Distribution Panel Arc Duct Relief Device
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Solution Overview
Problem
Distribution panels face challenges in miniaturization due to the need for a wide arc duct to effectively discharge arcs generated in the main busbar compartment, which increases the overall size of the equipment.
Innovation Solution
A rotatable relief device with multiple stages is integrated into the distribution panel, featuring a communication hole and covers that can open and close to facilitate arc discharge, reducing the required width of the arc duct by allowing the covers to bend and rotate, thus minimizing the panel's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wide arc duct is provided to effectively discharge arcs, then arc discharge effectiveness is improved, but the overall size of the distribution panel increases
Solution Approach 1:
The relief device is designed to be rotatable, transitioning from a closed state during normal operation to an opened state during arc discharge. This dynamic mechanism allows the arc duct to effectively expand its discharge capacity when needed while maintaining a compact form when not in use, resolving the contradiction between arc discharge effectiveness and panel size
Solution Approach 2:
The relief device is divided into multiple segments (first relief device and second relief device) that can rotate independently. This segmentation allows the system to achieve a larger effective discharge area through rotational movement of multiple smaller components rather than requiring a single large static duct, thus reducing the overall panel footprint while maintaining arc discharge effectiveness
2Reliability
If the relief device is opened toward the arc duct, then arc discharge is facilitated, but the front and rear width of the arc duct must be increased
Solution Approach 1:
Instead of opening the relief device in a straight line toward the arc duct (one-dimensional movement), the device rotates along a hinge axis, utilizing rotational motion in multiple dimensions. This allows the discharge path to effectively extend in a curved trajectory, achieving sufficient discharge capability without increasing the linear front-to-rear width of the arc duct
3Volume of moving object
If the relief device is rotatably provided in multi stages, then the arc duct width is reduced, but the device complexity increases
Solution Approach 1:
The multi-stage rotatable relief devices are arranged in a nested configuration where the first relief device and second relief device are positioned sequentially along the arc duct. This nesting approach allows the complex multi-stage mechanism to be compacted into a smaller space, reducing the overall panel size while containing the structural complexity within a manageable footprint
Data Source
AI summary
Provided is a distribution panel. The distribution panel includes a main busbar compartment in which a main busbar is provided and which is provided as an independent space and an arc duct provided at a rear side of the main busbar compartment to discharge an arc generated in the main busbar compartment. The main busbar compartment includes a communication hole defied in one surface of the main busbar to allow the main busbar compartment to communicate with the arc duct and a relief device rotatably provided on one side of the communication hole to open or close the communication hole. The relief device is bendable in multi stages. Thus, the arc may be effectively discharged while reducing a size of the distribution panel.