Error-Proof Plug Tab Structure for Coil and Main Circuit Wiring
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Solution Overview
Problem
Existing systems face challenges in preventing wrong wiring between coil and main circuit plug tabs, leading to potential short circuits and equipment damage, particularly due to inconsistent voltage specifications and similar plug tab designs.
Innovation Solution
The design incorporates a plug tab with a body, a plug-in part, and an error preventing part that interferes with incorrect terminal plugging, ensuring only the correct terminal can be connected, thus preventing wrong wiring and reducing the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If coil plug tab and main circuit plug tab adopt the same specifications, then the wiring process is simpler, but wrong wiring between coil and main circuit may occur
Solution Approach 1:
The patent applies asymmetry by giving the coil plug tab and main circuit plug tab different structural specifications. The coil plug tab includes a coil fixing structure that prevents it from being inserted into the main circuit terminal, while the main circuit plug tab has a different structure that prevents insertion into the coil terminal. This asymmetric design ensures that each plug tab can only be connected to its corresponding terminal, eliminating wrong wiring while maintaining wiring simplicity.
Solution Approach 2:
The patent implements preliminary anti-action by designing the plug tabs with built-in prevention structures before wiring occurs. The coil fixing structure on the coil plug tab and the corresponding structural differences create inherent barriers that prevent incorrect connections from being made in the first place, rather than relying on post-wiring detection or correction.
2Reliability
If different specifications are used for coil plug tab and main circuit plug tab, then wrong wiring is prevented, but some coil terminals cannot be plugged into main circuit
Solution Approach 1:
The asymmetric design ensures that each plug tab type has unique structural features that provide both specificity and compatibility. The coil fixing structure on the coil plug tab provides specificity for coil terminal connection, while the overall plug tab design maintains compatibility with the terminal interface standards, allowing proper connections without wrong wiring.
3Reliability
If additional wire cable is added to prevent coil from wrongly wiring, then wiring accuracy improves, but cost and installation space increase
Solution Approach 1:
The patent merges the error prevention function directly into the plug tab structure itself. The coil fixing structure is integrated with the plug tab body, combining the connection function and the error prevention function into a single component. This eliminates the need for separate additional wire cables or external prevention devices, reducing overall system complexity while maintaining wiring accuracy.
Data Source
AI summary
The disclosure provides a plug tab and a contactor and relates to technical field of electric power. The plug tab comprises: a body connected to a first conductive member; a plug-in part disposed on the body, the plug-in part is configured to be detachably connected to a first terminal; and an error preventing part disposed on the body, serves to interfere with plugging of a second terminal into the plug-in part; wherein the first terminal and the second terminal are different. The conduction between the first conductive member and the external current is realized by the plug-in part configured to be detachably connected to the first terminal. The error preventing part can interfere with plugging of the second terminal into the plug-in part by the arrangement of the error preventing part, such that the plug tab can only be corresponding to and matching with the first terminal.