... (33, 36, 40.5) Highest voltage for equipment 40.5 kV (Rated insulation level) 40.5/95/200 kV Rated frequency 50 or ... 60 Hz (Rated primary current) 5 ~ ... 2×1000 A (Rated secondary current) 1 or 5 A Accuracy class for protective cores 5P, 10P, ... limit factor 15, 20, 30, 40 Accuracy class for measuring cores 0.5, 0.2, 0.5S, 0 ...