The next seven schematics demonstrate a process to reflect the sequence of events that occur in a selected Business Critical centre in the event that there is a loss of one of the electrical supplies, in this case it is one of four 11,000 volt incomers, the process demonstrates the automatic operation that initiates the standby generation to run up to speed and support the buildings critical load, it also demonstrates the synchronisation of the generator (s) with the national grids local 11,000 volt supply. Finally the process demonstrates the return of the national grid electrical supply and the run down of the generator supply. The system being deployed to control the switching sequences is known as a SCADA system which is a PLC (Programmable Logic Controller).
IST 2010 7.1 MAINS 1 LOCKOUT MAINS 2 FAILURE SB5G FAILURE
PLEASE CLICK ON THE PAGE(S) TO EXPAND THE IMAGE(S) – TO FULLY EXPAND CLICK ON CROSS IN TOP RIGHT HAND CORNER.