The primary breaker seems small. The primary fla should be 180 amps and protection could be as much as 250% of this per Table 450-3(b). It may be more cost effective to provide 2 225 amp breakers on the secondary at the transforemer in place of the 400 amp fused disconnect and the 225 amp main breakers in the panels. The secondary of the transfromer will require a grounding electrode system per 250-30(a)(3). The common grounding grid may not meet this requirement.
Don(resqcapt19)
