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How to select the proper fuse rated current for my transformer protection by RM6 switch-fuse unit?

Below selection table gives the fuse rated current based on network (service) voltage and transformer rated power:

Important notes:

Correct operation of the RM6 is not guaranteed when using fuses from other manufacturers,
Fuse rating given in A, no overload, – 25°C < Temperature < 40°C),
Fuse type considers: Fusarc CF and SIBA (1) (General case, IEC 60282-1 standard, IEC 62271-105 (to replace IEC 60420) and DIN 43625 standard),

Fuses dimensions (Fusarc CF):