Performance of multi-column MOVs for C class protection of AC power circuits

High voltage protection for low voltage AC power circuits is very important to minimize the damage of electrical equipment. Unfortunately, review of performance and safety features in commercially-available surge suppressors has shown that sometimes they cannot deliver the proper protection to withstand the high voltage surges. This paper reviews the performance of multi-column surge suppressors. Metal oxide varistors (MOVs) are used as the test objects of this. Some configurations of MOVs have been tested to show the difference in protection capabilities. Experiments involving a wide range of high voltage surges revealed that a multi-column MOVs provides increased in peak current and energy-handling capabilities for a given application.