Utility Pole Mounted Wye Bank Transformers

[HPS]

If we want a 480v 3 phase 400amp service created from a Utility Pole Mounted "Wye Bank", what size KVA Transformers per phase would be used on the pole?

 

[Ingenieur]

If we want a 480v 3 phase 400amp service created from a Utility Pole Mounted "Wye Bank", what size KVA Transformers per phase would be used on the pole?

Sized ~110 kva
the next std sizes are 100 and 167
they seldom oversize so the 167 is out
so 100 is closest
but I'm guessing 3 x 75 kva depending on load profile

 

[kwired]

Most utilities are going to be more concerned with what your load profile looks like then the setting of the overcurrent device.

If you have 400 amp overcurrent device but only 250 amps of load (that runs continuously for certain time period) they likley will not put in more then a 225 kVA bank, composed of 75 kVA single phase transformers. If you have short periods of higher load, they may still go with the 225 figuring it has time to cool between peak loads. If future load is expected, they may go larger right away though.