forces are absorbed, but device complexity increases
Solution Approach 1:
The device employs ring parts with curved or annular geometry that naturally absorb and distribute mechanical forces generated during short-circuiting. The circular shape of the rings provides structural strength to withstand electromagnetic forces while maintaining a relatively simple overall device architecture, avoiding the need for complex force-distribution mechanisms.
Solution Approach 2:
The clamp elements are integrated with the ring parts to form a unified structure where the clamp elements attach to the rings. This merging of components allows the device to achieve both electrical connection functionality and mechanical force absorption capability without requiring separate independent systems, thereby limiting the increase in device complexity.
3Reliability
If multiple clamp elements are used to secure cores, then electrical connection is improved, but ease of operation decreases
Solution Approach 1:
The device is segmented into multiple independently adjustable clamp elements, each capable of being individually positioned and secured around its respective core. This segmentation allows operators to work on one core at a time, simplifying the installation process compared to attempting to secure multiple cores simultaneously, while ensuring reliable electrical connection for each core.
Solution Approach 2:
The clamp elements are designed with movable or adjustable characteristics that allow dynamic positioning and adaptation to different core sizes and positions. This dynamic capability facilitates easier operation during installation and removal, as each clamp element can be independently adjusted without affecting the others, maintaining ease of operation despite the multi-element design.
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
Enables safe and efficient repair work by preventing backflow of electricity, ensuring worker safety and efficient connection/disconnection of cable cores.
Implementation Method 1
the ring parts are configured to connect the cores in electrically conductive manner to the electrically conductive ring
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 1F~1G
AI summary
Short-circuiting device for short-circuiting cores of a voltage cable relative to each other, with the feature that the short-circuiting device comprises an electrically conductive ring, wherein the short-circuiting device is provided with at least two releasable ring parts which can be arranged round cores of the voltage cable, wherein in mounted state the ring parts are configured to connect the cores in electrically conductive manner to the electrically conductive ring.