I have an installation here that powers a 75 KVA transformer with 60A Time delay fuses The run to the transformer is long, more than 100 meters. 60 Amp fuses were chosen because the secondary powers a 200 amp panel and there is no secondary OC protection so 60 A was the biggest fuse that could match without another OC device on the secondary or a 225 amp panel. They have been operating for about 2 1/2 years without an inrush failure on these fuses. I do think the impedance of the run helps too