Thanks, Byrdj, your right the IV valves will try and control speed in a pre emergency overspeed situation but I forget to add that this mark vi control system is for a G.E. reverse flow turbine we roll up and load the unit to approx 30% megawatt load on the intercept valves then place the...
Thanks. the relay was check and is OK but it is interesting you mentioned the wiring to the relay I don't think that has been checked how would we do that? OH and seimens did give a rec they want to sell us a new generator. the unit is off line for an economy outage but when we were running we...
I am an operator but I will try and explain how the electricans tested the CT'S They applied voltage [800V] from the wiring from the control room to the CT'S and checked miliampreges they said to test the CT'S they would have to remove them [big job] We also rolled the wires from one set of CT"S...
If the turbine is dissconnected from the load it was carring the steam admission valves should close at a predetermined turbine speed value to prevent an destructive overspeed condition
We have a large westinghouse generator [530 megawatts] that is tripping on current unbalance when we ramp the megawatt load to quickly the relay is set at 1000 amps we have checked the CT'S they seem ok. The generator would not high pot during an outage but ran after the outage until this...
We have retrofitted 2 300 mw ge turbines to reverse flow turbines with a bypass system, and only got the old SALI charts for a foward flow turbine fron GE, IE:The predicted steam block calculates steam temp after the stop valve bypass and nozzle blocks wereas we roll on the intercepts,Does...
