Dual Mode Surge Protector With Status Indicator
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Solution Overview
Problem
Surge protection devices fail to indicate their operational status effectively, allowing power to reach loads even when the device is no longer functional, which can lead to damage from transient surges.
Innovation Solution
A surge protector with a fuse, differential mode protection circuit, common mode protection circuit, and an indicator circuit that monitors the operational status, using surge suppressors like metal oxide varistors and gas discharge tubes to protect against surges, and a visible or audible indicator to signal operational status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surge protector is deployed to protect loads from voltage surges, then loads are protected from transient surges, but the operational status of the surge protector is not indicated, allowing power to reach loads even when the device is no longer functional
Solution Approach 1:
The patent implements an indicator circuit that provides visual feedback about the operational status of the surge protector. The indicator circuit includes an LED that illuminates to indicate whether the surge protector is functioning properly or has failed, enabling users to receive immediate feedback about the device's status without needing to perform separate diagnostic tests.
Solution Approach 2:
The patent introduces an intermediary indicator circuit that mediates between the surge protection circuits and the user. This indicator circuit translates the complex internal operational state of the surge protector into a simple visual signal that users can easily interpret, bridging the gap between the technical system and user understanding.
2Reliability
If multiple protection circuits are used to protect against both differential and common mode surges, then comprehensive surge protection is achieved, but device complexity increases
Solution Approach 1:
The patent combines multiple protection functions into a single integrated device. The surge protector incorporates both differential mode protection circuits and common mode protection circuits within one housing, along with an indicator circuit, creating a unified solution that provides comprehensive protection without requiring multiple separate devices.
Solution Approach 2:
The patent designs the surge protector to perform multiple functions simultaneously: protecting against differential mode surges, protecting against common mode surges, and indicating operational status. This multi-functional approach consolidates what would traditionally require separate devices into a single universal protection unit.
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 solution effectively protects loads from both differential and common mode surges by indicating when the surge protector is operational or not, ensuring timely replacement and preventing damage.
Implementation Method 1
The at least one surge suppressor may be a varistor, such as a metal oxide varistor
Implementation Method 2
In another embodiment, the at least one surge suppressor may be a gas discharge suppressor, such as a gas discharge tube
Implementation Method 3
The visible indicator may be a light source, such as a light emitting diode
Data Source
AI summary
A surge protector having a first hot line, a first load line, a second hot line, a second load line, and a ground line, the surge protector including a first fuse coupled between the first hot line and the first load line; a second fuse coupled between the second hot line and the second load line; a differential mode protection circuit coupled between the first hot line and the second hot line; and a common mode protection circuit coupled to the first hot line, the second hot line and the ground line.