Surge Protector Switch Disconnect Modules
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Solution Overview
Problem
Existing surge protection devices (SPDs) in electrical panelboards face challenges such as inoperability after extreme over-voltage events, requiring replacement and maintenance that disrupts electrical systems, and are cumbersome to service, especially when feed-through lugs are occupied, necessitating de-energization of the panel.
Innovation Solution
The development of SPD modules and switch bases that allow plug-in installation and removal without de-energizing the panel, featuring a switch mechanism to disconnect SPDs from an energized panel, enabling safe and easy maintenance, and incorporating local and remote state detection to facilitate quick inspection and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SPDs are installed in electrical panelboards with occupied feed-through lugs, then surge protection is provided, but servicing the SPDs requires de-energizing the panel which causes system downtime
Solution Approach 1:
The SPD system is divided into modular components: the SPD module itself and the switch base with integrated circuit breaker. This segmentation allows the SPD to be serviced independently without affecting the entire panel, enabling hot-swapping capability that eliminates downtime during maintenance while maintaining surge protection.
Solution Approach 2:
An integrated switch mechanism acts as an intermediary between the SPD module and the electrical panel. This switch mechanism includes a movable carriage with contacts that can disconnect the SPD from the energized panel, allowing safe removal and installation of SPD modules without de-energizing the panel, thus resolving the contradiction between maintaining protection and enabling maintenance.
2Reliability
If SPDs are installed in electrical panelboards, then surge protection is provided, but extreme over-voltage events render SPDs inoperable requiring replacement that disrupts electrical systems
Solution Approach 1:
The SPD system is divided into modular components: the SPD module itself and the switch base with integrated circuit breaker. This segmentation allows the SPD to be serviced independently without affecting the entire panel, enabling hot-swapping capability that eliminates downtime during maintenance while maintaining surge protection.
Solution Approach 2:
The switch mechanism is pre-configured with a movable carriage and interlocking elements that automatically disconnect the SPD from the energized panel before removal. This preliminary action of automatic disconnection simplifies the replacement process, allowing technicians to swap SPD modules without complex manual disconnection procedures or system shutdowns.
3Ease of operation
If a switch mechanism is added to enable disconnecting SPDs from energized panels, then ease of maintenance is improved, but device complexity increases
Solution Approach 1:
The switch mechanism is merged with the circuit breaker housing to form an integrated switch base. The movable carriage, contacts, and interlocking elements are combined into a single unified structure that performs both switching and mechanical retention functions, reducing overall device complexity while maintaining ease of maintenance.
Solution Approach 2:
The movable carriage serves multiple functions: it acts as a switch contact carrier, a mechanical retention element through interlocking features, and a disconnection mechanism. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while enabling easy SPD replacement from energized panels.
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
This solution allows for safe and convenient servicing of SPDs without de-energizing the panel, simplifying maintenance and reducing downtime, while ensuring user safety and efficiency in installations with occupied feed-through lugs.
Implementation Method 1
In use, SPDs normally exhibit a high impedance, but when an over-voltage event occurs, the devices switch to a low impendence state so as to shunt or divert overvoltage-induced current to electrical ground.
Data Source
AI summary
Surge protection modules and switch bases separately provided from the surge protection modules facilitate plug-in installation and removal of the surge protection modules as well as disconnect switching capability to facilitate maintenance and service events in an electrical power system without de-energizing circuitry connected to the switch bases.