The light-overload rating at 15 kW / 30.5 A is effectively the same as normal duty here; the real distinction is between the 32 A and 25 A current limits. If your motor plate says 30 A FLA, the normal-duty 32 A gives you headroom; if you need sustained overload capability, size to the 25 A heavy-duty line.
Frame size R4 dictates a specific DIN-rail or backplate footprint — verify the mounting hole pattern against your cabinet layout before cutting the gland plate. The 47.5-63 Hz input frequency range covers 50/60 Hz grids globally, but the drive's DC bus capacitors are sized for that range; running below 47.5 Hz on the AC input side isn't supported.