Surge Arrester Conductor Assembly With Insulating Support
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Solution Overview
Problem
Surge arresters, when unsupported, deform due to their weight, leading to potential damage during transport and reduced lifespan, and breaking the electrical connection for testing shortens their life.
Innovation Solution
A conductor assembly with a surge arrester that includes an insulating support between the arrester and conductor, allowing indirect support in both operating and test states, and a moveable conductor connection for switching between states, with features like flexible rings and conductive elements to mitigate mechanical stress and partial discharges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical connection from the electrical conductor to the surge arrester is broken to perform high-voltage testing, then testing can be performed, but the surge arrester cannot be supported by the electrical conductor and its life is shortened
Solution Approach 1:
An electrically insulating support is introduced as an intermediary element between the electrical conductor and the surge arrester. This support provides mechanical support to the surge arrester while being electrically insulating, allowing the electrical connection to be broken for testing purposes without compromising the support structure. The support acts as a mediator that decouples the mechanical support function from the electrical connection function.
2Reliability
If the electrical connection is broken for testing, then high-voltage testing can be performed, but the surge arrester deforms due to its own weight
Solution Approach 1:
The electrically insulating support serves as a mediator that maintains the structural integrity of the surge arrester by providing continuous mechanical support, even when the electrical connection is broken for high-voltage testing. This eliminates the need to compromise structural support to enable testing.
3Reliability
If a permanent electrical connection is used, then the surge arrester is continuously supported, but the connection cannot be broken for high-voltage testing
Solution Approach 1:
The electrically insulating support decouples the mechanical support function from the electrical connection function. This allows the system to maintain continuous mechanical support while enabling the electrical connection to be broken or switched for high-voltage testing, thereby providing both support reliability and testing flexibility.
Solution Approach 2:
The system is segmented into separate functional elements: the electrically insulating support handles mechanical support, while the electrical connection (which may be switchable or breakable) handles electrical connectivity. This segmentation allows each element to perform its specific function independently, enabling testing flexibility without compromising support reliability.
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
Prevents damage during transport and extends the surge arrester's life by supporting it indirectly, while enabling testing without compromising its functionality.
Implementation Method 1
the flexible ring arranged in it, the axis of rotation of which is substantially parallel to the longitudinal direction. This allows lateral forces, which have a component perpendicular to the longitudinal direction, to be cushioned
Implementation Method 2
This allows thermal expansions, for example in the conductor, in the support and/or in the surge arrester, to be compensated for by virtue of the gap becoming narrower in the longitudinal direction
Data Source
AI summary
A conductor assembly includes an electrical conductor, a surge arrester which has a longitudinal direction, an operating state in which the surge arrester is configured to limit an overvoltage occurring in the electrical conductor, and a test state in which the surge arrester is not configured to limit the overvoltage. An electrically insulating support is disposed between the surge arrester and the electrical conductor in the longitudinal direction. The support is supported by the electrical conductor, and the surge arrester is supported by the support.