prEN IEC 60034-1:2024

Rotating electrical machines - Part 1: Rating and performance

Drehende elektrische Maschinen - Teil 1: Bemessung und Betriebsverhalten

Machines électriques tournantes - Partie 1: Caractéristiques assignées et caractéristiques de fonctionnement

Električni rotacijski stroji - 1. del: Nazivni podatki in preskus lastnosti

General Information

• Status: Not Published
• Publication Date: 01-Mar-2026
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: CLC/TC 2 - Rotating machinery
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 01-Nov-2024
• Completion Date: 01-Nov-2024
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: oSIST prEN IEC 60034-1:2024 - Rotating electrical machines - Part 1: Rating and performance

Relations

• Revises: FprEN IEC 60034-1:2021 - Rotating electrical machines - Part 1: Rating and performance
• Effective Date: 12-Dec-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Električni rotacijski stroji - 1. del: Nazivni podatki in preskus lastnosti
Rotating electrical machines - Part 1: Rating and performance
Drehende elektrische Maschinen - Teil 1: Bemessung und Betriebsverhalten
Machines électriques tournantes - Partie 1: Caractéristiques assignées et
caractéristiques de fonctionnement
Ta slovenski standard je istoveten z: prEN IEC 60034-1:2024
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

2/2204/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-1 ED15
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-08-09 2024-11-01
SUPERSEDES DOCUMENTS:
2/2168/CD, 2/2182A/CC
IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 9,TC 18
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Rotating electrical machines - Part 1: Rating and performance

PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 60034-1 ED15 © IEC 2024 – 2 – 2/2204/CDV

1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 7
4 1 Scope . 10
5 2 Normative references . 10
6 3 Terms and definitions . 12
7 4 Duty . 17
8 4.1 Declaration of duty . 17
9 4.2 Duty types . 17
10 4.2.1 Duty type S1 – Continuous running duty . 17
11 4.2.2 Duty type S2 – Short-time duty . 18
12 4.2.3 Duty type S3 – Intermittent periodic duty . 19
13 4.2.4 Duty type S4 – Intermittent periodic duty with starting . 20
14 4.2.5 Duty type S5 – Intermittent periodic duty with electric braking. 21
15 4.2.6 Duty type S6 – Continuous operation periodic duty . 22
16 4.2.7 Duty type S7 – Continuous operation periodic duty with electric braking . 23
17 4.2.8 Duty type S8 – Continuous operation periodic duty with related
18 load/speed changes . 24
19 4.2.9 Duty type S9 – Duty with non-periodic load and speed variations . 25
20 4.2.10 Duty type S10 – Duty with discrete constant loads and speeds . 26
21 5 Rating. 28
22 5.1 Assignment of rating . 28
23 5.2 Classes of rating . 29
24 5.2.1 Rating for continuous running duty . 29
25 5.2.2 Rating for short-time duty . 29
26 5.2.3 Rating for periodic duty . 29
27 5.2.4 Rating for non-periodic duty . 29
28 5.2.5 Rating for duty with discrete constant loads and speeds . 29
29 5.2.6 Rating for equivalent loading . 29
30 5.3 Selection of a class of rating . 30
31 5.4 Allocation of outputs to class of rating . 30
32 5.5 Rated output . 30
33 5.5.1 DC generators . 30
34 5.5.2 AC generators . 30
35 5.5.3 Motors . 30
36 5.5.4 Synchronous compensators . 30
37 5.6 Rated voltage . 31
38 5.6.1 DC generators . 31
39 5.6.2 AC generators . 31
40 5.6.3 AC motors . 31
41 5.7 Preferred combinations of voltages and outputs . 31
42 5.8 Machines with more than one rating . 31
43 6 Site conditions . 31
44 6.1 General . 31
45 6.2 Altitude . 31
46 6.3 Maximum ambient air temperature . 32
47 6.4 Minimum ambient air temperature . 32
48 6.5 Water coolant temperature . 32

IEC CDV 60034-1 ED15 © IEC 2024 – 3 – 2/2204/CDV

49 6.6 Standstill, storage and transport . 32
50 6.7 Purity of hydrogen coolant . 32
51 7 Electrical operating conditions . 32
52 7.1 Electrical supply . 32
53 7.2 Form and symmetry of voltages and currents . 33
54 7.2.1 AC motors . 33
55 7.2.2 AC generators . 34
56 7.2.3 Synchronous machines . 34
57 7.2.4 DC motors supplied from static power converters . 35
58 7.3 Voltage during starting of AC motors . 36
59 7.4 Voltage and frequency variations during operation . 36
60 7.5 Three-phase AC machines operating on unearthed systems . 38
61 7.6 Voltage (peak and gradient) withstand levels . 39
62 8 Thermal performance and tests . 39
63 8.1 Thermal class . 39
64 8.2 Reference coolant . 39
65 8.3 Conditions for thermal tests . 40
66 8.3.1 Electrical supply . 40
67 8.3.2 Temperature of machine before test . 40
68 8.3.3 Temperature of coolant . 40
69 8.3.4 Measurement of coolant temperature during test . 41
70 8.4 Temperature rise of a part of a machine . 41
71 8.5 Methods of measurement of temperature . 41
72 8.5.1 General . 41
73 8.5.2 Resistance method . 41
74 8.5.3 Embedded temperature detector (ETD) method . 41
75 8.5.4 Thermometer method. 42
76 8.6 Determination of winding temperature . 42
77 8.6.1 Choice of method . 42
78 8.6.2 Determination by resistance method . 42
79 8.6.3 Determination by ETD method . 44
80 8.6.4 Determination by thermometer method . 44
81 8.7 Duration of thermal tests . 45
82 8.7.1 Rating for continuous running duty . 45
83 8.7.2 Rating for short-time duty . 45
84 8.7.3 Rating for periodic duty . 45
85 8.7.4 Ratings for non-periodic duty and for duty with discrete constant loads . 45
86 8.8 Determination of the thermal equivalent time constant for machines of
87 duty type S9 . 45
88 8.9 Measurement of bearing temperature . 45
89 8.10 Limits of temperature and of temperature rise . 46
90 8.10.1 General . 46
91 8.10.2 Indirect cooled windings . 46
92 8.10.3 Direct cooled windings . 50
93 8.10.4 Adjustments to take account of hydrogen purity on test . 51
94 8.10.5 Permanently short-circuited windings, magnetic cores and all structural
95 components (other than bearings) whether or not in contact with
96 insulation . 51
97 8.10.6 Commutators and sliprings, open or enclosed and their brushes and
98 brushgear . 51
99 9 Other performance and tests . 53

IEC CDV 60034-1 ED15 © IEC 2024 – 4 – 2/2204/CDV

100 9.1 Routine tests. 53
101 9.2 Withstand voltage test .
...