Switchgear Measuring Module for Terminal Fault Temperature Detection
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Solution Overview
Problem
Existing technologies fail to provide continuous monitoring of terminal connections in switching devices and load-break switches, leading to a high risk of fires due to faulty connections, which are often not detected by protective devices like fuses or circuit breakers.
Innovation Solution
A measuring module for switching devices, specifically designed for load-break switches, which continuously monitors the temperature of terminal connections using temperature sensors embedded in thermally conductive and electrically insulating materials. The module detects temperature increases and issues error messages if the rise exceeds a specified limit or shows a critical temporal progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared thermography is used to detect hazardous areas in electrical connections, then early detection of temperature irregularities is possible, but the method fails when terminal connections are in inaccessible locations or when current is too low to generate detectable heat
Solution Approach 1:
The patent extracts the temperature sensing function from external inspection methods and embeds it directly into the terminal connection structure itself through contact pieces with integrated temperature sensors. This allows temperature monitoring at the exact location of electrical connections without requiring external access or line-of-sight for infrared cameras.
Solution Approach 2:
The patent introduces contact pieces as intermediary elements that serve dual purposes: establishing electrical contact and housing temperature sensors. These intermediaries bridge the gap between the electrical connection point and the monitoring system, enabling continuous temperature measurement even in previously inaccessible locations.
2Reliability
If visual inspection is used to detect terminal connection issues, then gradual increases in resistance can be detected through discoloration or deformation, but the method is time-consuming and expensive
Solution Approach 1:
The patent implements continuous temperature monitoring through permanently installed contact pieces with integrated sensors, replacing periodic visual inspections. The system continuously measures temperature at electrical connections, providing ongoing surveillance without requiring manual intervention, thus eliminating time loss while maintaining high reliability through real-time detection.
Solution Approach 2:
The monitoring system is self-sufficient, with temperature sensors automatically detecting and reporting connection issues without requiring human inspectors. The system serves itself by continuously monitoring its own operational parameters and generating alerts when anomalies are detected, eliminating the need for external inspection resources.
3Reliability
If protective devices like fuses or circuit breakers are used, then electrical overcurrent is protected, but faulty terminal connections with increased contact resistance are not detected
Solution Approach 1:
The patent implements a feedback mechanism where temperature sensors continuously monitor the thermal state of electrical connections and provide real-time information about connection quality. When temperature exceeds thresholds indicating increased contact resistance, the system generates error messages or alerts, enabling proactive detection and correction of faulty connections before they cause hazards, thus complementing traditional overcurrent protection.
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 measuring module effectively detects and reports faulty contacts in terminal connections, preventing fires by continuously monitoring temperature changes and providing timely error messages, thus enhancing safety and reducing the risk of damage.
Implementation Method 1
at least one contact piece (3), preferably a plurality of contact pieces, particularly preferably three contact pieces, for at least thermally contacting at least one switch terminal of the switching device
Implementation Method 2
embedded in thermally conductive and electrically insulating materials
Implementation Method 3
embedded in thermally conductive and electrically insulating materials
Data Source
Figure 1
Figure 2~3
AI summary
Measuring module (1) for a switching device, in particular for a load break switch (2), wherein the measuring module (1) has at least one contact piece (3), preferably several contact pieces (3), particularly preferably three contact pieces (3), for at least thermal contacting at least one switch terminal (4, 5) of the switching device (2), the measuring module (1) further comprising at least one temperature sensor (6) for determining the temperature of the at least one contact piece (3), wherein the measuring module (1) is configured to monitor the temperature of the at least one contact piece (3) and to output an error message if a temperature increase of the at least one contact piece (3) is detected that is greater than or greater than an increase limit value or exhibits a predefined behavior.