Modular Contactor Design for Low-Voltage Switchgear
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Solution Overview
Problem
Existing low-voltage switchgear designs, such as contactors, require various configurations for different applications, leading to increased manufacturing costs and susceptibility to failure due to complex tools and dimensional deviations in small production quantities.
Innovation Solution
A contactor with a base module and a separable auxiliary module that allows for different connection technologies, enabling easy modification into various switchgear versions by replacing individual components, such as the auxiliary module, which can be manufactured using simpler tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contactors are manufactured as complete custom devices for each application, then device functionality and reliability are improved, but manufacturing costs and device complexity increase
Solution Approach 1:
The contactor device is divided into two separate modules: a basic module containing the main switching mechanism and an auxiliary module containing auxiliary contacts and coil connections. This segmentation allows the basic module to be manufactured once as a standardized component, reducing manufacturing complexity and costs, while the auxiliary module can be customized for different applications without requiring complete custom manufacturing of the entire device.
Solution Approach 2:
The basic module is designed as a universal component that can be used across multiple contactor variants. By standardizing the main switching mechanism and allowing different auxiliary modules to be attached, the system achieves multi-functionality - the same basic module serves different application requirements when combined with various auxiliary modules, thereby reducing overall device complexity while maintaining reliability.
2Manufacturing precision
If complete custom tools are manufactured for each switchgear version, then manufacturing precision is improved, but tool complexity and manufacturing costs increase
Solution Approach 1:
The manufacturing process is segmented into two stages: manufacturing the basic module using standardized tools for high precision, and manufacturing the auxiliary module using simpler tools. This segmentation eliminates the need for complex complete tools for each variant, as the basic module's precision requirements are met through standardized tooling, while auxiliary modules can be produced with less complex equipment.
Solution Approach 2:
The basic module is manufactured in advance as a standardized precision component using complex tools only once. This preliminary action allows subsequent auxiliary modules to be manufactured using simpler tools, as the critical precision requirements are already satisfied by the pre-manufactured basic module, thereby reducing overall tool complexity.
3Adaptability or versatility
If switchgear versions are customized for different applications, then adaptability is improved, but manufacturing costs increase
Solution Approach 1:
The contactor is segmented into a standardized basic module and customizable auxiliary modules. This allows different application requirements to be met by selecting and assembling different auxiliary modules with the same basic module, thereby achieving adaptability without the need to manufacture entirely custom devices for each application, which reduces manufacturing costs.
Solution Approach 2:
The invention merges a standardized basic module with various customizable auxiliary modules to create different switchgear versions. This combining approach allows adaptability for different applications while leveraging the cost benefits of standardized manufacturing for the basic module, thereby reducing overall manufacturing costs compared to complete custom manufacturing.
4Reliability
If auxiliary contacts and coil connections are integrated into the basic module, then device reliability is improved, but part variance and manufacturing complexity increase
Solution Approach 1:
The contactor is segmented into a basic module and a separate auxiliary module. The auxiliary module contains the auxiliary contacts and coil connections, which are manufactured separately and then assembled with the basic module. This segmentation reduces part variance by standardizing the basic module while allowing the auxiliary module to be customized, and maintains reliability through proper assembly connections between the two modules.
Data Source
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AI summary
The invention relates to a low-voltage switching device with a base module (1), which has a connection region (8, 6a) for electric conductors. The invention is characterized in that auxiliary contacts and a coil connection are arranged in a separate auxiliary module (9) in a separable manner from the base module (1).