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Failure analysis of a low-cost domestic permanent fault indicator and its solution

The concept of Permanent Fault Indicator (PFI) is that when a fault occurs in the circuit, the indicator will light up and continue to light up until the fault is rectified. A low-cost PFI using the neon bulb in series with a current limiting resistor is within the scope of the study. The research i...

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Main Author:	Aslam, Muhammad Amad
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/93106/1/MuhammadAmadAslamMSKE2020.pdf http://eprints.utm.my/id/eprint/93106/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:135870
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id	my.utm.93106
record_format	eprints
spelling	my.utm.931062021-11-07T06:00:43Z http://eprints.utm.my/id/eprint/93106/ Failure analysis of a low-cost domestic permanent fault indicator and its solution Aslam, Muhammad Amad TK Electrical engineering. Electronics Nuclear engineering The concept of Permanent Fault Indicator (PFI) is that when a fault occurs in the circuit, the indicator will light up and continue to light up until the fault is rectified. A low-cost PFI using the neon bulb in series with a current limiting resistor is within the scope of the study. The research is about analyzing the operation of PFI based on the neon bulb, in a real scenario. Simulation, as well as laboratory experiments, were conducted for testing the response of Permanent Fault Indicator on a real scenario. The loophole (false indication when loads are connected) was identified and solved through the development of a low-cost prototype. Falstad online and Multisim™ software were used for simulation/modeling. Circuit voltage and current were monitored for analysis. In case of normal condition (load connected and no short circuit), although the neon indicator is energized, there are some millivolts (depending on load type) across the load. So these few volts are sensed by a comparator circuit (dual comparator configuration) to de-energize it's Light Emitting Diode (LED), thus enabling the user to discriminate between a short circuit and a normal condition, which was not possible with existing PFI. The developed prototype was tested on resistive as well as inductive loads, which allows the user to test whether a short circuit exists or the tripping of breaker is due to some other problem. Both indicators (Neon and LED) are energized only in case of short circuit. Deployment of a low-cost prototype integrated with PFI on distribution boards would increase the life span of the protective device by reducing their operation cycles on high fault current, as well as safety for personnel. Lastly, it would reduce unwanted power interruptions, due to long-duration unwanted tripping of circuit breakers, by resetting them after checking the status of indicators. 2020 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/93106/1/MuhammadAmadAslamMSKE2020.pdf Aslam, Muhammad Amad (2020) Failure analysis of a low-cost domestic permanent fault indicator and its solution. Masters thesis, Universiti Teknologi Malaysia, Faculty of Engineering - School of Electrical Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:135870
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Aslam, Muhammad Amad Failure analysis of a low-cost domestic permanent fault indicator and its solution
description	The concept of Permanent Fault Indicator (PFI) is that when a fault occurs in the circuit, the indicator will light up and continue to light up until the fault is rectified. A low-cost PFI using the neon bulb in series with a current limiting resistor is within the scope of the study. The research is about analyzing the operation of PFI based on the neon bulb, in a real scenario. Simulation, as well as laboratory experiments, were conducted for testing the response of Permanent Fault Indicator on a real scenario. The loophole (false indication when loads are connected) was identified and solved through the development of a low-cost prototype. Falstad online and Multisim™ software were used for simulation/modeling. Circuit voltage and current were monitored for analysis. In case of normal condition (load connected and no short circuit), although the neon indicator is energized, there are some millivolts (depending on load type) across the load. So these few volts are sensed by a comparator circuit (dual comparator configuration) to de-energize it's Light Emitting Diode (LED), thus enabling the user to discriminate between a short circuit and a normal condition, which was not possible with existing PFI. The developed prototype was tested on resistive as well as inductive loads, which allows the user to test whether a short circuit exists or the tripping of breaker is due to some other problem. Both indicators (Neon and LED) are energized only in case of short circuit. Deployment of a low-cost prototype integrated with PFI on distribution boards would increase the life span of the protective device by reducing their operation cycles on high fault current, as well as safety for personnel. Lastly, it would reduce unwanted power interruptions, due to long-duration unwanted tripping of circuit breakers, by resetting them after checking the status of indicators.
format	Thesis
author	Aslam, Muhammad Amad
author_facet	Aslam, Muhammad Amad
author_sort	Aslam, Muhammad Amad
title	Failure analysis of a low-cost domestic permanent fault indicator and its solution
title_short	Failure analysis of a low-cost domestic permanent fault indicator and its solution
title_full	Failure analysis of a low-cost domestic permanent fault indicator and its solution
title_fullStr	Failure analysis of a low-cost domestic permanent fault indicator and its solution
title_full_unstemmed	Failure analysis of a low-cost domestic permanent fault indicator and its solution
title_sort	failure analysis of a low-cost domestic permanent fault indicator and its solution
publishDate	2020
url	http://eprints.utm.my/id/eprint/93106/1/MuhammadAmadAslamMSKE2020.pdf http://eprints.utm.my/id/eprint/93106/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:135870
_version_	1717093420877479936
score	13.211869

Failure analysis of a low-cost domestic permanent fault indicator and its solution

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