Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing

Grease products recommended by OEM for conventional 11kV switchgears are generally trusted. Some disadvantages might however exist among them or their supply could be insufficient and lead to use of non-OEM-recommended grease. This paper reports analysis methods to evaluate both types of grease that...

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Main Authors:	Mohd Sabri, Mahmud, Sanuri, Ishak, Mohd Najib, Razali, Mohd Aizudin, Abdul Aziz, Musfafikri, Musa
Format:	Article
Language:	English
Published:	IIUM 2019
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/1/Grease%20Quality%20Issues%20on%20Middle%20Voltage%20Switchgear.pdf

id	ump-25518
recordtype	eprints
spelling	ump-255182019-07-26T03:52:11Z http://umpir.ump.edu.my/id/eprint/25518/ Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing Mohd Sabri, Mahmud Sanuri, Ishak Mohd Najib, Razali Mohd Aizudin, Abdul Aziz Musfafikri, Musa TP Chemical technology Grease products recommended by OEM for conventional 11kV switchgears are generally trusted. Some disadvantages might however exist among them or their supply could be insufficient and lead to use of non-OEM-recommended grease. This paper reports analysis methods to evaluate both types of grease that were recently used in the switchgears at local electrical distribution stations owned by Tenaga Nasional Berhad. Hardened, greenish and severely irritating greases probably caused by incompatible compounding, electrochemical reaction, and hazardous components, respectively, were among common problems faced by workers. Eight physical tests and four chemical tests were conducted on 10 grease samples using thermogravimetry, switchgear rig, gas chromatography and infrared spectroscopy besides other equipment and standard methods. Grease stability, oil bleeding, flammability of grease droplet and dropping point were among the characteristics determined in the analyses. The results reveal copper corrosion, chemical change, instable and inconsistent grease, and toxics in grease, which surprisingly included the OEM-recommended one. IIUM 2019 Article PeerReviewed pdf en cc_by_4 http://umpir.ump.edu.my/id/eprint/25518/1/Grease%20Quality%20Issues%20on%20Middle%20Voltage%20Switchgear.pdf Mohd Sabri, Mahmud and Sanuri, Ishak and Mohd Najib, Razali and Mohd Aizudin, Abdul Aziz and Musfafikri, Musa (2019) Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing. IIUM Engineering Journal, 20 (1). pp. 216-228. ISSN 2289-7860 https://doi.org/10.31436/iiumej.v20i1.995 https://doi.org/10.31436/iiumej.v20i1.995
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Mohd Sabri, Mahmud Sanuri, Ishak Mohd Najib, Razali Mohd Aizudin, Abdul Aziz Musfafikri, Musa Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
description	Grease products recommended by OEM for conventional 11kV switchgears are generally trusted. Some disadvantages might however exist among them or their supply could be insufficient and lead to use of non-OEM-recommended grease. This paper reports analysis methods to evaluate both types of grease that were recently used in the switchgears at local electrical distribution stations owned by Tenaga Nasional Berhad. Hardened, greenish and severely irritating greases probably caused by incompatible compounding, electrochemical reaction, and hazardous components, respectively, were among common problems faced by workers. Eight physical tests and four chemical tests were conducted on 10 grease samples using thermogravimetry, switchgear rig, gas chromatography and infrared spectroscopy besides other equipment and standard methods. Grease stability, oil bleeding, flammability of grease droplet and dropping point were among the characteristics determined in the analyses. The results reveal copper corrosion, chemical change, instable and inconsistent grease, and toxics in grease, which surprisingly included the OEM-recommended one.
format	Article
author	Mohd Sabri, Mahmud Sanuri, Ishak Mohd Najib, Razali Mohd Aizudin, Abdul Aziz Musfafikri, Musa
author_facet	Mohd Sabri, Mahmud Sanuri, Ishak Mohd Najib, Razali Mohd Aizudin, Abdul Aziz Musfafikri, Musa
author_sort	Mohd Sabri, Mahmud
title	Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
title_short	Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
title_full	Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
title_fullStr	Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
title_full_unstemmed	Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing
title_sort	grease quality issues on middle voltage switchgear: corrosivity, resistivity, safety and ageing
publisher	IIUM
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/ http://umpir.ump.edu.my/id/eprint/25518/1/Grease%20Quality%20Issues%20on%20Middle%20Voltage%20Switchgear.pdf
first_indexed	2023-09-18T22:39:13Z
last_indexed	2023-09-18T22:39:13Z
_version_	1777416802270183424

Grease quality issues on middle voltage switchgear: Corrosivity, resistivity, safety and ageing

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