The tables take into account:
b The type of protection: circuit-breakers or fuses
b Operating-current settings
b Cross-sectional area of phase conductors and protective conductors
b Type of system earthing (see Fig. F49 page F29)
b Type of circuit-breaker (i.e. B, C or D)(1)
The tables may be used for 230/400 V systems.
Equivalent tables for protection by Compact and Multi 9 circuit-breakers (Merlin
Gerin) are included in the relevant catalogues.