Movable Distribution Board Neutral Terminal Layout for Leakage Limiting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Movable distribution boards lack effective leakage current limiting functions, increasing the risk of electric shock when used in various environments, such as flooded conditions, due to insufficient area ratio differences between conductor electrodes.
Innovation Solution
Incorporating circuit breakers, terminal blocks, and electrical outlets with neutral line terminal area expansion units that increase the contact area with neutral line terminals, reducing leakage currents by redirecting them through expanded areas, thereby minimizing the risk of electric shock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distribution board is made movable for versatile use in various places, then adaptability is improved, but leakage current protection deteriorates due to insufficient area ratio differences between conductor electrodes
Solution Approach 1:
The patent applies local quality by expanding the neutral line terminal area specifically at critical locations where leakage current occurs. The expansion is not uniform across the entire distribution board but is localized to the neutral line input and output terminals, creating different area ratios at specific points to redirect leakage current safely.
Solution Approach 2:
The patent changes the physical parameter of the neutral line terminal area by providing expansion units that increase the contact area. This parameter change (area expansion) directly addresses the leakage current issue by creating a sufficient area ratio difference between phase and neutral line terminals, thereby redirecting leakage current through the expanded neutral line terminals.
2Reliability
If neutral line terminal area expansion units are added to limit leakage current, then safety is improved, but device complexity increases
Solution Approach 1:
The patent merges the neutral line terminal with the expansion unit into an integrated structure. The expansion unit is electrically connected to and forms part of the neutral line terminal, combining the functions of current conduction and area expansion into a single integrated component, thereby reducing overall device complexity.
Solution Approach 2:
The expansion unit acts as an intermediary element between the neutral line input terminal and the neutral line output terminal. It provides the necessary area expansion while maintaining electrical continuity, serving as a mediating structure that simplifies the overall design compared to separate expansion components.
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
The solution effectively limits leakage currents and minimizes the risk of electric shock by expanding the neutral line terminal areas, aligning with the principle that increased conductor area ratios decrease leakage currents, as previously established in Korean Patent Registration No. 10-1625493, ensuring safer operation in diverse environments.
Implementation Method 1
a neutral line input terminal area expansion unit (131) that is in electrical contact with a neutral line input terminal (133) on an input side of the circuit breaker (130) to expand an area of the neutral line input terminal (133) on the input side of the circuit breaker (130) so as to limit a leakage current on the input side of the circuit breaker (130)
Data Source
AI summary
The present disclosure relates to a movable distribution board having a leakage current limiting function, in which the movable distribution board is implemented in a mobile manner so that the movable distribution board may be used in various places, the circuit breaker, the terminal block, and the electrical outlet having a leakage current limiting function are provided therein to limit a current leaking from the distribution board when the movable distribution board is used in the field, and thus, the risk of electric shock to the human body due to the leakage current can be minimized.