10kva three phase site transformers

[quickspark]

Hi Folks,
we building 6 storey block of flats and need a quite few 30 units of 10kva transformers connecting up to the mains. At the moment we have five trafo on 32A type C braker and that gives us a proper headache with its nusianse tripping, even without any load. Can anybody tell us how many maximum trafo we can have on one 32A breaker?
Many Thanks in advance.

 

[Darkwood]

having 10kva transformers on a 32a type c breaker will invariably cause nuisance tripping, as a guide type c mcb's allow for inrush on motors or small transformers but a type d would be better for the inrush of a large 110 transformer, if more than one is plugged into the ring then i suggest switching the transformers on one at a time as the combined inrush of more than one trnsformer would be a feat for even a type d breaker.
Once you've switched each transformer on seperately the no' allowed on a 32a breaker is all dependent on the load they demand as unloaded they use little current while energised.

 

[thepurple1]

I seem to remember from my college days that the the transformer VA rating is divided by the secondry windings, as a rule of thumb but there is a mathmatical way of working it out but i cant rember it.
so 10,000/240=41.6 amps