Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant

One of the most prominent problems in power quality is the voltage sag. It leads to equipment failure, interruptions and product damage which amount to substantial financial losses to industries. AC contactor is commonly installed in industries as a switching device due to its robust design. However...

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Main Author:	Hazri Dahalan, Md Razip
Format:	Thesis
Language:	English
Published:	2021
Subjects:	T Technology (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/34772/1/01.Determining%20the%20voltage%20sag%20immunity%20of%20ac%20contactor%20with%20field%20testing%20in%20petrochemical%20plant.pdf
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id	my-ump-ir.34772
record_format	uketd_dc
spelling	my-ump-ir.347722023-11-01T08:43:30Z Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant 2021-12 Hazri Dahalan, Md Razip T Technology (General) TA Engineering (General). Civil engineering (General) TK Electrical engineering. Electronics Nuclear engineering One of the most prominent problems in power quality is the voltage sag. It leads to equipment failure, interruptions and product damage which amount to substantial financial losses to industries. AC contactor is commonly installed in industries as a switching device due to its robust design. However, they are susceptible to voltage sag and could malfunction, leading to interruption. AC contactors were tested in the laboratory environment, which involved miniature contactors, whereas those installed in the industry are typically larger. Some of the tests referred to the SEMI F47 standard, developed specifically for the semiconductor industry. There are mixtures of ageing and new contactors in industrial operation as the former are being replaced gradually. Nevertheless, there is limited knowledge of the immunity of these contactors concerning voltage sag. A better understanding of the contactor’s immunity can assess the risk of failure, and a suitable asset management strategy can be developed. The objective of this study was to investigate the effect of voltage sag magnitude, duration and point on wave for ageing and new AC contactors installed in the industry. A field test was conducted on new and ageing contactors to produce the characteristic of voltage tolerance curves. The test setup was based on the recommendation in IEC 61000-4-11 standard. The test procedure was developed, and a test matrix was proposed to ensure efficiency and prevent error during the field test. The responses were compared to the limits recommended in IEC 61000-4-11 and SEMI F47-0706 standards. The point on wave has a significant influence on the voltage tolerance curves of the ageing contactors. On the contrary, the point on waves has an insignificant effect on the new contactors. The pattern of voltage tolerance curves does not vary when subjected to a different point on waves. Hence it is established that the new contactors are more immune to voltage sag than the ageing contactor. 2021-12 Thesis http://umpir.ump.edu.my/id/eprint/34772/ http://umpir.ump.edu.my/id/eprint/34772/1/01.Determining%20the%20voltage%20sag%20immunity%20of%20ac%20contactor%20with%20field%20testing%20in%20petrochemical%20plant.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Electrical & Electronics Engineering Technology Ahmad, Abu Zaharin
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
advisor	Ahmad, Abu Zaharin
topic	T Technology (General) T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) T Technology (General) Hazri Dahalan, Md Razip Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
description	One of the most prominent problems in power quality is the voltage sag. It leads to equipment failure, interruptions and product damage which amount to substantial financial losses to industries. AC contactor is commonly installed in industries as a switching device due to its robust design. However, they are susceptible to voltage sag and could malfunction, leading to interruption. AC contactors were tested in the laboratory environment, which involved miniature contactors, whereas those installed in the industry are typically larger. Some of the tests referred to the SEMI F47 standard, developed specifically for the semiconductor industry. There are mixtures of ageing and new contactors in industrial operation as the former are being replaced gradually. Nevertheless, there is limited knowledge of the immunity of these contactors concerning voltage sag. A better understanding of the contactor’s immunity can assess the risk of failure, and a suitable asset management strategy can be developed. The objective of this study was to investigate the effect of voltage sag magnitude, duration and point on wave for ageing and new AC contactors installed in the industry. A field test was conducted on new and ageing contactors to produce the characteristic of voltage tolerance curves. The test setup was based on the recommendation in IEC 61000-4-11 standard. The test procedure was developed, and a test matrix was proposed to ensure efficiency and prevent error during the field test. The responses were compared to the limits recommended in IEC 61000-4-11 and SEMI F47-0706 standards. The point on wave has a significant influence on the voltage tolerance curves of the ageing contactors. On the contrary, the point on waves has an insignificant effect on the new contactors. The pattern of voltage tolerance curves does not vary when subjected to a different point on waves. Hence it is established that the new contactors are more immune to voltage sag than the ageing contactor.
format	Thesis
qualification_level	Master's degree
author	Hazri Dahalan, Md Razip
author_facet	Hazri Dahalan, Md Razip
author_sort	Hazri Dahalan, Md Razip
title	Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
title_short	Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
title_full	Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
title_fullStr	Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
title_full_unstemmed	Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
title_sort	determining the voltage sag immunity of ac contactor with field testing in petrochemical plant
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Electrical & Electronics Engineering Technology
publishDate	2021
url	http://umpir.ump.edu.my/id/eprint/34772/1/01.Determining%20the%20voltage%20sag%20immunity%20of%20ac%20contactor%20with%20field%20testing%20in%20petrochemical%20plant.pdf
_version_	1783732212186742784

Determining the voltage sag immunity of ac contactor with field testing in petrochemical plant

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