Amendment 1 - IEC standard voltages

Amendement 1 - Tensions normales de la CEI

General Information

Status
Published
Publication Date
21-Sep-1994
Drafting Committee
WG 5 - TC 8/WG 5
Current Stage
DELPUB - Deleted Publication
Start Date
17-Jun-2009
Completion Date
26-Oct-2025

Relations

Effective Date
05-Sep-2023
Effective Date
05-Sep-2023

Overview

IEC 60038:1983/AMD1:1994 Amendment 1 is a key update by the International Electrotechnical Commission (IEC) concerning standard voltages in electrical systems. Prepared by IEC Technical Committee 8, this amendment refines definitions and updates tables related to nominal voltages for alternating current (AC) systems, particularly within the voltage range of 100 V to 1000 V. It also provides recommendations for the transition of existing network voltages to standardized values for enhanced compatibility and safety.

This amendment aims to harmonize voltage standards globally to facilitate uniformity in electrical system design, equipment manufacturing, and regulatory compliance. It provides detailed terminology clarifications and updated technical data tables essential for manufacturers, utility providers, and engineers working in electrical power systems.

Key Topics

  • Nominal System Voltage
    Defined as the voltage by which an electrical system is designated. This ensures a consistent reference point for the design and operation of power systems.

  • Supply and Utilization Voltages

    • Supply Voltage: Voltage measured between phases or between phase and neutral at supply terminals, typically of the electricity provider.
    • Utilization Voltage: The voltage at electrical outlets or equipment terminals where devices are connected and used.
  • Voltage Ranges
    Includes recommended tolerances for both supply voltage at the point of delivery and utilization voltage at the equipment terminals. Under normal operating conditions, supply voltage variations are recommended not to exceed ±10% of the nominal voltage.

  • Equipment Rated and Highest Voltages
    Equipment ratings specify operating voltages assigned by manufacturers, with attention to insulation and other voltage-dependent characteristics. The standard clarifies the highest permissible voltages for equipment, especially for networks exceeding 1000 V nominal voltage.

  • Voltage Standardization Tables
    Amendment 1 updates the standard voltage tables for three-phase and single-phase AC systems, including:

    • Common nominal voltages such as 230/400 V, 400/690 V, and transitional recommendations from legacy values like 220/380 V and 240/415 V to the standardized voltages.
    • Voltage specifications for industrial and large commercial applications, ensuring compatibility across varied environments.

Applications

  • Electrical Distribution Networks
    Utilities use these standards to define and regulate distribution voltages, ensuring compatibility with consumer installations and equipment.

  • Electrical Equipment Manufacturing
    Manufacturers specify rated voltages of components and devices according to IEC nominal voltages, enabling global interoperability and safety compliance.

  • Installation and Maintenance
    Electricians and engineers employ the defined voltage ranges and terminology to design, install, and maintain electrical systems that meet international requirements and endure voltage fluctuations.

  • Regulatory Frameworks
    National and international bodies adopt IEC 60038 amendment guidelines to legislate voltage standards, thereby improving system reliability and reducing electrical hazards.

Related Standards

  • IEC 335-1 and IEC 71
    Referenced within the amendment for further definitions related to voltage ranges and equipment characteristics.

  • IEC 60038 Main Standard
    The base standard for standard voltages, with Amendment 1 providing detailed refinements and transitional guidance.

  • Technical Committees on Electrical Installations and Equipment
    Committees that develop product-specific standards integrating voltage considerations from IEC 60038 to ensure conformity in diverse electrical devices and systems.


Implementing IEC 60038:1983/AMD1:1994 Amendment 1 facilitates the global move toward consistent, reliable electrical voltage standards. Its detailed definitions, voltage tables, and transition provisions provide practical guidance crucial for electricity suppliers, manufacturers, and regulatory agencies to enhance system compatibility and safety across international markets.

Standard

IEC 60038:1983/AMD1:1994 - Amendment 1 - IEC standard voltages Released:9/22/1994 Isbn:2831831288

English and French language
9 pages
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Frequently Asked Questions

IEC 60038:1983/AMD1:1994 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Amendment 1 - IEC standard voltages". This standard covers: Amendment 1 - IEC standard voltages

Amendment 1 - IEC standard voltages

IEC 60038:1983/AMD1:1994 is classified under the following ICS (International Classification for Standards) categories: 29.020 - Electrical engineering in general. The ICS classification helps identify the subject area and facilitates finding related standards.

IEC 60038:1983/AMD1:1994 has the following relationships with other standards: It is inter standard links to IEC 60038:1983, IEC 60038:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase IEC 60038:1983/AMD1:1994 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of IEC standards.

