Rectifiers are designed to work on 415 V AC 3 ph. 50 Hz. supply and suitable for an input range of 360 V to 460 V AC 3Ph. Units of very small capacities namely 8 V / 12 V / 16 V / 20 V & 24 V DC up to 100 Amps ratings can also be supplied to work on an input voltage of 240 V AC 1 ph. 50Hz. supply.