In South Africa’s vast mountainous terrains, some transmission towers can be exposed to as many as 16 lightning strikes/ sq. km/year, leading to a high number of flashovers and power interruptions. Therefore, one of the largest transmission and distribution utilities in the country has deployed Hitachi ABB Power Grids PEXLINK solution.
The solution includes the installation of line surge arresters that act as protection layers from such flashovers. The installation process of Hitachi ABB Power Grids'' line surge arresters is quick and easy, requiring no special tools. Currently, 317 surge arresters from ABB have been installed on 146 transmission line towers in the network.
With the PEXLINK concept, the utility aims to bring down the number of line faults. They are also able to build more robust protection of the line that enables constant, uninterrupted power supply to the consumer.
|Year of installation||2015|
|Type of product||PQC-STATCON|
|Number of cubicles||6 to 8 per substation|
|Network voltage||415 V|
|Power||250 kvar per cubicle|