I have also seen this overvoltage effect in our plant. In our case we have an IT configuraction. A phase to ground fault, while starting a "big" motor, was creating the same problem you are having.
What you can see are just the I/O pins of a function block defined by the user.
Somewhere in the code you should find that block definition, including all commands used for this particular block
We installed DURESCA bus duct for our new cogeneration planta last year. Step up transformer is 65 MVA 11,5 kV generator side.
I´ll try to find some information ant post it.
Hi Comaqc
There is something that sounds familiar to me. Here in Spain, our plant is a paper mill, we have a CALCOIL system used for heating paper rolls.
We have experienced several problems with these actuators after the annual paper mill suthdown this year.
i will check our configuration, I...