Siemens presented the new series of arc-fault protection devices 7XG31. The new series includes 7XG3124 RA24 device which is capable of transmitting GOOSE messages on detection of arc-faults in different compartments of enclosed switchgear. It is possible to connect up to 16 optical arc-fault sensors (7XG3130 RA30) to RA24 device.
RA 24 can be equipped either with one 100Base-TX (UTP) (for configuration and GOOSE communications) or with 100Base-TX and 100Base-FX interfaces simultaneously (in this case one interface is used for configuration purposes and another – for GOOSE communications). RA24 information model includes SARC logical nodes, number of which corresponds to the number of connected arc-fault sensors.