Standards Content (Sample)


NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
STANDARD
AMENDEMENT 1
AMENDMENT 1
1994-08
Amendement 1
Tensions normales de la CEI
Amendment 1
IEC standard voltages
© CEI 1995   Droits de reproduction réservés — Copyright - all rights reserved
Bureau Central de la Commission Electrotechnique Internationale  3, rue de Varembé  Genève, Suisse
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission PRICE CODE E
Pour prix, voir catalogue en vigueur
For price, see current catalogue

- 2 - 38 amend. 1 © CEI:1994
AVANT-PROPOS
Le présent amendement a été établi par le comité d’études 8 de la CEI: Tensions et courants nor-

maux – fréquences normales.
Le texte de cet amendement est issu des documents suivants:

DIS Rapport de vote
8(BC)1137+1137A 8(BC)1138
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l’approbation de cet amendement.
__________
Page 6
SECTION UN – DÉFINITIONS
1  Tension nominale
Remplacer le titre et le texte de cet article par ce qui suit:
1  Tension nominale de réseau
Tension par laquelle un réseau est dénommé.
2  Valeurs extrêmes de la tension d’un réseau (à l’exclusion de toutes conditions
transitoires ou anormales)
Remplacer le titre de cet article par le suivant:
2  Tensions la plus élevée et la plus basse d’un réseau (à l’exclusion de toutes
conditions transitoires ou anormales)
Page 8
Remplacer les articles 3 et 4 existants par les nouveaux articles suivants:
3  Point de livraison
Le point où le réseau de distribution du distributeur d’électricité et les réseaux du client sont
connectés.
38 Amend. 1 © IEC:1994 - 3 -
FOREWORD
This amendment has been prepared by IEC technical committee 8: Standard voltages, current

ratings and frequencies.
The text of this amendment is based on the following documents:

DIS Report on voting
8(CO)1137+1137A 8(CO)1138
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
__________
Page 7
SECTION ONE – DEFINITIONS
1  Nominal voltage
Replace the title and text of this clause by the following:
1  Nominal system voltage
Voltage by which a system is designated.
2  Highest and lowest voltages of a system (excluding transient or abnormal
conditions)
This correction applies to the French text only.

Page 9
Replace the existing clauses 3 and 4 by the following new clauses:
3  Supply terminals
The point where the distribution system of the electricity supply authority and the electrical system
of the consumer are connected.

- 4 - 38 amend. 1 © CEI:1994
4  Tension d’alimentation
Tension entre phases ou entre phase et neutre au point de livraison.

5  Plage de tension d’alimentation

Plage de tension au point de livraison.

6  Tension d’utilisation
Tensions entre phases ou entre phase et neutre au socle de la prise de courant ou aux bornes
d’un matériel.
7  Plage de la tension d’utilisation
Plage de la tension au socle de la prise de courant ou aux bornes d’un matériel.
8  Tension assignée (d’un matériel)
Tension généralement attribuée par un constructeur, pour une condition de fonctionnement spéci-
fiée relative à un composant, un dispositif ou un matériel.
9  Tension la plus élevée d’un matériel
Tension la plus élevée pour laquelle le matériel est spécifié en ce qui concerne:
a) l’isolation;
b) certaines autres caractéristiques qui sont éventuellement rattachées à cette tension la plus
élevée dans les recommandations correspondantes des matériels.
La tension la plus élevée pour le matériel est la valeur maximale de la «tension la plus élevée
du réseau» (voir 2.1) pour laquelle le matériel peut être utilisé.
NOTES
1 La tension la plus élevée pour le matériel est indiquée seulement pour les tensions nominales des réseaux
supérieures à 1 000 V. Il est entendu que, particulièrement pour certaines tensions nominales des réseaux, le fonction-
nement normal des matériels peut n’être pas assuré jusqu’à cette tension la plus élevée pour le matériel eu égard à
des caractéristiques dépendant de la tension, telles que, par exemple, les pertes dans les condensateurs, le courant

magnétisant des transformateurs, etc.
Dans ces cas, les recommandations correspondantes doivent spécifier la limite jusqu’à laquelle le fonctionnement nor-
mal de ces matériels peut être assuré.
2 Il est entendu que les matériels destinés aux réseaux à tension nominale n’excédant pas 1 000 V seront spécifiés
avec référence à la tension nominale du réseau seulement, en ce qui concerne tant le fonctionnement que l’isolation.
3L’attention est attirée sur le fait que dans certaines normes de produit (par exemple, la CEI 335-1 et la CEI 71) le
terme «plage de tension» a une signification différente.

38 Amend. 1 © IEC:1994 - 5 -
4  Supply voltage
The phase-to-phase or phase-to-neutral voltage at the supply terminals.

5 Supply voltage range
The voltage range at the supply terminals.

6  Utilization voltage
The phase-to-phase or phase-to-neutral voltage at the outlets or at the terminals of equipment.
7  Utilization voltage range
The voltage range at the outlets or at the terminals of equipment.
8  Rated voltage (of equipment)
The voltage assigned generally by a manufacturer, for a specified operating condition of a compo-
nent, device or equipment.
9  Highest voltage for equipment
Highest voltage for which the equipment is specified regarding:
a) the insulation;
b) other characteristics which may be referred to this highest voltage in the relevant equipment
recommendations.
The highest voltage for equipment is the maximum value of the "highest system voltage"
(see 2.1) for which the equipment may be used.
NOTES
1 The highest voltage for equipment is indicated for nominal system voltages higher than 1 000 V only. It is under-
stood that, particularly for certain nominal system voltages, normal operation of equipment cannot be ensured up to this
highest voltage for equipment, having regard to voltage-sensitive characteristics such as losses of capacitor
...

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