EN IEC 60773:2021

SLOVENSKI STANDARD
01-oktober-2021
Električni rotacijski stroji - Preskusne metode in aparati za merjenje obratovalnih
lastnosti ščetk (IEC 60773:2021)
Rotating electrical machines - Test methods and apparatus for the measurement of the
operational characteristics of brushes (IEC 60773:2021)
Drehende elektrische Maschinen - Prüfverfahren und -einrichtungen für die Messung der
Betriebseigenschaften von Kohlebürsten (IEC 60773:2021)
Machines électriques tournantes - Méthodes d'essai et appareils pour le mesurage des
caractéristiques opérationnelles des balais (IEC 60773:2021)
Ta slovenski standard je istoveten z: EN IEC 60773:2021
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.

EUROPEAN STANDARD EN IEC 60773

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 29.160.10
English Version
Rotating electrical machines - Test methods and apparatus for
the measurement of the operational characteristics of brushes
(IEC 60773:2021)
Machines électriques tournantes - Méthodes d'essai et Drehende elektrische Maschinen - Prüfverfahren und -
appareils pour le mesurage des caractéristiques einrichtungen für die Messung der Betriebseigenschaften
opérationnelles des balais von Kohlebürsten
(IEC 60773:2021) (IEC 60773:2021)
This European Standard was approved by CENELEC on 2021-05-12. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60773:2021 E
European foreword
The text of document 2/2045/FDIS, future edition 2 of IEC 60773, prepared by IEC/TC 2 "Rotating
machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-02-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-05-12
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60773:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60027-4:2006 NOTE Harmonized as EN 60027-4:2007 (not modified)
IEC 60034-1:2017 NOTE Harmonized as EN 60034-1:— (modified)
ISO 4287:1997 NOTE Harmonized as EN ISO 4287:1998 (not modified)
ISO 4287:1997/A1:2009 NOTE Harmonized as EN ISO 4287:1998/A1:2009 (not modified)

To be published. Stage at the time of publication: FprEN 60034-1:2017/prAA.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-19 2014 Rotating electrical machines - Part 19: EN 60034-19 2014
Specific test methods for d.c. machines on
conventional and rectifier-fed supplies
IEC 60136 - Dimensions of brushes and brush-holders - -
for electrical machinery
IEC 60276 2018 Carbon brushes, brush holders, EN IEC 60276 2019
commutators and slip-rings - Definitions and
nomenclature
IEC 60356 - Dimensions for commutators and slip-rings - -
IEC 60584-1 2013 Thermocouples - Part 1: EMF specifications EN 60584-1 2013
and tolerances
IEC 60751 2008 Industrial platinum resistance thermometers EN 60751 2008
and platinum temperature sensors
IEC/TR 61015 - Brush-holders for electrical machines. - -
Guide to the measurement of the static
thrust applied to brushes
ISO 1190-1 1982 Copper and copper alloys; Code of - -
designation; Part 1: Designation of
materials
ISO 3274 1996 Geometrical Product Specifications (GPS) - EN ISO 3274 1997
Surface texture: Profile method - Nominal
characteristics of contact (stylus)
instruments
ISO 15510 2014 Stainless steels - Chemical composition - -

IEC 60773 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines – Test methods and apparatus for the

measurement of the operational characteristics of brushes

Machines électriques tournantes – Méthodes d'essai et appareils pour le

mesurage des caractéristiques opérationnelles des balais

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.160.10 ISBN 978-2-8322-9656-1

– 2 – IEC 60773:2021 © IEC 2021
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, symbols and abbreviated terms . 8
3.1 Terms and definitions . 9
3.2 Symbols . 15
3.2.1 Symbols and units . 15
3.2.2 Subscripts . 16
3.3 Abbreviated terms . 17
4 Test rig specification. 18
4.1 Common specification . 18
4.1.1 General . 18
4.1.2 Rings . 18
4.1.3 Brushes . 19
4.1.4 Brush holders . 19
4.1.5 Power supply . 21
4.1.6 Instrumentation . 21
4.2 Test rig specification for commutators . 31
4.2.1 General . 31
4.2.2 Test rings . 31
4.2.3 Brushes arrangement . 34
4.2.4 Special brush for voltage drop measurement . 35
4.3 Test rig specification for slip rings . 36
4.3.1 General . 36
4.3.2 Ring. 36
4.3.3 Brushes . 38
4.3.4 Configuration for DC and AC operation . 38
5 Test schedule and operating conditions . 40
5.1 General . 40
5.2 Environmental conditions . 41
5.2.1 Laboratory environment . 41
5.2.2 Ambient air temperature and ring surface temperature . 41
5.2.3 Ambient humidity . 41
5.3 Operating conditions . 41
5.4 Test preparation and inspection . 42
5.4.1 General . 42
5.4.2 Test rig . 42
5.4.3 Brush-holders . 42
5.4.4 Test brushes . 42
5.4.5 Ring roughness . 42
5.4.6 Brush bedding . 43
5.4.7 Brushes measurement . 43
5.5 Test sequence . 43
5.5.1 Test starting . 43
5.5.2 Test duration . 43
5.6 Measurements and observations . 43
5.6.1 General . 43

IEC 60773:2021 © IEC 2021 – 3 –
5.6.2 Interval between measurements . 44
5.6.3 Before starting a test sequence . 44
5.6.4 Measurements during a test sequence . 45
5.6.5 Measurements after a test sequence . 45
6 Determination of friction coefficient . 45
6.1 General . 45
6.2 Test conditions . 46
6.3 Measurements . 46
6.3.1 General . 46
6.3.2 Test rig arrangement of Method a) . 46
6.3.3 Test rig arrangement of Method b) . 46
6.4 Calculation of friction coefficient .
...