The IEC’s first Guide for selecting insulators with respect to pollution in was published 1986 and standardized the concept of creepage distance. Although the Guide quickly found application due to its simplicity, field experience did not always prove successful.

Silicone coatings have traditionally been applied mainly to mitigate insulator contamination problems at substations but the past 25 years have seen their application to overhead lines grow significantly. As this process evolved, coating line insulators moved progressively from something performed mostly in the field to industrial scale application in specialized factories to allow for greater consistency, reliability and economy.

The technology group Wärtsilä and Gabon Power Company (GPC), the subsidiary of the Sovereign Fund of the Gabonese Republic (FGIS) dedicated to energy and water, have signed a concession agreement with the Government of Gabon for the development, supply, construction, operation and maintenance of a 120 MW gas power plant

The African Development Bank (AfDB) has approved a loan of US$42.9mn to finance the second phase of a major power transmission and interconnection project in Madagascar

The butterfly insulators and pin insulators in ceramic insulator products are mainly used for high and low voltage transmission lines, and suspension insulators are used for high voltage transmission lines.

The performance of overhead line insulation in DC differs from AC due to ionization of airborne particles resulting from the unidirectional electric field.