Instrument transformers -- Part 1: Current transformers

Superseded by EN 61869-2:2012

Messwandler -- Teil 1: Stromwandler

Transformateurs de mesure -- Partie 1: Transformateurs de courant

Instrument transformers - Part 1: Current transformers

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Current Stage
9900 - Withdrawal (Adopted Project)
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SLOVENSKI SIST EN 60044-1:2001/A2:2003
september 2003
Instrument transformers - Part 1: Current transformers
ICS 17.220.20 Referenčna številka
SIST EN 60044-1:2001/A2:2003(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

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ICS 17.220.20; 29.180
English version
Instrument transformers
Part 1: Current transformers
(IEC 60044-1:1996/A2:2002)
Transformateurs de mesure Messwandler
Partie 1: Transformateurs de courant Teil 1: Stromwandler
(CEI 60044-1:1996/A2:2002) (IEC 60044-1:1996/A2:2002)

This amendment A2 modifies the European Standard EN 60044-1:1999; it was approved by CENELEC

on 2002-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this amendment the status of a national standard without any


Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the Central Secretariat or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language

made by translation under the responsibility of a CENELEC member into its own language and notified to the

Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,

Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,

Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60044-1:1999/A2:2003 E
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EN 60044-1:1999/A2:2003 - 2 -

The text of document 38/285/FDIS, future amendment 2 to IEC 60044-1:1996, prepared by

IEC TC 38, Instrument transformers, was submitted to the IEC-CENELEC parallel vote and was

approved by CENELEC as amendment A2 to EN 60044-1:1999 on 2002-12-01.
The following dates were fixed:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2003-09-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2005-12-01
Endorsement notice

The text of amendment 2:2002 to the International Standard IEC 60044-1:1996 was approved by

CENELEC as an amendment to the European Standard without any modification.
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Amendement 2
Transformateurs de mesure –
Partie 1:
Transformateurs de courant
Amendment 2
Instrument transformers –
Part 1:
Current transformers
 IEC 2002 Droits de reproduction réservés  Copyright - all rights reserved

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: Web:

Commission Electrotechnique Internationale
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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60044-1 Amend. 2  IEC:2002 – 3 –

This amendment has been prepared by IEC technical committee 38: Instrument transformers.

The text of this amendment is based on the following documents:
FDIS Report on voting
38/285/FDIS 38/289/RVD

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of the base publication and its amendments will

remain unchanged until 2005-12. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
Page 11
2.1 General definitions
Insert, after definition 2.1.16, the following new definition:
highest voltage of a system

highest value of operating voltage which occurs under normal operating conditions at any time

and at any point in the system
Renumber the existing definitions 2.1.17 to 2.1.33 as 2.1.18 to 2.1.34.
Page 15
rated continuous thermal current

Renumber definition 2.1.29 and add, at the end of the title, the symbol, as follows:

rated continuous thermal current (I )
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60044-1 Amend. 2  IEC:2002 – 5 –
Add, after definition 2.1.34, the following new definition:
multi-ratio current transformer

current transformer on which more ratios are obtained by connecting the primary winding

sections in series or parallel or by means of taps on the secondary winding
2.2 Additional definitions for measuring current transformers
instrument security factor (FS)
Add, below the definition, the following new note:

NOTE 1 Attention should be paid to the fact that the actual instrument security factor is affected by the burden.

Renumber the existing note as NOTE 2.
Page 23
4.3 Rated continuous thermal current

Replace the text of the existing subclause by the following (the amendment of the title

concerns the French version only):

The standard value of rated continuous thermal current is the rated primary current.

When a rated continuous thermal current greater than rated primary current is specified, the

preferred values should be 120 % to 150 % and 200 % of rated primary current.
Page 25
5.1 Insulation requirements
Add after 5.1.7 the following new subclause:
5.1.8 Transmitted overvoltages
These requirements apply to
– current transformers having primary winding with U ≥ 72,5 kV;
– current transformers without primary winding and associated to equipment with
U ≥ 72,5 kV (i.e., GIS, transformer turrets, cable slip-over).

The overvoltages transmitted from the primary to the secondary terminals shall not exceed the

values given in Table 16, under the test and measuring conditions described in 9.4.

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60044-1 Amend. 2  IEC:2002 – 7 –

NOTE 1 The wave-shape characteristics are representative of voltage oscillations due to switching operations.

NOTE 2 Other transmitted overvoltage limits may be agreed between manufacturer and purchaser.

Type A impulse requirement applies to current transformers for air-insulated substations,

while impulse B requ

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