Abstract
The capacitors of series compensation (SC) installations have to be protected against overvoltages by surge arresters. Since very high amounts of energy must be handled under fault conditions, many parallel metal-oxide (MO) resistor columns are typically arranged in arrester banks, which are also designated as metal-oxide varistors (MOVs). It is known that in rare cases, single MO resistor columns fail in consequence of excessive energy injection. It is so far an unsolved question as to whether it is allowed to replace such arresters by new ones because of possible electrical aging effects of the remaining, healthy arresters. The presented investigations indicate that the aging affects do have an impact on the residual voltage of the investigated MO resistors, but with only negligible impact on current sharing among individual columns (e.g., of a bank). Therefore, the replacement of single arresters seems to be possible at least for the investigated type of MO resistors.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
