Switchgear Motion Timing Monitoring via Impact and Power Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing switchgear monitoring systems cannot accurately measure the time taken by the electromagnetic actuator to initiate the switching mechanism's motion, which is crucial for maintaining switchgear operation and preventing potential faults.
Innovation Solution
A method that monitors electric power supply signals, impact intensity, and the open/closed state of the switchgear to calculate precise times for the actuator's start and the switching mechanism's motion, with optional comparison to predetermined thresholds for diagnostics, using sensors and a signal acquisition and calculating unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If auxiliary contacts and sensors are used to detect switching mechanism position and movement, then the basic switching state can be monitored, but the time needed for the electromagnetic actuator to initiate the switching mechanism cannot be measured
Solution Approach 1:
The patent introduces an intermediary sensor system that detects physical quantities (vibration, acceleration, position) generated during the switching process. These intermediaries serve as mediators between the electromagnetic actuator's initiation action and the measurable output, enabling time measurement without directly interfacing with the actuator's internal timing mechanism.
Solution Approach 2:
The patent replaces traditional mechanical timing mechanisms with sensor-based detection systems. Instead of using mechanical switches or contacts to determine timing, the system uses vibration sensors, acceleration sensors, or position sensors to detect the initiation moment of the switching mechanism, thereby achieving time measurement through physical field interactions rather than mechanical means.
2Measurement precision
If traditional auxiliary contacts are used to detect switching state, then basic position detection is possible, but the time needed for the switching mechanism to actually disconnect or re-establish the circuit cannot be measured
Solution Approach 1:
The patent utilizes mechanical vibration as a detection principle by placing vibration sensors or acceleration sensors on the switching mechanism. These sensors detect the characteristic vibrations generated when the switching mechanism initiates movement and when it completes the disconnect or re-establishment action, thereby providing precise timing information for the switching process.
Solution Approach 2:
The patent employs changes in physical state or signal characteristics (analogous to color changes in optical detection) to mark specific moments in the switching process. For example, the system detects changes in vibration amplitude, acceleration magnitude, or position state that serve as indicators for the initiation and completion of switching actions, enabling precise time measurement through these detectable transitions.
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
Enables precise measurement and monitoring of the switching mechanism's operation, allowing for timely fault detection and prevention of switching faults by analyzing the elapsed times and alerting for potential issues.
Implementation Method 1
an electromagnetic actuator releases the spring, which returns the switching mechanism to the open position of the switchgear
Implementation Method 2
The impact intensity measurement is performed by way of a vibration sensor that supplies a vibratory signal in response to the setting in motion of said switching mechanism
Data Source
AI summary
A method for monitoring switchgear, provided with a switching mechanism, including:monitoring an electric power supply signal to an electromagnetic actuator of the switching mechanism in order to detect the start of the supply of electric power to the actuator,monitoring an impact intensity measurement in the switchgear in order to detect the setting in motion of the switching mechanism,monitoring a parameter representative of the open or closed state of the switchgear in order to detect a change in state of the parameter, representative of an end of an opening or closing sequence of the switchgear.The method further includes:calculating a time TACT that has elapsed between the detection of the start of the supply of electric power to the actuator and the detection of the setting in motion of the switching mechanism of the switchgear,calculating a time TM that has elapsed between the setting in motion of the switching mechanism and the sequence end.


