Abstract
In recent years, the deficiencies of ceramic insulators along with their high maintenance costs have resulted in the replacement of ceramic insulators with silicon type in the pollution area. This idea has been employed for more than two decades in the polluted areas. Humidity of the weather in the south of Iran and the presence of pollutants in the air have made special conditions for construction and maintenance of some equipment including transformer bushings. Usual ceramic bushings, due to their ability in absorbing pollution and the rapid reduction of creepage distance (in a limited time period), have reduced transformer disconnection severely as a result of earth fault. Additionally, they are costly to be washed regularly. Therefore, using intelligent materials in designing bushing can increase the reliability of network and consequently reduction of costs. In this regard, this paper investigates the use of silicon bushings in the distribution systems and proposes operational ideas for the optimal operation of these devices in the polluted areas. The sample bushing was evaluated based on the IEC60137 standard test.
Highlights
Bushings are a critical component in electricity transportation
In the studies done on the insulators located in the tropical areas using the monitoring of breakdown current and measurement of ESDD-NSDD, useful criteria were found for choosing the appropriate distribution insulators in the beach areas
The amount of breakdown current of insulators in the polluted areas is as the result of surface pollution of the insulators, and it is related with the creepage distance of these devices [9]-[11]
Summary
Bushings are a critical component in electricity transportation. They are used in substation buildings, transfor-. The different potential surfaces on the two sides of this equipment make specific features electrically for this equipment Some of these features are: insulation level, creepage distance, withstanding the impulse wave, etc. In the last two decades, the silicon insulators have replaced the ceramic insulators suitably. The especial hydrophobicity quality of silicon insulators is the main reason of their successful performance at beach areas. This event results in small variation of the breakdown current (because of high humidity) during the day at these areas [4]-[8]. The amount of breakdown current of insulators in the polluted areas is as the result of surface pollution of the insulators, and it is related with the creepage distance of these devices [9]-[11]. After several years and visiting the deficiencies of the ceramic insulators they were replaced with silicon insulators
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
