I am looking for an enterprise to develop a excitation system Mathematical based on the wiring diagram, used to study the behavior of the synchronous machine with the excitation system and the power system.
Dear colleagues,
I try to answer us:
David: The STD were brought up, twenty years ago, every year the Maintenance Dpt. test it to ensure that works correctly, in other case replace it for a new one.
David&Ralph: I can't use the www.tinypic.com that show the FAQ238-1161, my server filter some...
Thanks to for your help, but the point its that we are going to replace the STD electromechanical relay for a new digital, with the new features, instructions the circuit have been working for twenty years and it works correctly until now that it have had spurious trip, concerned to your help...
Thanks David but it is not the case, the relay is a STD manufactured by GE and not show this conection. If you want I can try to send oneline diagram.
Anayway thank you so much
Yes I mean the zero-secuence, and I am agree with you that the actual transformer differential relay have this feature to compensate this component when one of the transformers side is conected to ground. The point is that now we must replace a very old GE design to compensate this zero-secuence...
Hi colleagues,
Actually we have a 3 bank power transformer with the following data sheets:
3 x 420 +-2.5+-5% kV / 20 kV
YNd11
3x420MVA - OF AF
The 87TG protection has conected an old design (dated from 1970) to compensate the homopolar component in the low voltage side, that include three CT...
