Notes

Voltage Levels to IEC 60038 

By on

The standard aims to consolidate AC and traction voltages within the industry and defines the following bands:

  • band 1 - A.C. systems 100 V to 1000 V
  • band 2 - A.C and D.C traction systems
  • band 3 - A.C. systems above 1 kV to 35 kV
  • band 4 - A.C. systems above 35 kV to 230 kV
  • band 5 - A.C. systems above 245 kV

A.C. systems 100 V to 1000 V

Nominal Voltage, V
Three-phase four-wire or three-wire systems Single-phase three-wire systems
50 Hz 60 Hz 60 Hz
- 208/120 240/120
- 240 -
400/230 4808/277 -
690/400 480 -
- 600/347 -
1000 600 -

Supply voltage range ±10 % at the supply terminals
Supply terminal to final equipment maximum 4% voltage drop

A.C and D.C traction systems

Voltage, V
Lowest Nominal Highest Frequency
D.C. Systems
(400) (600) (720)
500 750 900
1000 1500 1600
2000 3000 3600
A.C. Single Phase Systems
(4750) (6250) (6900) 50 or 60
12000 15000 17250 16 2/3
19000 25000 27500 50 or 60

Bracketed are non preferred and should not be used if possible

A.C. systems above 1 kV to 35 kV

Voltage, kV
Series I Series 2
Highest Nominal Highest Nominal
3.6 3.3 3 4.40 4.16
7.2 6.6 6
12 11 10
13.2 12.47
13.97 13.2
14.52 13.8
(17.5) (15)
24 22 20
26.47 24.94
36 33
36.5 34.5
40.5 35

 It is recommended that only one series be used.

A.C. systems above 35 kV to 230 kV

Voltage, kV
Highest Nominal Voltage, V
(52) (45)
7.25 66 69
123 110 115
145 132 138
(170) (150)
245 220 230

Only one series should be used in each country

A.C. systems above 245 kV

Recommended in each geographical group only one of the following be used:

  • 245 kV - 300 kV - 262 kV
  • 362 kV - 420 kV
  • 420 kV 550 kV

 

Highest Voltage, kV
(300)
362
420
550
800
1050
1200
, , , , ,

More interesting Notes:
Steven McFadyen's avatar Steven McFadyen

Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author

myElectrical Engineering

comments powered by Disqus

Electrical Engineering

Electrical engineering is a field that covers a wide variety of sub-fields, including electricity and electronics. It is a field that goes back to the...

Capacitor Theory

Capacitors are widely used in electrical engineering for functions such as energy storage, power factor correction, voltage compensation and many others...

Multimeter

Multimeters are undoubtedly the most common item of electrical test equipment in use.  Often it is the first piece of equipment people will turn to when...

Differential protection, the good old days

This morning I was explaining how differential protection works to a junior engineer. To give him something to read I opened up the NPAG (Network Protection...

IEC 61439 - The Switchgear Standard

The new standard IEC 61439 replaces the old 60439. Compared to the old standard, the new 61439 is a more clearly defined and takes into account the assembly...

Arc Flash Calculations

Working in the vicinity of electrical equipment poses an hazard. In addition to electric shock hazard, fault currents passing through air causes Arc Flash...

UPS Sizing - Rules of Thumb

It wasn't so long ago I was telling someone that I don't use rules of thumb as most things are easily calculated anyhow.   As it turns out I last week...

E-Ink

Before the technical, some general information. E-ink display are found in a lot of e-readers, some mobile phones and similar devices and the intent is...

Introduction to Lighting

When looking at the design of a lighting scheme it is useful to have an understanding on the nature of light itself and some of the basic theory associated...

Closed Doors

"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong...

Have some knowledge to share

If you have some expert knowledge or experience, why not consider sharing this with our community.  

By writing an electrical note, you will be educating our users and at the same time promoting your expertise within the engineering community.

To get started and understand our policy, you can read our How to Write an Electrical Note. 

Footer
(click here to extend)
Copyright (c) 2026 myElectrical