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. (Published)
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Abstract
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.
| Item Type: | Article |
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| Uncontrolled Keywords: | Grease, Switchgear, Analysis Method, Corrosivity, Resistivity, Safety and Ageing |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering |
| Depositing User: | Noorul Farina Arifin |
| Date Deposited: | 26 Jul 2019 03:52 |
| Last Modified: | 26 Jul 2019 03:52 |
| URI: | http://umpir.ump.edu.my/id/eprint/25518 |
| Download Statistic: | View Download Statistics |
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