Resilient Spring Safety Cover for Terminal Block Connections
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Solution Overview
Problem
In electrical power distribution equipment, terminal blocks pose a risk of inadvertent disconnection due to poorly marked and unprotected wire connections, leading to potential catastrophic power failures in interconnected grids.
Innovation Solution
A safety cover and identifier device with a resilient spring mechanism and serrated jaws is designed to securely cover wire connections and provide identification markings, preventing accidental disconnection and indicating which connections should be avoided.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal blocks are used to connect wires in substations, then wiring management is simplified and safety against shorts is improved, but the risk of inadvertent disconnection increases due to poor marking and lack of protection
Solution Approach 1:
The patent applies preliminary action by placing protective covers over wire connections before any disconnection can occur. The covers are pre-installed on terminal blocks, creating a physical barrier that prevents inadvertent contact with wire connectors. This advance protective measure eliminates the need for reactive safety measures after disconnection occurs.
Solution Approach 2:
The protective cover acts as an intermediary element between the wire connections and potential sources of inadvertent disconnection. The cover includes identification markings that communicate connection information to technicians without requiring direct exposure to the wire connectors themselves, thus mediating the interaction and reducing risk.
2Productivity
If wire connections are left exposed for easy access, then operational speed is improved, but the risk of contact with persons or foreign conducting materials increases
Solution Approach 1:
The patent applies local quality by providing selective coverage of wire connections. The protective covers are applied only to specific terminal blocks or specific connections within a terminal block, allowing technicians to access uncovered connections quickly while protected connections remain safeguarded. This localized approach balances speed and safety based on the specific risk profile of each connection.
3Loss of information
If identification markings are added to wire connections, then the ability to identify critical connections is improved, but the complexity of the terminal block system increases
Solution Approach 1:
The patent merges the identification function with the protective cover structure. Rather than adding separate identification labels or tags to the terminal block system, the identification markings are integrated directly onto the protective covers themselves. This combination eliminates the need for additional identification components while providing both protection and information.
4Reliability
If protective covers are installed over wire connections, then inadvertent disconnection is prevented, but the ease of legitimate maintenance work may be reduced
Solution Approach 1:
The patent applies dynamics by making the protective covers removable and repositionable rather than permanent. The covers can be easily removed when legitimate maintenance is required and reinstalled afterward. This dynamic approach allows the system to transition between protected and accessible states based on operational needs, balancing safety with maintenance requirements.
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 device effectively prevents inadvertent disconnection of wires, reduces the risk of power failures, and enhances safety by clearly marking critical connections, thereby minimizing the risk of cascading outages in electrical substation environments.
Implementation Method 1
The resilient spring element biases the jaws toward each other to secure the cover in place
Implementation Method 2
The jaws are opened by compression of the distal ends of the legs. The jaws are attached to the electrical terminal block to cover wire connections
Data Source
AI summary
A safety cover and identifier to cover wire terminals in an electric terminal block. The cover/identifier comprises a body comprising dielectric material having a first leg and an opposed, spaced apart second leg The two legs are joined adjacent their midpoints by an integral, resilient spring element. The opposed proximal ends of the legs each have a terminal covering surface and define serrated jaws. The jaws are opened by compression of the distal ends of the legs. The jaws are attached to the electrical terminal block to cover wire connections and each of the proximal ends covers one of a functional pair of wire connectors. The resilient spring element biases the jaws toward each other to secure the cover in place. The device can include stops or a stop gap in the spring to delimit opening of the jaws. The cover/identifier includes indicia to identify aspects of the wires attached to the cover wire connectors.