Electronic Switch Detector for Bus Communication Without Interference
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Solution Overview
Problem
Existing electronic trip devices struggle to connect with data buses without interfering with their operation, posing safety risks and disrupting the measurement or triggering mechanisms.
Innovation Solution
A switch design that includes a detector connected to the measuring device, allowing it to monitor the activation of the interrupt mechanism without interfering, producing status signals that can be sent to a processing unit to generate a power line cut message and communicate with a data bus, distinguishing between AC and DC differential current interruptions using sensing elements and comparators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a connection between the switch and the data bus is established to supply information, then data communication capability is improved, but the operation of the measuring or triggering device may be disturbed, affecting safety
Solution Approach 1:
The patent introduces an intermediary circuit that couples the measuring device output to the data bus without direct connection. This intermediary architecture allows data communication while electrically isolating the sensitive measuring and triggering circuits from potential disturbances on the bus, thus resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The system is segmented into distinct functional blocks: the measuring device, the triggering device, and the data communication interface. Each segment operates independently with defined interfaces, allowing data bus connection to be established without interfering with the core measuring and triggering functions, thereby maintaining safety while enabling communication.
2Adaptability or versatility
If intervention is made at the level of the measuring device or trip device to collect data, then data collection capability is improved, but the operation of these devices is disturbed, affecting safety
Solution Approach 1:
Instead of directly accessing or modifying the measuring device operation, the system creates a copy or representation of the measurement data through the measuring device's existing output. This copied information is then processed and transmitted to the data bus, enabling data collection without any intervention that would disturb the original measuring and triggering operations.
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 safe and reliable communication of fault current information to a data bus without disturbing the operation of the measuring or triggering devices, effectively managing power line cuts and identifying the cause of interruptions.
Implementation Method 1
The pick-up member picks up by induction electric current flowing in the electric current line which passes through the switch
Data Source
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AI summary
A switch comprising a sensing element for an electric current flowing in a conductor and a measuring element arranged to deliver a voltage corresponding to the sensed electric current, which switch includes a triggering element arranged to activate a conductor interruption mechanism when the voltage delivered by the measuring element crosses a predetermined threshold, which switch includes a detector that detects the activation of the interruption mechanism by the triggering element and produces a first status signal when the activation of the interruption mechanism by the triggering element has been detected, which detector is connected to a first input of a processing unit that also includes a second input for receiving a second status signal indicating a mechanical break in the conductor.which processing unit is arranged to produce, based on received status signals, a message to cut off the power line.