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Fault in the excitation system of the Mark 6 Simplex model unit. The unit is synchronous and at full load. Suddenly the unit is unloaded with the following alarms and the excitation system is removed. Does anyone have any information on this?

The island mode off but i connect the large infinite grid.The requested trend points will be sent.

Units frame 6 mark vl

Units frame 6 mark Vl

Sometimes the unit fluctuates in the preselected mode and the control voltage and gas fuel of the unit fluctuates, and this fluctuation causes pressure fluctuations between Gcv, SRV, and GCV itself, and exactly 72 minutes after the start of the fluctuation, the unit returns to normal. So that...