Complete system solution from ComAp - 2x InteliSys controllers + PLC, controlling the bus tie breaker. The system is used to backup the control room and auxiliaries of a coal power station (4x 250 MW). InteliSys controllers control the two stand-by engines in island and in parallel with mains (after mains comes back, InteliSys provides reverse no-break transfer). The PLC provides the BTB control to interconnect the feeders in case that one of the engines fails.