ABB ARC GUARD SYSTEM™ - TVOC-2 15—ConfigurationCurrent condition configurationNormal trip configuration with additional current conditionA current condition is an option that could be used to avoid the risk of nuisance tripping due to strong light from other sources than arcs. The main risks are light from arc chutes and direct sunlight, which in normal cases can be avoided. There-fore the standard configuration is without CSUs (Current Sensing Units).All trip configurations on page 12 can be combined with an additional current condition. It is possible to connect up to two CSUs directly to the Arc monitor (AM) (input 21 and 22). To connect additional current sensing units in series is also possible if required. To share the current condition between different Arc monitors can be done by connecting output 23 on the first Arc monitor to the standard CSU input on the other. The Arc monitor will then block the trip condition until it sees an over current.AM (Arc monitor)Special trip configuration depending on over currentThe arc monitor has a special trip configuration that determines trips depending on where it sees the over current. This con-figuration will then trip different breakers depending on which supply is showing an over current.DIP switches 1, 2, 3 and 4 to position ONSee manual for more details
