IEC 61467:2008

Insulators for overhead lines - Insulator strings and sets for lines with a nominal voltage greater than 1 000 V - AC power arc tests

IEC 61467:2008 applies to insulator strings and sets comprising string insulator units of ceramic material, glass or composite material for use on a.c. overhead lines and traction lines with a nominal voltage above 1 000 V and a frequency between 15 Hz and 100 Hz. This standard also applies to insulator strings or sets of similar design used in substations. This standard establishes a standard test procedure for power arc tests on insulator sets. It also establishes a standard test procedure for power arc tests on short strings. This standard does not apply to insulator sets mounted on non-metallic poles or towers. This edition cancels and replaces IEC/TR 61467, which was published as a technical report in 1997. It constitutes a technical revision and now has the status of an International Standard.

Isolateurs pour lignes aériennes - Chaînes d'isolateurs et chaînes d'isolateurs équipées pour lignes de tension nominale supérieure à 1 000 V - Essais d'arc de puissance en courant alternatif

La CEI 61467:2008 s'applique aux chaînes d'isolateurs et chaînes d'isolateurs équipées, comprenant des éléments de chaîne d'isolateurs en matière céramique, en verre ou en matière composite destinées aux lignes aériennes et aux lignes de traction fonctionnant en courant alternatif de tension nominale supérieure à 1 000 V et de fréquence comprise entre 15 Hz et 100 Hz. Cette norme s'applique également aux chaînes d'isolateurs ou aux chaînes d'isolateurs équipées de conception similaire utilisées dans les postes. Cette norme établit une procédure d'essai normalisée pour les essais d'arc de puissance sur les chaînes d'isolateurs équipées. Elle établit également une procédure d'essai normalisée pour les essais d'arc de puissance sur les chaînes courtes. Cette norme ne s'applique pas aux chaînes d'isolateurs équipées montées sur des poteaux ou des pylônes non métalliques. Cette édition annule et remplace la CEI/TR 61467 publiée sous la forme d'un rapport technique en 1997, dont elle constitue une révision technique. Le présent document a désormais le statut de Norme internationale.

General Information

• Status: Published
• Publication Date: 11-Aug-2008
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.080.10 - Insulators
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: TC 36 - Insulators
• Drafting Committee: MT 14 - TC 36/MT 14
• Current Stage: PPUB - Publication issued
• Start Date: 15-Sep-2008
• Completion Date: 12-Aug-2008

Relations

• Replaces: IEC TS 61467:1997 - Insulators for overhead lines with a nominal voltage above 1000 V - A.C. power arc tests on insulator sets
• Effective Date: 28-Jun-2024

Standards Content (Sample)

IEC 61467
Edition 1.0 2008-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulators for overhead lines – Insulator strings and sets for lines with a nominal
voltage greater than 1 000 V – AC power arc tests

Isolateurs pour lignes aériennes – Chaînes d’isolateurs et chaînes d’isolateurs
équipées pour lignes de tension nominale supérieure à 1 000 V – Essais d’arc de
puissance en courant alternatif

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IEC 61467
Edition 1.0 2008-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulators for overhead lines – Insulator strings and sets for lines with a
nominal voltage greater than 1 000 V – AC power arc tests

Isolateurs pour lignes aériennes – Chaînes d’isolateurs et chaînes d’isolateurs
équipées pour lignes de tension nominale supérieure à 1 000 V – Essais d’arc
de puissance en courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 29.080.10; 29.240.20 ISBN 2-8318-9953-2
– 2 – 61467 © IEC:2008
CONTENTS
FOREWORD.4
1 Scope and object.6
2 Normative references .6
3 Terms and definitions .6
4 Symbols and abbreviations.7
5 Characteristics of the test current .8
6 Supply and return circuit conditions .9
7 Tests on insulator sets .11
7.1 General remarks.11
7.2 Test arrangement .11
7.3 Test current.11
7.4 Supply and return circuit conditions.11
7.5 Arc initiation .12
7.6 Ambient conditions .14
7.7 Test series and characteristics of the power arcs .14
8 Tests on short strings .14
8.1 General remark .14
8.2 Test arrangement .15
8.3 Test current.15
8.4 Supply and return circuit conditions.15
8.5 Arc initiation .15
8.6 Ambient conditions .15
8.7 Test series and characteristics of the power arcs .16
9 Test report.18
10 Evaluation of results .18
10.1 General remark .18
10.2 Visual examination .18
10.3 Porcelain or glass insulators.18
10.4 Composite insulators.19
10.5 Acceptance criteria.19
Annex A (normative) Examples of test arrangements and practical methods of tower
simulation (return circuit) .20
Annex B (normative) Determination of the r.m.s. value of the current.25
Annex C (informative) No-load voltage of the power source .27
Annex D (informative) Power arcs on insulator sets and their true simulation by
appropriate positioning of fusible wires .28
Annex E (informative) Wind velocity during power arc tests .30
Annex F (informative) Variation of the fault current magnitude and reasons for the
choice of the prescribed test parameters .31
Annex G (informative) Recommendations for the test report .33
Annex H (informative) Sample of a power arc test report .37
Bibliography.40

Figure 1 – Illustration of supply and return currents .10
Figure 2 – Arc initiation.13

61467 © IEC:2008 – 3 –
Figure 3 – Mounting arrangement for short strings .17
Figure A.1 – Test arrangement of vertical insulator set .21
Figure A.2 – Test arrangement of vertical insulator set using simplified tower steel
structure .22
Figure A.3 – Test arrangement of Vee insulator set located in the centre of the tower
(for the simplified tower steel structure and return circuit, see Figures A.1 and A.2).23
Figure A.4 – Test arrangement of horizontal insulator (for the simplified tower steel
structure and return circuit, see Figures A.1 and A.2) .24
Figure D.1 – 5 kA power arc test of a 145 kV string consisting of 7 cap and pin units.29
Figure F.1 – Distribution of arc current (I) and its supply circuit components (I , I )
S1 S2
along a 100 km long, 145 kV line connecting busbars of 28 kA short-circuit current .32

Table 1 – Supply and return conditions .9
Table 2 – Test series for insulator sets .14
Table 3 – Test series for short insulator strings.16
Table 4 – Test assessment criteria .19

– 4 – 61467 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSULATORS FOR OVERHEAD LINES –
INSULATOR STRINGS AND SETS FOR LINES WITH
A NOMINAL VOLTAGE GREATER THAN 1 000 V –
AC POWER ARC TESTS
FOREWORD
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