Withdrawable Auxiliary Compartment for Switchgear Maintenance
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Solution Overview
Problem
In low voltage switchgear systems, maintenance personnel face challenges accessing and maintaining breaker control instrumentation without being exposed to energized circuits, as these devices are often housed in the same compartment as the circuit breaker, requiring the system to be de-energized for safety.
Innovation Solution
A withdrawable auxiliary compartment is designed to house electrical devices such as breaker control instruments, featuring connectors for power and communication connections that can be disconnected from the circuit breaker compartment, allowing the compartment to be safely removed for maintenance, providing access to the devices without exposing personnel to energized components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If breaker control instrumentation is mounted in the same compartment as the circuit breaker, then device integration is improved, but maintenance safety deteriorates due to exposure to energized circuits
Solution Approach 1:
The patent divides the switchgear into separate functional compartments: the circuit breaker compartment remains energized while the auxiliary compartment housing control instrumentation can be independently accessed and removed. This segmentation allows maintenance personnel to work on control devices without exposure to energized circuits, resolving the safety contradiction while maintaining system integration.
Solution Approach 2:
The auxiliary compartment containing control instrumentation is designed to be extractable from the main switchgear enclosure. This extraction capability allows the control devices to be physically removed for maintenance while the circuit breaker remains in place and energized, eliminating the need to de-energize the entire system and resolving the safety hazard.
2Object-affected harmful factors
If the circuit breaker is de-energized for maintenance of control instrumentation, then personnel safety is improved, but operational productivity deteriorates
Solution Approach 1:
By segmenting the switchgear into independent compartments with separate access, the patent enables maintenance of control instrumentation without de-energizing the circuit breaker. The auxiliary compartment can be opened and instruments maintained while the main breaker remains operational, thus maintaining productivity while ensuring safety.
Solution Approach 2:
The extractable auxiliary compartment design allows control devices to be removed and maintained externally while the circuit breaker stays energized and operational. This extraction approach eliminates the need to shut down the entire system for routine maintenance, preserving productivity while improving personnel safety.
3Area of moving object
If breaker control instrumentation is housed in the same compartment as the circuit breaker, then device integration is improved, but maintenance accessibility deteriorates
Solution Approach 1:
The patent creates a separate, accessible auxiliary compartment for control instrumentation that is physically distinct from the circuit breaker compartment. This segmentation provides dedicated access paths and workspace for maintenance personnel working on control devices, improving accessibility while maintaining overall system integration through the connected compartment design.
Solution Approach 2:
The auxiliary compartment is designed to be fully extractable from the main enclosure, providing excellent maintenance accessibility. Control instrumentation can be completely removed for external maintenance or testing, offering superior access compared to working within the confined space of an integrated compartment, while still maintaining system integration when installed.
Data Source
AI summary
An auxiliary compartment for housing at least one electrical device is associated with an auxiliary cubicle of a switchgear enclosure. The auxiliary compartment is removably mounted in the corresponding auxiliary cubicle for quick disconnection of the electrical device from an associated circuit breaker in an adjacent circuit breaker cubicle. The auxiliary compartment includes a first connection connected to the electrical device. The auxiliary cubicle includes a second connector attached to the auxiliary compartment rear wall that is removably engageable with the first connector. The second connector is connected with the circuit breaker in the adjacent circuit breaker cubicle. The electrical device in the auxiliary compartment can be quickly disconnected from the power and communication connections with the circuit breaker in the adjacent circuit breaker cubicle by withdrawing the auxiliary compartment from the auxiliary cubicle to disconnect the first and second connectors.