Hello guys, I have to make a short circuit calculation for school but I am a bit lost.. I have a copy off the IEC61363 and internet connection as my help lines. 1. The problem statement, all variables and given/known data The network consists of a generator feeding to switchboard A with a cable in between, on the same switchboard is a motor connected with another cable and there is a transformer connected to the switchboard (see image in attached file). There are also other motors on the switchboard but they can’t feed into the short circuit. I have marked the points where I want to calculate the short circuit current in the image in the attached file. 2. Relevant equations I have no idea how I am going to put all those calculations in here, I've read the guidelines but I have to put this in a word document or else nobody is going to make sense of it anyway. In the file are the equations I used to calculate what I've done so far. 3. The attempt at a solution I have calculated the following things: Generator has a peak current of 28.5kA Motor has peak current of 8.2kA calculations in attached file. The 25 meter cable has R=0.206 and X=0.075 per 1000 meters and have 8 conductors in parallel per phase. For 25m this is R=0.00515 and X=0.001875 The 10 meter cable has R=0.206 and X=0.075 per 1000 meters and have 5 conductors in parallel per phase. For 10m this is R=0.00206 and X=0.000750 The 22 meter cable has R=0.206 and X=0.075 per 1000 meters and have 1 conductors in parallel per phase. For 22m this is R=0.004532 and X=0.00165 I assume I have to divide the R and X of each cable by the number of conductors in parallel. I have tried adding the resistance and reactance of the 25 meter cable to the generators Ra and Xd (I thought I might be able to do this because the cable is parallel with the generator) but the answer I got wasn’t even close to the answer I got with my simulation software (SKM PowerToolsforWindows). The peak current off generator and cable is 27136A When I turn on the motor the peak current is 35218A The current at the transformers secondary’s with both generator and motor on is 5972A. The answer I got for the generator and cable with hand calculation is 28.4k just a smudge less then without the cable.. What is given about the transformer: 3 phase, S=125kVA, Uprim=690V, Usec=400V, Isec=180,5A, Uk=4%, F=50Hz. I have also calculated the R and X of the transformer (calculation in attached file). The Rt=0,03 and the Xt=0,149 but same deal as with the cables I do not know how to go on nor can I find it on the internet. When I started with this problem I thought I’ll have it done in under 1 hour but I was very wrong, I’m not even been able to solve it on my own so far. The calculations of the transformer, generator and motor are in the attached file. EDIT: I had been looking for the format for 'how to make a post' in this section for about 10 minutes, when I decided not to go by the format I found it when I opened the window for making a new thread.