Three-phase electric power (industrial applications only) CountryThree-phase voltage (volts)Frequency (hertz)Australia400 V (officially, but in practice often 415 V)50 HzAustria400 V50 HzAzerbaijan380 V50 HzAzores400 V50 HzComplete list: Three-phase electric power (voltages/frequencies) www.worldstandards.eu › electricity › three-phase-electric-power