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An update: My AVR/Exciter has a can connection. It would be useful to be able to connect that to the plc. It comes with a bunch of safety options and cos phy control.

Besides that, I am not familiar with profibus and the likes. To be honest, I have no idea how to go about this. Never heard of sercos. If I knew what these were, I probably didn't need help. I don't mean to sound unkind. I really apreciate any help I can get. The reality is that I have never...

Another question: The runner blades are adjusted by a cylinder that is integral to the turbine shaft. The rotary union is on top of the piston. This is practical, but there is no way for me to know the position of the piston and/or the runner blades during operation. I have a way to bring out...

I take it you mean the price of the sensors. Unfortunately, I think there is no way around them. I have been looking at 4-20 mA ultrasonic sensors for water level measurement. First quote was 369 euros each. Found another company that sells them for 180 or so. Still have to look into position...

@rob, No problem. I am working abroad myself at the moment and I still have time. I can always control the system manually and install the control system later. Dig signals are 24 V. I will look into the sensors later. Most probably 4-20 mA. @Sidewinder I planned a relay between the grid...

Now, the operation should look something like this: Now, I am not sure how often we will need the Off grid modes. That depends on future rules, regulations and taxes regarding power generation. In any case, the system should be capable of doing this. Also, I would like to run a cable from the...

This is basically what the system looks like.

Sorry for the format, it was copied from an excel sheet. I probably need a couple more for future use, or in case I have forgotten something. List of signals:      # Name FunctionType in/out    1 Upper waterlevel before grid ? in    2 Upper waterlevel after grid ? in    3 Lower water level...

Hi Rob, I don't want a second PLC for safety. To be honest, the only thing that can go wrong is that the generator overspeeds in island mode, or that the main breaker does not switch off in case of a power failure. Let me make a list of all the IO signals and write a sequence of events. If...

I already have a hydraulic unit, valves, cylinders and so on to control the wicket gates and runner blades. I only need a PLC that can do what I want and a bunch of sensors. These are not cheap, especially the ones for water level. The most expensive part, believe it or not, was the rotary...

Hi, yes that would make sense, but I am not too concerned about the generator part of the setup. I have a large AVR that is capable of delivering full excitation current, so I am planning to use that in stead of the built in exciter. The AVR comes with a set of controls and safeties for...

Hi, We have a Francis hydro turbine driving an asynchronous generator. The wicket gates are manual and there is really no control. We open the wicket gates, the turbine starts running and at approximate synchronous speed, we switch the generator on the grid. After that we keep the upper water...

These three machines are mechanically connected with couplings. Anyone here that has ten of these kicking about, can tell us what it is and what it was used for?

Another machine that we bought recently. I bought it off a very bad picture as an induction motor. I noticed however that the stator arrangement was adjustable and that does not make sense in any induction machine. Upon arrival it turned out to be a synchronous generator. At first I thought it...

For most of the generators I have the original field rheostats. As the AVR's are connected in series with those, so I don't expect too much trouble. They don't need to adjust over a wide range, since most of the generators we have are way too big for any load I can think of. (35, 40, 60 and 125...

Hi, No, we don't have the generator with it. The unit came from a museum and I don't know where they got it. We have a couple of generators with a separate exciter. I was planning to make excitation bus bars in the main switch board and connect several different voltage regulators that can be...

Yeah, same here. A few books that deal with Tirrill regulators, but not this one. I have three Tirrill regulators and they are all different. (This one, a Max Fuß and an Oerlinkon) I have been thinking the insulation might be asbestos. I will keep it as is. It is such a nice job and if you...

Better view of the internals:

Hi Toni, Yes a generator AVR. The resistors are behind the back panel. Hubert