Coupling Surge Arrester Trip Unit for Explosion Prevention
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Solution Overview
Problem
Conventional surge arresters in power transmission systems can malfunction due to factors like aging and moisture, leading to cracking and explosion, posing safety risks to equipment and personnel.
Innovation Solution
A coupling surge arrester with a trip unit that includes conductors and a conductive member, where a sliding mechanism breaks the circuit when the arrester module malfunctions, preventing current flow and potential explosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surge arresters are used to protect equipment from overvoltage, then equipment safety is improved, but the risk of arrester explosion and cracking increases due to malfunction
Solution Approach 1:
The surge arrester is divided into modular components including a first conductor, second conductor, conductive member, and insulating member. This segmentation allows the circuit to be interrupted at specific points when malfunction occurs, preventing catastrophic failure and explosion of the entire arrester unit.
Solution Approach 2:
The insulating member acts as an intermediary element between the first and second conductors. It normally maintains electrical connection through the conductive member but can be pushed to break the circuit when abnormal conditions occur, serving as a safety mediator that prevents explosion.
2Reliability
If the circuit remains continuously connected to maintain surge protection function, then protection reliability is improved, but temperature rise and explosion risk increase due to continuous current flow through malfunctioning arrester
Solution Approach 1:
The system incorporates a feedback mechanism where the insulating member responds to temperature rise and current abnormalities by automatically breaking the circuit. This feedback loop detects malfunction conditions and triggers circuit interruption to prevent further temperature increase and potential explosion.
Solution Approach 2:
The circuit connection is made dynamic rather than static. The insulating member can transition from a connected state (maintaining surge protection) to a disconnected state (preventing overheating) based on operating conditions, allowing the system to adapt and prevent thermal runaway.
3Duration of action of stationary object
If the arrester module is designed for continuous operation to ensure constant protection, then protection duration is improved, but safety risk increases due to aging and moisture accumulation over time
Solution Approach 1:
The insulating member is pre-positioned to break the circuit when pushed by thermal expansion or other malfunction indicators. This preliminary arrangement ensures that when aging or moisture causes malfunction, the circuit automatically interrupts before catastrophic failure occurs, extending safe operation duration.
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 arrester explosion and cracking by interrupting current flow, enhancing safety and protecting surrounding equipment.
Implementation Method 1
The conductive member is disposed in the closed chamber. Two ends of the conductive member are in contact with the first contact surface and the second contact surface, respectively, so that the first conductor and the second conductor are electrically connected through the conductive member.
Implementation Method 2
The insulating member is disposed between the first conductor and the second conductor so that the first conductor and the second conductor do not come into contact with each other.
Implementation Method 3
The second conductor is slidable relative to the first conductor. One end of the second conductor has a second connecting portion. The second connecting portion is electrically connected to the arrester module. Another end of the second conductor has a second contact surface.
Data Source
AI summary
A coupling surge arrester has a body. The body includes an arrester module and a trip unit at the front end of the arrester module. The trip unit includes a first conductor, a second conductor slidable relative to the first conductor, and at least one conductive member. A closed chamber is enclosed between the first conductor and the second conductor. The conductive member is disposed in the closed chamber. When the arrester module malfunctions, the continuously passing current will cause the temperature of the conductive member to rise sharply, and the air inside the closed chamber will expand rapidly after being heated, such that the second conductor is pushed to slide relative to the first conductor to occur a circuit break, thereby preventing the arrester module from exploding and cracking.