Black Box Arc Interruption Analyzer for Power Supply Fault Diagnosis
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Solution Overview
Problem
Conventional arc interrupters struggle to accurately determine the cause of arc interruptions, leading to frequent electrical fires and disputes between suppliers and recipients due to temporary power instability and the difficulty in distinguishing between malfunction and arc characteristics.
Innovation Solution
A black box apparatus with a controller, current transformer, zero current transformer, voltage detector, and storage unit that captures and analyzes data on voltage, current, leakage, and arc current in half-cycle units before an interruption, enabling precise determination of arc interruption causes and power supply conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional interrupters are used to detect arcs and interrupt power supply, then electrical fire prevention is improved, but the ability to accurately determine the cause of interruption deteriorates due to temporary power instability and difficulty in distinguishing malfunction from arc characteristics
Solution Approach 1:
The system performs preliminary data collection and analysis by storing voltage, current, and arc current data for a predetermined time before interruption occurs. This preliminary action enables accurate retrospective analysis of the interruption cause by capturing the state of the power supply system before the interruption event, allowing distinction between temporary instability and actual malfunctions.
Solution Approach 2:
A black box apparatus is introduced as an intermediary device between the power supply system and the interrupter. This black box collects and stores electrical parameters (voltage, current, arc current) and provides data for cause analysis, serving as a mediator that bridges the gap between the interrupter's interruption action and the need for accurate cause determination.
2Reliability
If arc interruption functions are added to interrupters, then fire safety is improved, but device complexity increases due to multiple detection and control functions
Solution Approach 1:
The interrupter is designed with multi-functionality by integrating arc detection, interruption, and cause analysis capabilities into a single device. The black box apparatus serves multiple purposes: data collection, storage, and analysis, replacing the need for separate monitoring systems and reducing overall system complexity despite adding functional capabilities.
Solution Approach 2:
The black box apparatus is nested within or integrated with the interrupter system, with the storage unit and controller embedded in the overall interrupter structure. This nesting approach allows the additional functionality to be incorporated without significantly increasing external complexity, as the analysis components are contained within the existing interrupter framework.
3Loss of information
If data storage for cause analysis is implemented, then dispute resolution capability is improved, but loss of time for data collection and processing increases
Solution Approach 1:
The system performs preliminary data collection by continuously storing voltage, current, and arc current data before interruption events occur. This preliminary action ensures that when an interruption happens, the data is already captured and stored, eliminating the need for time-consuming data collection after the event and enabling immediate cause analysis.
Solution Approach 2:
The system replaces manual data collection and analysis methods with automated electronic data storage and processing. The controller automatically captures and stores electrical parameters in the storage unit, substituting manual investigation processes with automated digital recording, thereby reducing the time required for cause determination while improving data accuracy.
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 apparatus accurately identifies the cause of arc interruptions, enhancing product reliability and reducing the risk of electrical fires by distinguishing between malfunction and arc characteristics, and providing data for dispute resolution.
Implementation Method 1
a current transformer (CT) detecting a current
Implementation Method 2
a zero current transformer (ZCT) detecting a short circuit
Data Source
AI summary
Provided is a black box apparatus for analyzing a cause of arc interruption including: a controller which is installed on a power supply line and receives data detected from a CT detecting a current, a ZCT detecting a short circuit, and a voltage detector detecting a voltage; and an interruption unit which interrupts a power supply by receive a signal from the controller to operate a switch, in which the controller includes a calculation unit calculating data detected from the CT, the ZCT, and the voltage detector; a determination unit determining whether the arc occurs using the result of the calculation unit; and a storage unit storing data up to a predetermined time before the operation when the interruption unit operates to interrupt the power supply. Therefore, it is possible to accurately analyze reproduction for preventing occurrence of electrical fires and a cause of the arc interruption and determine an unstable condition of a power supply device which instantaneously occurs.