Distribution Board Isolation Mechanism Prevents Accidental Re-energization
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Solution Overview
Problem
Existing electrical distribution boards pose a risk of electrocution due to the potential premature re-energization of circuits, either by accidental operation of isolation or circuit breaker switches, especially when workers incorrectly assume that work on outgoing circuits has been completed.
Innovation Solution
An electrical distribution board with a movable isolation mechanism that can only be switched from isolation to connection mode after being disengaged from its housing, ensuring that the mechanism must be manually and intentionally moved between positions, reducing the risk of accidental re-energization by requiring deliberate disengagement before operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the isolation mechanism is made movable between isolated and connected positions, then the ease of operation is improved, but the risk of accidental re-energization increases
Solution Approach 1:
The isolation mechanism requires preliminary disengagement from the housing before it can be moved to the connected position. This preliminary action ensures that accidental operation is prevented while still allowing intentional operation when needed.
Solution Approach 2:
The isolation mechanism transitions from a static locked position to a movable state through disengagement from the housing. This dynamic behavior allows the mechanism to adapt between safe locked state and operational movable state, resolving the contradiction between ease of operation and safety.
2Reliability
If the isolation mechanism is locked in the housing, then the safety is improved, but the ease of operation deteriorates
Solution Approach 1:
Before the isolation mechanism can be operated, it must first be disengaged from the housing through a preliminary action. This ensures safety through locked positioning while still allowing operation when properly prepared.
Solution Approach 2:
The housing acts as an intermediary between the isolation mechanism and the electrical circuit. The housing provides the locked safe state, and its disengagement enables operation, mediating between safety and ease of operation.
3Reliability
If additional locking components are added to prevent accidental operation, then the safety is improved, but the device complexity increases
Solution Approach 1:
The locking function is merged with the housing structure itself rather than being a separate component. The housing provides both structural support and the locking/disengagement mechanism, reducing overall device complexity while maintaining safety.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, electrical insulation, and the locking/disengagement mechanism for the isolation mechanism. This multi-functionality eliminates the need for separate locking components.
Data Source
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AI summary
The present invention relates to an electrical distribution board. The electrical distribution board comprises at least one incoming conductor terminal, at least one outgoing conductor terminal, at least one longitudinal bus conductor connected to the at least one incoming conductor terminal, at least one lateral conductor tab connected to the at least one bus conductor for distributing electrical power from the at least one bus conductor to the at least one outgoing conductor terminal, and at least one isolation mechanism for electrically isolating the at least one outgoing conductor terminal from the at least one lateral conductor tab. The at least one isolation mechanism is moveable between a first position in which the at least one outgoing conductor terminal is electrically isolated from the at least one lateral conductor tab and a second position in which the at least one outgoing conductor terminal is electrically connected to the at least one lateral conductor tab. The at least one isolation mechanism is configured to be engageable with a housing of the electrical distribution board when the at least one isolation mechanism is in the first position, such that movement of the at least one isolation mechanism from the first position to the second position is only possible once the at least one isolation mechanism has been disengaged from the housing of the electrical distribution board.