Hi Bob,
>are you certain you are still spinning the generator at the same speed that it ran at prior to the failure?
that's certain, indicated by frequency sensor at axle
>is the output voltage and hz still the same as before?
also adjusted and confirmed to values as before
>some drop in hz because of reduction in speed might explain a loss of capacity?
the hydro-side is fix, I adjust Hz (and thus GEN speed) via load controller
>also the generator will only deliver the amount of watts that the load requires, is the load the same as before?
the electronic load controller monitors Hz and uses excess resistances to burn all necessary to remain at selected Hz
>how do you know if it is the same?
if the load controller keeps the GEN at 50 Hz, it must burn all the current. At this balanced state, I measure V and A on the 3 phases coming from GEN. These values are not as before, i.e. 800 w less.
>any more info? is this a 50hz, 60hz AC machine, from your post i assume a 50 hz at 1500rpm?
The GEN can be used 50-60Hz, I have set the controller to keep it at 50, ie 1500 rpm
>is the strainer on the upper end of the penstock, feedwater intake clear? if it is partially clogged with tree's or a beaver dam, maybe that would limit the output power.
correct, but that I have checked and is ok. Intake and jet are ok, I cannot check insides of 400 yrds of 4 inch pipe, but I cannot imagine that s.t. got into pipe and partially clog 4 inch space, when jet is ½ inch. The first intake rack is with 1/2 inch spaces, second rack with even less.
>basically, turbine undamaged, governor bypass working properly,
turbine fine, there is no gov bypass
>800watts will make a lot of heat,
that's is still the mystery