Protective Device Fault Indication Without Reset
Solution Overview
Problem
Current protective devices for electric lines, such as circuit breakers, struggle to provide clear and multiple fault information to users without requiring the device to be reset, particularly for complex fault types like electric arc faults.
Innovation Solution
A method and device that processes detected faults, stores information, and indicates this information via a light and/or sound indicator without needing to reset the protection device, using an electronic circuit and independent power source to supply the indicator, allowing for manual or automatic activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If mechanical displays or luminous displays are used to indicate fault information, then fault visualization is provided, but the device must be reset to display faults and multiple fault types cannot be displayed simultaneously
Solution Approach 1:
The patent segments the fault indication system into multiple independent LED indicators, each representing a specific fault type. This allows simultaneous display of multiple fault conditions without requiring device reset, as each LED can be independently controlled based on the detected fault type.
Solution Approach 2:
The patent stores fault information in memory before the device is reset. This preliminary storage action ensures that fault information is preserved and can be displayed after reset occurs, eliminating the need to reset the device just to view fault information.
2Reliability
If the protection device is tripped to interrupt current flow, then safety is improved, but fault information cannot be displayed without resetting the device
Solution Approach 1:
The patent performs preliminary storage of fault information in memory before the tripping action occurs. This ensures that even after the device trips and interrupts current flow, the fault information remains preserved and can be displayed by activating the appropriate LED indicators without requiring a reset.
Solution Approach 2:
The patent creates a copy of the fault information in the memory circuit, separate from the operational state of the protection device. This allows the fault information to be displayed independently of the tripped state, maintaining both safety through tripping and information availability through the copied data.
3Adaptability or versatility
If multiple fault types are detected, then comprehensive protection is provided, but precise fault identification is lost with traditional displays
Solution Approach 1:
The patent divides the fault indication system into segmented LED indicators, with each LED corresponding to a specific fault type (overload, short circuit, leakage current, electric arc). This segmentation enables precise identification of detected fault types while maintaining the ability to detect multiple fault conditions simultaneously.
Solution Approach 2:
The patent assigns specific properties to different LED indicators based on their position and color, where each LED's location and characteristics correspond to a specific fault type. This local quality differentiation enables precise fault identification while maintaining comprehensive multi-fault detection capability.
Data Source
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Figure 3~4
AI summary
The present invention relates to a method for indicating, from a protective device, at least one fault information related to at least one fault detected in a power line (L). Following the detection of at least one fault by the protective device, it consists of processing the fault(s) detected by the device to determine at least one fault information, storing the fault information(s), and, in the triggered state, indicating one or more of said pieces of information to the user by manually or automatically activating a visual and/or audible indicator carrying an electric current from the current (S) or voltage source supplying said line or from an independent power source. It also relates to such a protective device and an electrical installation comprising at least one such device.