One of the benefits of incorporating a starter into a MCC is that the common resources are centralised.
The 110Vac control voltage required for each starter is derived from a transformer and distributed to each compartment of each cubicle.
The SCADA system in each compartment is powered by a 24Vdc bus system that is powered by dc to dc converters that supply a stabilised dc power supply to the SCADA system. The supply to the dc to dc power converters is derived from batteries, this is to ensure that the SCADA system is operative during power failures.
Where the MCC is part of a switchboard there are additional 48Vdc bus systems for circuit breaker protection, control and operating mechanisms.
Within each MCC there is also a SCADA ring system that takes the compartmental SCADA ethernet signals onto the MCC ring via ethernet switches. The MCC SCADA ring has a N+1 coupling to the MCC primary ring. The MCC SCADA ring system is powered by a dual 24Vdc bus system configured as N+1 that is powered by dc to dc converters that supply a stabilised dc power supply to the MCC SCADA ring system, this is to ensure that the SCADA network system has no single point of failure. The supply to the dc to dc power converters is derived from batteries, this is to ensure that the SCADA system is operative during power failures, including a dc to dc power converter failure.