I need some help regarding the transformer in the battery charger unit. The lightning struck my house, and sadly the mobile home was connected to 230V outlet. Among other things that needed to be repaired or replaced in the house I have noticed that my batteries in the mobile home are not chraging.
After quick inspection I have found a fuse than was blown out. I have replaced the fuse but as soon as I connect charger to the 230V outlet the fuse blows out. I guess there is a short circuit in the transformer ? I did quite a lot of project with microcontrolers and stuf like that, but I only know basic principles how transformers work.
The unit is EBL 264-3 it has 12V logic. (Picture is for the 264-7 model but the specifications are practicly the same)
So, I guess the transformer is 230V - 12V, why are there 3 output wires ?
Here are a couple of pictures, as you were interested where the output wires go.
Marked wires : 
Two wires (D,E) are going directly to the circuit on the right (I presume D is ground and E is +12). On the board is connected to the bridge rectifier (B40C800). By the looks of it, this is the board that switches things on and off from the control panel (couple of relays and so on). This is probably the power for the realy switching. (B40C800 - output current 0.8A, I guess ? )
The recomended input voltage for B40C800 is 40V. is there anyway I could figure it out how much was the transformers output ?
Picture of the circuit board above the transformer :
I have removed the transformer from the box :
I have found the scheme of the battery charger (the resolution is low, but this is directly from the manufacturer's site)
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