Salient features available in single phase two wire & three phase four wire.universal auxiliary supply 80 to 300v acdc.push button based site programming of pt ratio.bright 4 digit 14mm led display.colour indication for r, y, & b phases (for 3 phase meter).same model for v & kv.auto scroll facility & scroll lock facility (for 3 phase meter).network selection for star (3 phase 4 wire) and delta (3 phase 3 wire) (for 3 phase meter).pt primary selectable : 110v, 1.1kv, 6.6kv, 11kv, 33kv, 66kv, 132kv, 220kv, & 440kv.pt secondary fixed : 110v.available in class accuracy 1.0 & 0.5