Strain Release Connector for Overhead Electrical Wire
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Solution Overview
Problem
Downed power lines pose a significant safety risk due to the potential for electric shock and damage from fallen wires, which can result from increased wire tension caused by storms, accidents, or other factors, and existing technologies lack a reliable mechanism for controlled breakage to prevent these hazards.
Innovation Solution
A strain release connector system for overhead electrical wires that includes a first connector part securely clamping the wire with a fixed force and a second part with adjustable strain screws, allowing the service cable to release when a predetermined tension force is applied, ensuring the wire remains energized and intact while the de-energized cable falls to the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed clamping force connector is used to securely hold the overhead electrical wire, then the wire remains stable and secure, but the connector cannot release the wire when excessive tension occurs
Solution Approach 1:
The connector transitions from a static fixed clamping force design to a dynamic system where the second connector part can adjust its clamping force based on tension levels. The strain adjustment screws allow the connector to maintain secure holding under normal conditions while automatically releasing when excessive tension occurs, resolving the contradiction between reliability and adaptability.
2Reliability
If the clamping force on the service cable is increased to prevent release, then the connection remains secure, but the cable cannot be released when predetermined tension force is applied
Solution Approach 1:
The connector uses strain adjustment screws to precisely control the clamping force parameter on the service cable. By adjusting this parameter to a specific value below the fixed clamping force of the first connector part, the system ensures secure connection during normal operation while enabling automatic release when the predetermined tension force is exceeded, thus resolving the contradiction between connection security and controlled release capability.
3Ease of manufacture
If conventional crimping is used in crowded areas, then installation is simple, but the number of services per takeoff location is limited
Solution Approach 1:
The connector assembly serves multiple functions: it provides secure electrical connection, enables controlled release under excessive tension, and accommodates multiple service cables through the second connector part with multiple strain adjustment screws. This multi-functional design allows a single takeoff location to serve multiple services while maintaining installation simplicity, resolving the contradiction between ease of manufacture and adaptability.
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 strain release connector effectively reduces the risk of downed power lines by ensuring the wire remains energized and secure, minimizing pole breakage, and accommodating multiple service connections, thereby enhancing safety and reducing hazards from downed wires.
Implementation Method 1
a second connector part cooperable with the first connector part and securable to a service cable with an adjustable clamping force
Implementation Method 2
The adjustable clamping force is set by the at least one strain adjustment screw such that the second connector part is configured to release the service cable upon an application of a predetermined tension force
Implementation Method 3
the second connector part is configured to release the service cable upon an application of a predetermined tension force
Data Source
AI summary
A strain release connector for an overhead electrical wire includes a first connector part securable to the overhead electrical wire with a fixed clamping force, and a second connector part cooperable with the first connector part and securable to a service cable with an adjustable clamping force, less than the fixed clamping force. The second connector part has at least one strain adjustment screw for modifying the adjustable clamping force. The adjustable clamping force is set by the at least one strain adjustment screw such that the second connector part is configured to release the service cable upon an application of a predetermined tension force.