IEC 60038:1983 Voltage Range

International Standard IEC 60038:1983 defines a set of standard voltages for use in low voltage and high voltage AC and DC electricity supply systems.

Low voltage

Where two voltages are given below separated by “/”, the first is the root-mean-square voltage between a phase and the neutral connector, whereas the second is the corresponding root-mean-square voltage between two phases (exception: the category shown below called “One Phase”, where 240 V is the root-mean-square voltage between the two legs of a split phase). The three-phase voltages are for use in either four-wire (with neutral) or three-wire (without neutral) systems.

Three-phase 50 Hz

• 230 V / 400 V (formerly 220/380 V)

• 400 V / 690 V (formerly 380/660 V)

• 1000 V phase to phase (3 wire)

Suppliers using 220 V / 380 V or 240 V / 415 V systems were expected by the standard to migrate to the recommended value of 230 V / 400 V by the year 2003. This migration has already been largely completed, at least within the European Union.

Voltage conversion schedule

Three-phase 60 Hz

• 120 V / 208 V

• 240 V

• 277 V / 480 V

• 480 V

• 347 V / 600 V

• 600 V / 1000 V

One-phase, three-wire 60 Hz (American split-phase)

120 V / 240 V

Medium voltage

As per International Standard IEC 60038:1983, nominal voltages are above 1 kV and not exceeding 35 kV.

There are two series, one from 3 kV up to 35 kV and another one from 4.16 kV up to 34.5 kV.

High voltage

As per International Standard IEC 60038:1983, nominal voltages are above 35 kV and not exceeding 230 kV.

Extra-high voltage

As per International Standard IEC 60038:1983, the highest voltage for equipment is the characteristic value exceeding 245 kV. The enumeration begins at 300 kV and ends with 1200 kV.

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