Electrical Control Device Arc Detection and Diagnostics
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Solution Overview
Problem
Existing electrical control and protection devices fail to effectively detect and respond to electrical malfunctions such as arcs, short-circuits, and overloads, leading to sudden service interruptions and difficulty in diagnosing faults after tripping.
Innovation Solution
An electrical control and protection device that includes a measurement assembly for detecting voltage, current, and residual current, a processing module for generating trigger and diagnostic signals, and a circuit breaker to stop current flow, along with auxiliary power means to maintain functionality during main power loss, enabling enhanced protection and diagnostic capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device uses measurements for electric arc detection only, then the detection capability for arcs is achieved, but additional protection against other electrical malfunctions is lost
Solution Approach 1:
The processing module is designed to perform multiple detection functions using the same measurement inputs. It detects electric arcs by analyzing voltage and current measurements, and simultaneously detects other electrical malfunctions such as short-circuits and overloads by evaluating the same measurement data against different criteria and thresholds, thereby making the device multi-functional without requiring separate measurement systems.
2Reliability
If the device transmits trigger signal immediately upon malfunction detection, then rapid protection is achieved, but diagnostic information transmission is lost
Solution Approach 1:
The processing module performs preliminary action by transmitting diagnostic information about the detected malfunction before transmitting the trigger signal that activates the circuit breaker. This ensures that diagnostic data is captured and communicated while the system is still operational, prior to the protective disconnection, thereby preserving information about the nature and location of the fault.
3Object-affected harmful factors
If the main power supply stops upon circuit breaker tripping, then electrical safety is achieved, but processing module functionality is lost
Solution Approach 1:
The auxiliary power supply provides beforehand cushioning by taking over power provision to the processing module when the main power supply is interrupted due to circuit breaker tripping. This backup power source ensures that the processing module remains operational during and after the protective disconnection, maintaining diagnostic and monitoring capabilities even when the main electrical supply is cut off for safety.
Data Source
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AI summary
Electrical control and protection device (10) for a set (2, 3) of electrical conductor(s), comprising: - means for measuring voltage or current (17, 18) in at least one conductor; - processing means (12), adapted to detect an electric arc in the conductors according to measurements made by said measuring means and to generate, in the event of detection of an electric arc, a tripping signal (TRIP) and transmit it to an electrical switch (14) adapted to stop the flow of electric current in at least said conductor;the processing means being adapted to detect further, based on certain of said voltage or current measurements, at least one malfunction among a short circuit, an electrical current overload, an overvoltage, an undervoltage and a residual current relating to at least said conductor and to generate an alert or pre-alarm signal before the generation of the trigger signal.