Hi All,
Sorry, but I had to switch JB off again this morning. At approx., 10:30 am.
It appeared to be not quite right when I checked it at around 9:30, so I decided that a trip to the site was called for.
Upon inspection, one of the two 12 volt 135 AH batteries, that are connected in series, to produce the primary 24 volt d.c. supply, was basically dead. The on load terminal voltage, was down at 5.3 volts ! Probably un-recoverable now. The other battery was at 9.9 volts.
I have therefore switched everything off. Although I have left the turbine, which was turning a slow but steady rate, connected to the batteries, while I attempt to resolve the situation.
The only comment I would pass at this time is that in every case, so far, where we have had trouble with the 24 volt supply, irrespective of the type of battery that has been installed, it has been the lower battery, i.e. the one sitting with the negative terminal at zero volts, that has discharged faster than the other. i.e. the battery who's negative terminal has been sat at the 12 volt level.
The only other comment I would make is that we did not have so much trouble, in this respect, when the 24 volts capacity was made up of a series / parallel network, of lower capacity batteries.
Anyone any ideas ?
So until I can get the combined intelligence of the Technical Team to resolve the problem, this could be on going for a while.
I will try to have something sorted on a temporary basis, tomorrow (Sunday 24th July), but no promises.
73's Dave, G3ZXX
