While laboratory and field pollution withstand for porcelain and glass insulators is a function only of insulator set geometry, in the case of polymeric insulators this will vary with surface condition and hydrophobicity level. Read More >
Dr. Konstantin Papailiou looks at the future of overhead lines. Read More >
Most grid assets wear due to mechanisms driven by temperature, electromagnetic field, mechanical forces, vandalism as well as conditions such as salt fog and acidity. Read More >
Replacement or retrofit of medium voltage bushings is common practice after decades operating a power transformer. Read More >
IEC 60815-3, intended for dimensioning polymeric insulators under polluted conditions, allows for the option that testing HTM insulators could require investigation under both hydrophilic and hydrophobic states. Read More >
Shield wires on transmission lines combined with good earthing assure lightning performance but can themselves become a liability if they ice up and sag or gallop, leading to risk of flashover between them and phase conductors below. Read More >
Application of silicone composite insulators has increased significantly over the past 30 years and one of the key factors behind continued growth will be the confidence shown in them by power utilities. Read More >
It is important for surge arrester standards to be developed and continuously maintained to keep pace with ongoing developments and expectations within the electrical industry in terms of providing secure overvoltage protection. Read More >
Whenever a power transformer’s neutral is grounded through impedance that can be resistive or inductive or even ungrounded, it is important to protect the neutral terminal from surges that can be transferred through the transformer. Read More >
Modern technology in signal acquisition and analysis techniques has provided new tools for transformer diagnostics. Read More >
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