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Dear sir,
I am working in CPP with 750 MW power generation capacity. There are 6 gas turbine generators. GT MCC of all the generators has 240 V AC for control circuit and 125 V DC for indication circuit. (10 modules have 4 electronic circuits with 4 LEDs.) So my question is, what are the reasons for having two different supplies for control and indication circuit?
I am working in CPP with 750 MW power generation capacity. There are 6 gas turbine generators. GT MCC of all the generators has 240 V AC for control circuit and 125 V DC for indication circuit. (10 modules have 4 electronic circuits with 4 LEDs.) So my question is, what are the reasons for having two different supplies for control and indication circuit?