INDIGENOUS MANUFACTURE AND CHARACTERIZATION OF ELECTRICAL PORCELAIN INSULATOR
DOI:
https://doi.org/10.4314/njt.241.484Keywords:
kfq sample, green-ware, sintering, volume resistivity, surface resistivityAbstract
In power systems, there is an ever-increasing demand placed on porcelain insulators especially for outdoor applications. Additionally, the huge cost of importation has resulted in a growing need for the local manufacture. To this end, an electrical porcelain insulator was manufactured from locally available raw materials and characterized. The study investigates a porcelain type percentage composition of kaolin, 30; ball clay, 10;feldspar, 22 and quartz, 38. The sample was manufactured by the dry process technique. The pulverized and thoroughly mixed composition was compacted at a pressure of 2 X 108 N/m2 and fired at a temperature of 1355oC with a soaking time of 3 hours for proper sintering. The results of the characterization show that the sample has a volume resistivity of 1.97 X 109 ohm cm, breakdown voltage of 26kV/mm, zero water absorption and dielectric constant between 9.2 and 10.8 within the frequency range considered. These results when compared with those of the commercial variety show that the locally manufactured sample satisfies the stringent requirements of a good insulating material.
Downloads
Issue
Section
License
The contents of the articles are the sole opinion of the author(s) and not of NIJOTECH.
NIJOTECH allows open access for distribution of the published articles in any media so long as whole (not part) of articles are distributed.
A copyright and statement of originality documents will need to be filled out clearly and signed prior to publication of an accepted article. The Copyright form can be downloaded from http://nijotech.com/downloads/COPYRIGHT%20FORM.pdf while the Statement of Originality is in http://nijotech.com/downloads/Statement%20of%20Originality.pdf
For articles that were developed from funded research, a clear acknowledgement of such support should be mentioned in the article with relevant references. Authors are expected to provide complete information on the sponsorship and intellectual property rights of the article together with all exceptions.
It is forbidden to publish the same research report in more than one journal.