Charging Circuit Interrupt Device Self-Test Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices and methods for interrupting a charging circuit lack effective self-testing capabilities for the leakage-detecting function, which is crucial for ensuring safety during maintenance by promptly identifying and addressing power leaks.
Innovation Solution
A charging circuit interrupt device comprising a current-detecting unit, a self-test device, and a controller that generates a detection enable signal to create a bypass path for a test current, allowing the system to self-test the leakage-detecting function and determine its operational status, thereby ensuring the safe application or interruption of power based on the leakage signal received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-test device is added to enable self-testing of the leakage-detecting function, then the reliability of the system is improved, but the device complexity increases
Solution Approach 1:
The self-test device performs preliminary testing of the leakage-detecting function before normal operation begins. The controller activates the self-test mode to generate a test current that simulates leakage conditions, verifying the current-detecting unit's functionality in advance. This preliminary action ensures the system is ready for safe operation without requiring separate manual testing procedures.
Solution Approach 2:
The system performs self-diagnosis through the self-test device, which automatically tests the leakage-detecting function using the existing current-detecting unit. The controller manages the self-test process internally, eliminating the need for external testing equipment or manual intervention. This self-service capability improves reliability while minimizing the addition of external components.
2Measurement precision
If the system continuously monitors for leakage signals during self-test mode, then the measurement precision is improved, but the loss of time increases
Solution Approach 1:
The controller implements periodic monitoring of leakage signals during self-test mode, checking for the presence of test current at regular intervals rather than continuous monitoring. This periodic approach maintains sufficient measurement precision to detect leakage conditions while reducing the overall test time compared to uninterrupted continuous monitoring.
Solution Approach 2:
The system applies a test current that exceeds normal operating levels to ensure reliable detection during self-test. This excessive action approach ensures that even marginal leakage conditions are detected with high precision, while the test is limited to a specific duration rather than indefinite monitoring, balancing precision with time efficiency.
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 solution enables reliable self-testing of the leakage-detecting function, ensuring immediate detection of power leaks and safe operation by determining the functionality of the leakage-detecting mechanism, thus protecting maintenance personnel and maintaining system integrity.
Implementation Method 1
The current-detecting unit executes a leakage-detecting function. The current-detecting unit generates a leakage signal when a current difference in a section of the first input power line and the second input power line is detected.
Implementation Method 2
The current-detecting unit executes a leakage-detecting function. The current-detecting unit generates a leakage signal when a current difference in a section of the first input power line and the second input power line is detected.
Implementation Method 3
The self-test device generates a bypass path according to a detection enable signal, such that a test current flows from a first node of the first input power line to a second node of the second input power line
Data Source
AI summary
A charging circuit interrupting device for applying an input voltage provided by first and second input power lines of a power system to first and second output power lines of an output system includes a current-detecting unit, a self-test device, and a controller. The current-detecting unit executes a leakage-detection function and generates a leakage signal when the current difference between the first and second power lines is detected. The self-test device generates a bypass path according to the detection enable signal so that there is a current difference between the first and the second input power lines. When operating in a self-test mode, the controller generates the detection enable signal, determines that the leakage-detecting function is normal, and enters a normal mode to apply the input voltage to the output system when the leakage signal is received.