Dear Vladimir,

I made two simulations, except the volt dop the results was quite the same.

Into the first one I assumed the all busbar phases has the same length [30 m]

Into the second on ( attached ) I assumed that the whole routing, 30 m is splitted into 7 parts 4.3m each, connected in series ( see picture 1a ).

The length 4.3 is more or less the distance from the busbar leads ( see picture 2a).

Into the picture 3 is represented what I taken from the field in term of ampacity.

e.g. 1_ E4_r1, is:

1: first busbar

E4: load terminal

r1: phase connected to the open triangle transformer ( open triangle I considered 6 phases )

The busbar 1 and the busbar 6 are connected in parallel.

I measured:

    522 A into the busbar 1
     508 A into the busbar 6

 

QF simulation shows that:

 

    471A into the busbar 1
    565 A into the busbar 6

 

 

Doesn’t matter about the value but the strange fact that is the external busbar [1] has les current that the internal one [6].

Moreover the unbalance is 27% instead the 3%.

 

Could we arrange the short meeting just to understand if I did correctly ?

 

Many thanks in advance.

 

Ivan