What would the ocpd be on the secondary side of a 3 phase 30 kva 480D to a 120/208W dry type transformer be in a commercial building? Could you give the min to max amp rating if there is one and if it supposed to be rated at more or less than 125%

Clint,

Your question has the appearance of a homework assignment. You need to do your work and we will review it for you.

Also, this primarily a DIY site so commercial work is an exception, not rule.