Switch Blade Position Sensing to Prevent Incomplete Closure Overheating
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Solution Overview
Problem
High-voltage electrical switches, such as air break switches, experience high resistance and potential failure when not fully closed due to incomplete contact positions, leading to overheating.
Innovation Solution
Incorporating a pivotable blade with a sensor that senses its position and outputs a signal, allowing for a system to monitor and ensure the blade is fully closed, thereby preventing overheating and failure, which includes a collector to receive and analyze these signals for operational feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blade is not fully closed, then the switch structure allows operational flexibility, but high resistance occurs leading to overheating and potential failure
Solution Approach 1:
The sensor detects the blade position in advance and generates a signal before the blade reaches the fully closed position. This preliminary detection allows the system to identify incomplete closure and prevent the high resistance condition that would lead to overheating, thereby maintaining reliability while avoiding temperature problems.
Solution Approach 2:
The sensor provides feedback about the blade position to the system. This feedback mechanism enables continuous monitoring of the blade closure state, allowing the system to detect when the blade is not fully closed and take appropriate action to prevent overheating and failure, thus resolving the contradiction between reliability and temperature control.
2Reliability
If a sensor is added to detect blade position, then blade position can be monitored to prevent overheating, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical position indication mechanisms with a sensor-based detection system. The sensor electronically detects the blade position and generates signals, substituting what would traditionally require complex mechanical linkages, levers, or visual indicators, thereby achieving reliable position monitoring with reduced mechanical complexity.
Solution Approach 2:
The invention changes the detection parameter from mechanical position indication to electrical signal generation. By using a sensor that converts physical blade position into an electrical signal, the system achieves position monitoring without the complexity of mechanical indication systems, maintaining reliability while reducing structural complexity.
Data Source
AI summary
A switch including a blade, an electrical terminal, and a sensor. The blade is pivotable between an open position and a closed position. The electrical terminal is configured to receive the blade when in the closed blade position. The sensor is coupled to the electrical terminal. The sensor is configured to sense a position of the blade and output a signal corresponding to the position.