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Because of several advantages over traditional ceramic insulators, polymeric insulators are
gaining popularity in electrical power transmission and distribution systems as outdoor insulation.
However, being organic in nature, these insulators degrade in outdoor environment and their lifeexpectancy needs to be assessed in the environment prevailing at potential sites of outdoor
installation. For first ever study of polymeric insulators in Pakistan, HTV-SiR insulators, having
promising credentials internationally, were chosen to undergo assessment in the simulated
environment representing Pakistani conditions. Aging of these insulators was investigated under
varying level of UV radiations and pollution to reproduce Pakistani conditions prevalent in different
regions. Because of some practical consideration, the aging study was conducted at low-pressure
conditions to simulate high altitude applications. The aged samples were analyzed using ATR-FTIR
spectroscopy, SEM, hydrophobicity tests and through physical observations. The study revealed that,
though these insulators experienced more degradation at low pressure but still maintained acceptable
performance.
Muhammad Amin, Mohammad Akbar. (2012) Performance of HTV SiRas Outdoor insulation at High Altitudes, Pakistan Journal of Engineering and Applied Sciences, Volume 11, Issue 1 .
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