Earth Fault Localization in Device Loops
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Locating earth faults in low-power electronic systems with multiple devices connected in a loop is a tedious manual process, as existing technologies can detect the fault but not determine its precise location within the loop.
Innovation Solution
A method involving isolating devices within the loop and iteratively determining if the earth fault exists between them, using a controller to detect faults and unique index numbers to systematically isolate and test each device, allowing for the localization of the fault between specific devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual examination of each device and wiring is performed to locate earth faults, then the fault location can be determined, but the process becomes tedious and time-consuming
Solution Approach 1:
The loop is divided into multiple segments by sequentially isolating individual devices. Each isolation step segments the loop to narrow down the fault location between two isolated devices, transforming a single large search space into multiple smaller segments that can be systematically examined.
Solution Approach 2:
Isolators are introduced as intermediary components between devices in the loop. These isolators act as controllable switches that can disconnect individual devices from the loop, enabling systematic fault localization without requiring manual examination of each device and wiring connection.
2Measurement precision
If each device is isolated and tested to locate the earth fault, then the fault can be precisely identified, but the system complexity increases
Solution Approach 1:
Each device in the loop is equipped with an isolator that serves multiple functions: normal operation switching and fault isolation. This universal component enables both routine device control and systematic fault localization, reducing the need for separate dedicated isolation mechanisms for each device.
Solution Approach 2:
The system incorporates feedback through earth fault detection that monitors the loop status and provides information about fault presence. This feedback mechanism guides the isolation process by indicating when a fault exists in the current configuration, enabling automated or semi-automated fault localization without complex manual procedures.
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
This approach enables efficient localization of earth faults, reducing the time and effort required for repair by systematically isolating and testing each device in the loop, thereby facilitating quicker identification and fixing of the fault.
Implementation Method 1
isolating a first device within the loop; isolating a second device within the loop
Implementation Method 2
detecting an earth fault in the loop... determining if current flowing through a positive leg of the loop is equal to the current flowing through a negative leg of the loop
Data Source
AI summary
A method and system of determining the location of an earth fault within a loop of devices is disclosed. Upon the detection of an earth fault within the loop comprising a plurality of devices, a first device within the loop is isolated along with a second device. While the first device and the second device are isolated, it is determined if the earth fault still exists. If the earth fault no longer exists, then determine that the earth fault is located between the first device and the second device. This can be iterated through each adjacent pair of devices in the loop to localize the earth fault between the devices.