Electrical Panel Interlock Mechanism for Multi-Source Isolation
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Solution Overview
Problem
Current interlock arrangements only allow for interlocking two independent power sources, failing to accommodate multiple power sources such as utility, generator, and photovoltaic systems, which can lead to unsafe conditions when multiple power sources are connected concurrently.
Innovation Solution
An interlock assembly with a mechanism that prevents concurrent engagement of multiple power sources, including a main switch and alternate switches, using a movable front plate with locking features to secure the position of switches and prevent unauthorized movement, allowing for interlocking of more than two power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current interlock arrangements are used, then two independent power sources can be interlocked, but multiple power sources (utility, generator, photovoltaic) cannot be accommodated
Solution Approach 1:
The interlock mechanism is divided into multiple independent toggle switches (main toggle, first alternate toggle, second alternate toggle) that can be individually controlled. Each toggle operates as a separate segment, allowing multiple power sources to be interlocked independently while maintaining overall system coordination through the shared interlock housing and mounting structure.
2Reliability
If manual switch configuration is required, then users can control power source connections, but electrical isolation cannot be guaranteed due to human error
Solution Approach 1:
The interlock mechanism is pre-configured with mechanical linkages and shared mounting structures that enforce proper sequencing of switch operations. Before any power source can be connected, the interlock mechanism must be in the correct preliminary position, which automatically prevents concurrent connection of multiple power sources and eliminates reliance on user memory or procedure-following.
3Adaptability or versatility
If multiple power sources are allowed to connect concurrently, then system flexibility increases, but safety hazards and damage risks increase
Solution Approach 1:
The interlock mechanism serves as an intermediary device between multiple power sources and the electrical panel. It mediates the connection process by using shared mounting structures and mechanical linkages to ensure that only one power source can be connected at a time, thereby preventing the harmful effect of concurrent connections while still allowing flexible configuration of different power sources.
Data Source
AI summary
The present disclosure describes an interlock assembly adapted to interact with a plurality of circuits, switches and/or toggles to direct a desired flow of energy. The interlock assembly includes an electrical panel assembly including a cover and a series of electrical circuits including a main switch and at least one alternate switch; and an interlock mechanism movably connected to the electrical panel assembly. The interlock mechanism is configured to prevent the main switch and the at least one alternate switch from being concurrently engaged based on the desired flow of energy. The interlock mechanism includes a locking feature configured to prevent unauthorized movement of the interlock mechanism relative to the electrical panel assembly.