Lapless Main Circuit Connector Structure for Compact Switchgear
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Solution Overview
Problem
Existing low-voltage switchgear main circuit connection structures have issues with large connection distances, complex installation processes, high copper consumption, and labor-intensive maintenance, which hinder miniaturization and efficient maintenance without power interruption.
Innovation Solution
A lapless main circuit connection structure using dual-socket main circuit connectors with conductive plugs and circuit breaker connector bars that eliminate terminal bars, allowing direct plug-in connections and reducing connection distances and copper consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal bars are used in main circuit connectors, then connection reliability is improved, but connection distance and copper consumption increase
Solution Approach 1:
The patent extracts and removes the terminal bar component from the main circuit connector. By eliminating the terminal bar, the connection structure is simplified, connection distance is reduced, and copper consumption is decreased while maintaining connection reliability through direct connector-to-conductor contact.
Solution Approach 2:
The patent segments the connection system into modular components with standardized interfaces. The main circuit connector is designed as a separate module that interfaces directly with circuit breaker connector bars, eliminating the need for terminal bars and reducing overall connection distance.
2Reliability
If complex main circuit connection structures are used, then connection reliability is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent merges the functions of multiple components into a single integrated main circuit connector. The connector integrates contact elements, insulation, and mounting features, eliminating the need for separate terminal bars and reducing structural complexity while maintaining reliable connections.
Solution Approach 2:
The patent designs a universal main circuit connector that can accommodate different circuit breaker types and configurations through standardized interfaces. This multi-functional connector reduces device complexity by providing a single solution that works across various applications.
3Ease of manufacture
If standardized connector designs are used, then manufacturing efficiency is improved, but adaptability to different circuit breaker models decreases
Solution Approach 1:
The patent applies local quality by maintaining standardized body dimensions for manufacturing efficiency while providing adjustable or configurable connection interfaces that adapt to different circuit breaker models. The connector body is standardized, but connection points can be adjusted to accommodate varying phase-to-phase center distances.
Solution Approach 2:
The patent incorporates dynamic elements in the connector design, such as adjustable mounting positions or flexible connection interfaces, that allow the standardized connector to adapt to different circuit breaker configurations while maintaining manufacturing efficiency through modular components.
Data Source
AI summary
The present invention relates to a lapless main circuit connection structure and a unit assembly. The lapless main circuit connection structure includes circuit breaker connector bars and main circuit connectors, and the circuit breaker connector bars are directly inserted into the main circuit connectors and are connected to plug front sockets of conductive plugs in a plug-in manner. The unit assembly includes a unit and a unit chamber, a circuit breaker is installed in the unit, and the circuit breaker is connected to a main circuit through the lapless main circuit connection structure. The beneficial effects are that: the main circuit connectors in the present solution are double-socket structures and are not provided with terminal bars, the number of lap points is reduced, and the connection distance H and the copper consumption for copper bars connected to the main circuit are reduced. In a unit adopting the lapless main circuit connection structure, the unit depth L can be further reduced, thus achieving the miniaturization of the unit. A switchgear is miniaturized, and the application of the device reduces the infrastructure cost. For application design for the current levels of various types of circuit breakers, a permanent design finalization structure can be formed by design only once, and the standardization degree of the main circuit connection structure is greatly improved.