Surge Protector Indicator Circuit for Status Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Surge protection devices fail to indicate their operational status effectively when they reach the end of their life, potentially allowing power to reach loads even when the device is no longer functional, leading to unprotected voltage surges.
Innovation Solution
A surge protector design incorporating a fuse between the hot and load lines, differential mode protection circuits between the load and neutral lines, common mode protection circuits between the load, neutral, and ground lines, and an indicator circuit to monitor and indicate the operational status, using visible or audible indicators such as light emitting diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surge protectors are deployed to protect loads from voltage surges, then loads are protected from transient surges, but power may still reach loads even when the surge protector reaches end of life and is no longer operational
Solution Approach 1:
The patent implements an indicator circuit that provides continuous feedback about the operational status of the surge protector. This feedback mechanism uses visible (LED) and audible (buzzer) indicators to communicate whether the surge protector is functional or has reached end-of-life, solving the problem of information loss about device status.
Solution Approach 2:
The patent introduces an intermediary indicator circuit that mediates between the surge protection circuits and the user. This intermediary translates the complex internal state of the surge protector into simple, observable signals (light and sound) that clearly indicate operational status, preventing users from unknowingly using failed devices.
2Reliability
If indicator circuits are added to monitor operational status, then users can detect when surge protectors fail, but device complexity increases
Solution Approach 1:
The indicator circuit serves multiple functions simultaneously: it monitors the operational status of both differential mode and common mode protection circuits, provides visual indication via LED, and provides audible indication via buzzer. This multi-functionality consolidates what could be separate monitoring systems into a single integrated circuit, reducing overall complexity.
Solution Approach 2:
The patent merges the monitoring of multiple protection circuits (differential mode and common mode) into a single indicator circuit that controls both visual and audible indicators. By combining these functions, the patent reduces the complexity that would result from separate indicator systems for each protection circuit.
3Reliability
If multiple protection circuits are implemented for both differential and common mode surges, then comprehensive surge protection is provided, but device complexity increases
Solution Approach 1:
The patent segments surge protection into two distinct functional modules: differential mode protection circuit and common mode protection circuit. Each module addresses a specific type of surge independently, allowing for targeted protection design that is simpler than a monolithic approach while providing comprehensive coverage when combined.
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
Ensures loads are protected from both differential and common mode transient surges by effectively isolating them when the surge protector is operational and providing a clear visual or audible indication of its status, preventing power delivery when the device is no longer functional.
Implementation Method 1
The visible indicator may be a light source, such as a light emitting diode
Data Source
AI summary
A surge protector having a hot line, a load line, a neutral line, and a ground line, the surge protector is provided. The surge protector has a fuse coupled between the hot line and the load line to protect loads from current surges. A differential mode protection circuit is coupled between the load line and the neutral line to protect loads from differential mode transient voltage surges. A common mode protection circuit is coupled to the load line, the neutral line and the ground line to protect loads from common mode transient voltage surges. An indicator circuit monitors the differential mode protection circuit and the common mode protection circuit to provide an indication as to the operational status of the surge protector.