Insulators for pretty significant voltages, exceeding two hundred kV, might have grading rings installed at their terminals. This enhances the electrical discipline distribution across the insulator and makes it much more resistant to flash-more than during voltage surges. Substantial- and medium-voltage power lines in Łomża, Poland Overhead power transmission lines https://spencerijkig.bligblogging.com/30422191/5-tips-about-best-surround-sound-system-you-can-use-today