IEC 60034-7:2020

Rotating electrical machines - Part 7: Classification of types of construction, mounting arrangements and terminal box position (IM Code)

IEC 60034-7:2020 specifies the IM Code, a classification of types of construction, mounting arrangements and the terminal box position of rotating electrical machines. Two systems of classification are provided as follows:
- Code I: An alpha-numeric designation applicable to machines with end-shield bearing(s) and only one shaft extension
- Code II: An all-numeric designation applicable to a wider range of types of machines including types covered by Code I.
This third edition cancels and replaces the second edition, published in 1992, and its Amendment 1:2000. The main technical changes with regard to the previous edition are as follows:
- note on twin motors added
- reference to 4.3 instead of duplication of text
- new subclause on marking of shaft inclination or declination.
The contents of the corrigendum of March 2023 have been included in this copy.

Machines électriques tournantes - Partie 7: Classification des modes de construction, des dispositions de montage et position de la boîte à bornes (Code IM)

l’IEC 60034-7:2020 spécifie le Code IM, une classification des modes de construction, des dispositions de montage et position de la boîte à bornes des machines électriques tournantes. Deux systèmes de classification sont prévus comme suit:
- Code I: Désignation alphanumérique applicable aux machines à flasque(s) palier(s) et à un seul bout d'arbre
- Code II: Désignation numérique applicable à une plus large plage de types de machines, y compris les types couverts par le Code I
Cette troisième édition annule et remplace la deuxième édition, parue en 1992, ainsi que son Amendement 1:2000. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de la note relative aux moteurs doubles
- référence à 4.3 remplaçant la répétition du texte
- nouveau paragraphe relatif au marquage de l’inclinaison ou de la déclinaison de l’arbre
Le contenu du corrigendum de mars 2023 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 06-Oct-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: TC 2 - Rotating machinery
• Drafting Committee: WG 12 - TC 2/WG 12
• Current Stage: PPUB - Publication issued
• Start Date: 09-Oct-2020
• Completion Date: 07-Oct-2020

Relations

• Corrected By: IEC 60034-7:2020/COR1:2023 - Corrigendum 1 - Rotating electrical machines - Part 7: Classification of types of construction, mounting arrangements and terminal box position (IM Code)
• Effective Date: 05-Sep-2023
• Revises: IEC 60034-7:1992/AMD1:2000 - Amendment 1 - Rotating electrical machines - Part 7: Classification of types of constructions and mounting arrangements (IM Code)
• Effective Date: 05-Sep-2023
• Revises: IEC 60034-7:1992 - Rotating electrical machines - Part 7: Classification of types of constructions and mounting arrangements (IM Code)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60034-7 ®
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 7: Classification of types of construction, mounting arrangements
and terminal box position (IM Code)

Machines électriques tournantes –
Partie 7: Classification des modes de construction, des dispositions
de montage et position de la boîte à bornes (Code IM)

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IEC 60034-7 ®
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –

Part 7: Classification of types of construction, mounting arrangements

and terminal box position (IM Code)

Machines électriques tournantes –

Partie 7: Classification des modes de construction, des dispositions

de montage et position de la boîte à bornes (Code IM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-8845-0

– 2 – IEC 60034-7:2020 © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Code I (alpha-numeric designation) . 7
4.1 Designation of machines with horizontal shafts . 7
4.2 Designation of machines with vertical shafts . 9
4.3 Terminal box location . 12
5 Code II (all-numeric designation) . 12
5.1 Designation . 12
5.2 Significance of the first numeral . 13
5.3 Significance of the fourth numeral . 13
5.4 Significance of the second and third numerals . 13
5.5 Terminal box location . 14
5.6 Examples of designations . 14
5.7 Inclination or declination of shaft . 14
Annex A (informative) Relationship between Code I and Code II . 24
Bibliography . 25

Table 1 – Designations for machines with horizontal shafts (IM B.) . 8
Table 2 – Designations for machines with vertical shafts (IM V.) . 10
Table 3 – Code letter for terminal box location . 12
Table 4 – Significance of the first numeral . 13
Table 5 – Significance of the fourth numeral . 13
Table 6 – Significance of second and third numerals for first numeral 1 (Foot-mounted
machines with endshield bearing(s) only) . 15
Table 7 – Significance of second and third numerals for first numeral 2 (Foot-and-
flange-mounted machines with endshield bearing(s) only). 16
Table 8 – Significance of second and third numerals for first numeral 3 (Flange-
mounted machines with endshield bearing(s) only with a flange part of an endshield) . 17
Table 9 – Significance of second and third numerals for first numeral 4 (Flange-
mounted machines with endshield bearing(s) only with a flange not part of an
endshield, but an integral part of the frame or other component) . 18
Table 10 – Significance of second and third numerals for first numeral 5 (Machines
without bearings) . 19
Table 11 – Significance of second and third numerals for first numeral 6 (Machines
with endshield bearings and pedestal bearings) . 20
Table 12 – Significance of second and third numerals for first numeral 7 (Machines
with pedestal bearings only) . 21
Table 13 – Significance of second and third numerals for first numeral 8 (Vertical
machines of construction not covered by first numerals 1 to 4) . 22
Table 14 – Significance of second and third numerals for first numeral 9 (Machines
with special mounting arrangements) . 23
Table A.1 – Relationship between Code I and Code II for machines with horizontal
shafts (IM B.) . 24

Table A.2 – Relationship between Code I and Code II for machines with vertical shafts
(IM V.) . 24

– 4 – IEC 60034-7:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 7: Classification of types of construction,
mounting arrangements and terminal box position (IM Code)

FOREWORD
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