Replace the sentences: These supplementary requirements apply to fuse-links for protecting PV strings and PV arrays in equipment for circuits of nominal voltages up to 1 500 V d.c. Their rated voltage may be up to 1 500 V d.c. By: These supplementary requirements apply to fuse-links for protecting PV strings and PV arrays in 12 equipment for circuits of nominal voltages up to 1 500 V d.c., and also, in so far as they are applicable, for circuits of higher nominal voltages.