Leakage Current Interruption Device with Automatic Fault Detection
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Solution Overview
Problem
Leakage current detection and interruption devices with self-testing functions often require manual intervention to address faulty trip coils or semiconductor devices, posing a safety threat if users are not immediately aware of malfunctions.
Innovation Solution
A leakage current detection and interruption device that automatically disconnects power when the trip coil or semiconductor device is faulty, utilizing a switch module, leakage current detection module, trip drive module, coil function detection module, self-test module, and detection drive module to generate electromagnetic forces and signals for automatic disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a leakage current detection and interruption device with self-testing function is designed, then the device can detect leakage currents and test its own functionality, but when the trip coil or semiconductor device is faulty, the device can only generate audible or visible alarms requiring manual intervention, which still poses safety threats
Solution Approach 1:
The device automatically detects faults in the trip coil and semiconductor device through the detection drive module, and automatically interrupts power by driving the switch module to disconnect the output end from the input end, eliminating the need for manual user intervention when faults occur
Solution Approach 2:
The detection drive module continuously monitors the operational status of the trip coil and semiconductor device, providing feedback signals that trigger automatic power interruption when fault conditions are detected, ensuring the device responds autonomously to safety threats
2Adaptability or versatility
If the device requires user testing before use and during operation, then users can check device functionality, but users may not immediately become aware of malfunctions and continue using the device, creating safety risks
Solution Approach 1:
The detection drive module automatically performs continuous monitoring and fault detection without requiring user initiation of tests, and automatically executes power interruption when faults are detected, ensuring safety without relying on user awareness or action
Solution Approach 2:
The device performs preliminary fault detection through the detection drive module before safety threats can materialize, and takes preliminary action by automatically preparing the interruption mechanism so that power can be immediately cut off when faults are detected
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
Enhances safety and convenience by automatically interrupting power connection without user intervention when faults are detected in the trip coil or semiconductor device, preventing potential hazards.
Implementation Method 1
a first coil, configured to generate an electromagnetic force to drive the switch module
Implementation Method 2
a second coil, configured to generate another electromagnetic force to drive the switch module
Data Source
AI summary
A leakage current detection and interruption device coupled to power supply lines, including a leakage current detection module for generating a leakage current fault signal when detecting leakage currents on the lines; a trip drive module responsive to the leakage current fault signal to drive a switch to disconnect power on the lines, the trip drive module including a first semiconductor device responsive to the leakage current fault signal to cause a current in a first coil to drive the switch; a coil function detection module for generating a coil fault signal when detecting a fault in the first coil; a self-test module for generating a self-test fault signal when detecting a fault in the leakage current detection module or the first semiconductor device; and a detection drive module for driving the switch to disconnect power in response to the coil fault signal or the self-test fault signal.