IEC 61148:2011

Terminal markings for valve device stacks and assemblies and for power conversion equipment

IEC 61148:2011 is applicable to the terminal markings for the main circuits of valve device stacks and assemblies, and of integrated conversion equipment. The terminal markings refer to stacks, assemblies and equipment comprising semiconductor valve devices. The object of this standard is to specify a logical alphanumeric marking system for the identification of the external main terminals of the main power circuits in a stack, valve device assembly or integrated conversion equipment, which is applicable for the purpose of reference in circuit diagrams, catalogues, descriptions, and information exchange and storage. In the case of stacks and assemblies, alphanumeric terminal marking systems are indicated for those converter connections which are the most important and most commonly used ones. Terminal marking systems making use of graphic symbols or identifying colours are not considered in this standard. This second edition includes the following significant technical changes with respect to the previous edition:
- the whole document has been rewritten according to the current Directives;
- the identification codes were deleted according to the withdrawal of IEC 60971;
- examples of terminal marking were added, especially for self-commutated converters.

Marquage des bornes de blocs et d'ensembles d'éléments de valve et d'équipement de conversion de puissance

La CEI 61148:2011 s'applique aux marquages des bornes des circuits principaux des blocs et des ensembles d'éléments de valve, ainsi qu'aux équipements intégrés de conversion. Le marquage des bornes se rapporte aux blocs, aux ensembles et aux équipements comprenant des éléments de valve à semiconducteurs. En ce qui concerne les blocs et les ensembles, les systèmes de marquage alphanumériques des bornes sont indiqués pour les montages de convertisseurs les plus importantes et les plus usuelles. Les systèmes de marquage de bornes qui se servent de symboles graphiques ou de couleurs ne sont pas pris en considération dans la présente norme. Cette deuxième édition présente les modifications techniques majeures suivantes par rapport à l'édition antérieure:
- l'ensemble du document a été reformulé conformément aux Directives actuelles;
- les codes d'identification ont été éliminés consécutivement à la suppression de la CEI 60971;
- des exemples de marquages de bornes ont été ajoutés, en particulier pour les convertisseurs auto-commutés.

General Information

• Status: Published
• Publication Date: 19-Oct-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• Technical Committee: TC 22 - Power electronic systems and equipment
• Drafting Committee: MT 3 - TC 22/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 31-Oct-2011
• Completion Date: 20-Oct-2011

Relations

• Revises: IEC 61148:1992 - Terminal markings for valve device stacks and assemblies and for power convertor equipment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61148 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Terminal markings for valve device stacks and assemblies and for power
conversion equipment
Marquage des bornes de blocs et d'ensembles d'éléments de valve et
d'équipement de conversion de puissance
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IEC 61148 ®
Edition 2.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Terminal markings for valve device stacks and assemblies and for power
conversion equipment
Marquage des bornes de blocs et d'ensembles d'éléments de valve et
d'équipement de conversion de puissance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.200 ISBN 978-2-88912-705-4

– 2 – 61148 © IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Method of identifying terminals . 7
5 Terminal marking for valve device stacks and assemblies . 8
5.1 Single and double way connections . 8
5.1.1 General . 8
5.1.2 Single way connections . 9
5.1.3 Double way connections . 11
5.1.4 Combination of connections . 13
5.2 Bi-directional connections . 14
5.2.1 Inseparable connections of pair of anti-parallel arms . 14
5.2.2 Combinations of pairs of anti-parallel arms . 15
6 Marking of external main terminals of integrated conversion equipment . 18
6.1 A.C. terminals . 18
6.1.1 Single-phase a.c. system . 18
6.1.2 Three-phase a.c. system . 18
6.1.3 A.C. conversion equipment with a.c. terminals on supply and load
side, for three-phase systems . 18
6.2 D.C. terminals . 19
6.2.1 General . 19
6.2.2 A.C./D.C. conversion equipment . 19
6.2.3 Double conversion equipment with reversible polarity of d.c.
terminals . 19
6.2.4 D.C. conversion equipment with d.c. terminals on the supply and load
sides . 19
6.2.5 Terminal for connection to mid-wire conductor . 20
6.2.6 Conversion equipment with more than one converter section with
separate terminal sets on supply and load side. 20
6.2.7 Conversion equipment in which the external main terminals are
formed by the main terminals of the assembly(ies) incorporated in the
equipment . 20
6.3 Marking of gate terminals . 22
6.3.1 General . 22
6.3.2 For thyristors . 22
6.3.3 For power transistors . 24

Figure 1 – Typical markings in single arm connections . 9
Figure 2 – Star connection with two arms . 10
Figure 3 – Star connection with three arms . 10
Figure 4 – Three groups with two arms . 11
Figure 5 – Two groups with three arms . 11
Figure 6 – Assembly for d.c. chopper . 11
Figure 7 – Pair of arms . 12
Figure 8 – Bridge connection . 12

61148 © IEC:2011 – 3 –
Figure 9 – Double bridge connection . 13
Figure 10 – Anti-parallel bridge connection . 13
Figure 11 – Series connection of bridges . 14
Figure 12 – Fully controllable anti-parallel pairs . 14
Figure 13 – Half-controllable anti-parallel pairs . 14
Figure 14 – Example for six-phase supply . 15
Figure 15 – Three-phase star connection . 16
Figure 16 – Three-phase star connection with neutral . 16
Figure 17 – Double two-phase star connection with neutral . 16
Figure 18 – Polygon connection . 16
Figure 19 – Legs for voltage stiff converters . 17
Figure 20 – Bridge connection for voltage stiff converter (two-level) . 17
Figure 21 – Three-level connection for inverter . 18
Figure 22 – Single-phase a.c./d.c. converter . 20
Figure 23 – Double converter . 21
Figure 24 – Three-phase rectifier with two sections and d.c. side centre tap for
connection to a mid-wire conductor . 21
Figure 25 – Direct (or indirect) d.c. converter with two independent sections . 21
Figure 26 – Indirect (or direct) a.c. converter . 22
Figure 27 – Three-phase star connection with neutral . 23
Figure 28 – Bridge connection . 23
Figure 29 – Thyristor with gate unit . 23
Figure 30 – Three-phase star connection with power transistors . 24
Figure 31 – Pair of power transistors with anti-parallel diodes . 24
Figure 32 – Power transistor with gate driver . 24

– 4 – 61148 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TERMINAL MARKINGS FOR VALVE DEVICE
STACKS AND ASSEMBLIES AND FOR
POWER CONVERSION EQUIPMENT
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matt
...