Accelerated ageing test of non-ceramic insulators using solid layer method

2002 ◽  
Author(s):  
I.R. Vazquez ◽  
R.H. Corona
Keyword(s):  
Accelerated Ageing ◽  
Solid Layer ◽  
Ageing Test ◽  
Layer Method ◽  
Ceramic Insulators

scholarly journals Pollution Performance of RTV Coated Insulators

2020 ◽  
Vol 8 (6S) ◽  
pp. 35-40
Keyword(s):  
Leakage Current ◽  
Room Temperature ◽  
Pollution Level ◽  
Test Results ◽  
Solid Layer ◽  
Hydrophobic Coatings ◽  
Layer Method ◽  
Pollution Accumulation ◽  
Insulator Flashover ◽  
Ceramic Insulators

Theincrease in power demand necessitates the usage of EHV and UHV transmission system. The growth of industries causes higher pollution level in the ambient condition on insulators. This increases the pollution severity of the site which results in pollution accumulation on the surface of Insulators. This causes flashover across insulator. Flashover across polluted insulators poses a serious threat to the reliability of the system and leads to system outages. There are many remedial measures to minimize the flashover of a porcelain insulator under pollution conditions. One such method is the application of hydrophobic coatings such as Room Temperature Vulcanizing Silicone Rubber on the surface of ceramic insulators. Laboratory testing of coated insulators has been carried out based on the solid layer method and by the inclined plane tests at constant voltage to evaluate the RTV coatings withstands capability against tracking and erosion. The performance of the coatings was assessed by monitoring the leakage current on the insulator surfaces. The applied voltage and leakage current were monitored throughout the tests. In order to optimize and economize the usage of RTV coatings various tests were performed and results are analyzed. It was possible to conclude from the test results that one fourth length of RTV coating is sufficient to withstand the pollution severity.

Control of fungal contamination in the accelerated ageing test of Brassica spp.

2007 ◽  
Vol 35 (2) ◽  
pp. 380-386
Author(s):  
C.F.R. Leeks ◽  
J.G. Hampton ◽  
B.A. McKenzie ◽  
M. Dehghan-Shoar
Keyword(s):  
Accelerated Ageing ◽  
Fungal Contamination ◽  
Ageing Test ◽  
Brassica Spp

ACCELERATED AGEING TEST FACILITY FOR MV/LV DISTRIBUTION TRANSFORMERS: RESULTS AND DISCUSSION

2021 ◽  
Author(s):  
Jean Michel Couyade ◽  
Yves Bertrand ◽  
Mehdi Kanoun ◽  
Jean Pierre Gontier
Keyword(s):  
Test Facility ◽  
Accelerated Ageing ◽  
Ageing Test ◽  
Distribution Transformers

Automatic Temperature Measurement System of Accelerated Ageing Test for Fuse

2013 ◽  
Vol 313-314 ◽  
pp. 583-587
Author(s):  
Jie Shi ◽  
Shu Yu Tang
Keyword(s):  
Temperature Measurement ◽  
Measurement System ◽  
Accelerated Ageing ◽  
Automatic Temperature ◽  
Manual Measurement ◽  
Ageing Test ◽  
Temperature Measuring ◽  
Testing Method ◽  
Temperature Measurement System

In the accelerated ageingtest of fuses, manual measurement was used to collect the temperature of fuse.By this testing method, the errors introduced by human were inevitable. In thispaper, an automatic temperature measuring type accelerated ageing test systemfor fuses was developed. So, the errors introduced by human were overcome.

Real-Time Monitoring Device and Method of the Compression Stress of Rubber Materials

2012 ◽  
Vol 476-478 ◽  
pp. 2219-2222
Author(s):  
Ming Yuan Yang ◽  
Wei Fang Zhang ◽  
Yu Chen ◽  
Li Zhao ◽  
Mei Li Ding
Keyword(s):  
Real Time ◽  
Stress Measurement ◽  
Measurement Range ◽  
Aviation Industry ◽  
Accelerated Ageing ◽  
Compression Stress ◽  
Ageing Test ◽  
Digital Indicator ◽  
Fluctuation Range ◽  
The Relationship

An accelerated ageing test equipment with the pressure transducer and digital indicator is designed in the light of the features that the rubber seal used in aviation industry always stand compression stress. This equipment can do real-time monitor on the compression stress of rubber materials in accelerated ageing test. The stress measurement range is 0～980 N, and the temperature fluctuation range is 0～200°C. With this equipment, the compression stress relaxation and stress permanent set can be tested and the relationship between them in 100°C can be found.

scholarly journals Accelerated ageing as a vigour test on chickpea seeds

2020 ◽  
pp. 339
Author(s):  
Letícia Betânia Xavier Dias ◽  
Pedro Afonso de Melo Queiroz ◽  
Lara Bernardes da Silva Ferreira ◽  
Marco Antônio Moreira de Freitas ◽  
Érica Fernandes Leão Araújo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Salt Solution ◽  
Saline Solution ◽  
Deionized Water ◽  
Accelerated Ageing ◽  
Ageing Test ◽  
Randomized Design ◽  
Initial Characterization ◽  
Completely Randomized Design ◽  
Saline Test

The objective of this work was to establish the temperature and the period of exposure needed to perform the traditional accelerated ageing test with saturated NaCl salt solution on chickpea seeds. Eight seed lots from two cultivars, including four seeds each, were subjected to germination and vigour tests for initial characterization. Following the methodology of the traditional accelerated ageing test. The seeds were placed on stainless steel screens in boxes with 40 mL deionized water. They were kept at 41 and 45º Celsius for 24 and 48 hours. Furthermore, the accelerated ageing test using [40 g of NaCl in 100 mL of water, thus providing 76% of relative humidity in air] NaCl (salt) solution in place of the deionized water was performed. Aged seeds were sowed in germination paper and kept in a germination chamber at 41º and 45º Celsius. The evaluations were performed five and eight days after sowing. The statistical analysis was performed with a completely randomized design and four replications. The traditional ageing of both cultivars showed a water content higher than the tolerated limits at 48 hour period and 41 and 45 °C. In the saturated saline test, the cultivar BRS Aleppo produced consistent results at temperatures 45 °C for 24 h. The cultivar Cícero showed a low correlation with the initial characterization as the results of accelerated ageing. Thus, for ‘BRS Aleppo’, the recommended accelerated ageing methodology was application of saturated saline solution, when seed exposed to 41 °C for 24 hours with germination evaluation at the first count date. For 'Cicero', satisfactory results were not obtained, and new studies are required to establish a methodology.

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