The 32 volt fuse rating is fine; it represents the max working voltage of the fuse. The current rating is the critical value, and yours was fine. It was probably cooked by an intermittent short.

The other fuses are 10 and 15 amp rating. "ACG" is the Bussman designation for a 1/4" x 1 1/4" glass tube fast-blo fuse; I believe 32v is the standard voltage rating for this type. The number represents the current rating, so you have 10 and 15 amp values (but I think they were reversed, and the one in the 50v circuit was probably under spec'ed if it is a standard 32v ACG type).

(Edit because I didn't see at first that your blown fuse is a slo-blo - the coiled fuse element identifies this.). The best approach is to see if the schematics specifiy which type, otherwise stick with slo-blo. Slo-blo fuses delay blowing by a slight amount in order to accommodate the brief current spikes which are inherent in some types of circuits such as switching on coils. A fast-blo fuse replacing a slo-blo will not cause any harm but can nuisance blow during normal operation. On the other hand, a slo-blo should never be substituted for a fast-blo, as the delay in melting can cause circuit damage.

Those are common values, but you will probably need to go to a hardware or electrical supply store to find slo-blo types as well as ones with sufficient voltage ratings for the 50v circuit.