Voltage Presence And Absence Tester for Wide-Range Panel Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing voltage testers lack flexibility in operating voltage range, fail to check wire integrity with busbars, and have limited applicability to polyphase AC circuits, posing safety risks during maintenance and servicing of electrical systems.
Innovation Solution
A voltage tester system with a Voltage Presence Indicator (VPI) and Absence of Voltage Tester (AVT) circuits, utilizing zener diodes, bi-directional current limiters, and optocouplers, capable of detecting hazardous voltages from 3V to 5879V, ensuring visual indication and wire connectivity, and providing flexible threshold adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If portable voltmeters or multi-meters are used for voltage verification, then voltage testing can be performed, but workers are exposed to energized circuits and conductors during live portions of the test
Solution Approach 1:
The patent introduces an intermediary device (voltage tester with indicator circuit) that mediates between the worker and the energized circuit. The indicator circuit acts as a safe intermediary that provides visual feedback about voltage presence without requiring direct contact with energized conductors, thus eliminating the harmful exposure while maintaining safety verification capability
Solution Approach 2:
The patent replaces the mechanical/procedural approach of using portable voltmeters with a visual indicator system. Instead of relying on electrical measurements and human interpretation of meter readings while exposed to energy, the system uses optical indicators (LEDs or lamps) to provide intuitive visual feedback about voltage presence, substituting electrical measurement with optical signaling for safer operation
2Adaptability or versatility
If existing voltage testers are used, then voltage detection is possible, but the operating voltage range is limited and cannot be flexibly adjusted
Solution Approach 1:
The patent implements dynamic adaptability by making the voltage tester adjustable to different operating voltage ranges. The indicator circuit can be configured or adjusted to detect voltages across a wide range (from low voltage to high voltage applications), allowing the same device to adapt to different electrical systems and maintenance scenarios while maintaining accurate safety verification
Solution Approach 2:
The patent applies parameter changes by allowing modification of the voltage tester's detection parameters (such as threshold voltage levels) to match different application requirements. This enables the device to reliably detect hazardous voltages across varying operating conditions by adjusting detection parameters rather than requiring multiple specialized devices
3Reliability
If conventional voltage testers are used, then voltage presence can be detected, but wire integrity with busbars cannot be checked
Solution Approach 1:
The patent applies universality by designing a multi-functional voltage tester that performs multiple safety verification tasks: detecting voltage presence, verifying wire integrity with busbars, and providing visual indicators. This consolidates multiple previously separate testing functions into a single device, improving safety verification completeness without proportionally increasing device complexity
4Reliability
If permanently installed voltage detection devices are used, then voltage status can be continuously monitored, but the device complexity and installation requirements increase
Solution Approach 1:
The patent applies segmentation by dividing the voltage detection function into modular components: a voltage sensing circuit, an indicator circuit, and a housing unit. This modular segmented design allows for easier installation and maintenance while enabling continuous safety monitoring, as each module can be independently installed or replaced without affecting the entire system
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 safe maintenance by confirming the absence of hazardous voltages and verifying wire connectivity, offering wide-range voltage detection and continuous visual monitoring, reducing exposure risks to workers.
Implementation Method 1
The voltage tester circuit comprises a voltage presence indicator circuit and an absence of voltage tester circuit... utilizing zener diodes, bi-directional current limiters, and optocouplers
Implementation Method 2
utilizing zener diodes, bi-directional current limiters, and optocouplers, capable of detecting hazardous voltages from 3V to 5879V
Data Source
AI summary
A voltage tester system/device for safety application in AC & DC electrical systems and method thereof. The system/device includes a voltage presence indicator (VPI) circuit including plurality of zener diodes, bi-directional current-limiter circuits, VPI-LEDs and an absence of voltage tester (AVT) circuit including plurality of comparator circuits, optocouplers, DC-DC converters, microcontroller, power-management circuit, battery, LEDs and diodes. The VPI circuit converts electrical energy potential between the lines in range of 3 to 3394 volts (phase to neutral)/5.2 to 5879 volts (phase to phase) into electrical inputs that drives VPI-LEDs to produce light output. The AVT circuit helps in checking circuit wires intactness with their respective busbars and verify absence of hazardous voltage by providing positive indication with a GREEN-light when safe voltage level is attained at connected leads, and voltage is less than a preset threshold value.