The FAS-115dg synchroniser is appllied synchronization of a generator to the busbar and shutting of its electrical switch when the voltage distinction, the slip recurrence and the phase angles are within the preset limits. The uni-line synchroniser might be connected in conjunction with an extensive variety of prime movers, as its control beats may be set to fit a few sorts from gradually responding diesel motors to quickly responding gas turbines. In addition, this synchroniser offers voltage-matching.