CLC/TS 60034-24:2011

SLOVENSKI STANDARD
01-april-2011
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Rotating electrical machines - Part 24: Online detection and diagnosis of potential
failures at the active parts of rotating electrical machines and of bearing currents -
Application guide (IEC/TS 60034-24:2009)
Drehende elektrische Maschinen - Teil 24: Erkennung und Diagnose von möglichen
Schäden an den Aktivteilen drehender elektrischer Maschinen und von Lagerströmen -
Anwendungsleitfaden (IEC/TS 60034-24:2009)
Machines électriques tournantes - Partie 24: Détection et diagnostic en ligne de
défaillances potentielles des parties actives de machines électriques tournantes et de
courants de palier - Guide d'application (CEI/TS 60034-24:2009)
Ta slovenski standard je istoveten z: CLC/TS 60034-24:2011
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.

TECHNICAL SPECIFICATION
CLC/TS 60034-24
SPÉCIFICATION TECHNIQUE
February 2011
TECHNISCHE SPEZIFIKATION
ICS 29.160
English version
Rotating electrical machines -
Part 24: Online detection and diagnosis of potential failures at the active
parts of rotating electrical machines and of bearing currents -
Application guide
(IEC/TS 60034-24:2009)
Machines électriques tournantes -  Drehende elektrische Maschinen -
Partie 24: Détection et diagnostic en ligne Teil 24: Erkennung und Diagnose von
de défaillances potentielles des parties möglichen Schäden an den Aktivteilen
actives de machines électriques drehender elektrischer Maschinen und
tournantes et de courants de palier - von Lagerströmen -
Guide d'application Anwendungsleitfaden
(CEI/TS 60034-24:2009) (IEC/TS 60034-24:2009)

This Technical Specification was approved by CENELEC on 2011-01-25.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.
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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 60034-24:2011 E

Foreword
The text of the Technical Specification IEC/TS 60034-24:2009, prepared by IEC TC 2, Rotating
machinery, was submitted to the formal vote and was approved by CENELEC as CLC/TS 60034-24 on
2011-01-25.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2011-07-25
__________
Endorsement notice
The text of the Technical Specification IEC/TS 60034-24:2009 was approved by CENELEC as a
Technical Specification without any modification.

IEC/TS 60034-24 ®
Edition 1.0 2009-09
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Rotating electrical machines –
Part 24: Online detection and diagnosis of potential failures at the active parts of
rotating electrical machines and of bearing currents – Application guide

Machines électriques tournantes –
Partie 24: Détection et diagnostic en ligne de défaillances potentielles des
parties actives de machines électriques tournantes et de courants de palier –
Guide d'application
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 29.160 ISBN 978-2-88910-021-7
– 2 – TS 60034-24 © IEC:2009
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Basis of the diagnosis .7
5 Kinds of electrical signal analysis .10
5.1 General remarks.10
5.2 Stator current/voltage analysis .10
5.3 Induced voltages of auxiliary turns embedded into the stator slots or other
magnetic sensors sensing the air-gap flux .11
5.4 Induced voltages of search coils collecting axial fluxes.14
5.5 Shaft voltage analysis .14
6 Detection of bearing currents.14
Bibliography.16

Table 1 – Most important magnetic fields in the air-gap of a three-phase cage induction
motor with an integral slot stator winding under normal operating and fault conditions .8
Table 2 – Diagnosis of failures at a cage induction motor, equipped with two identical
auxiliary coil systems.13

TS 60034-24 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 24: Online detection and diagnosis of potential failures
at the active parts of rotating electrical machines
and of bearing currents –
Application guide
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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• The subject is still under technical development or where, for any other reason, there is
the future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 60034-24, which is a technical specification, has been prepared by IEC technical
committee 2: Rotating machinery.

– 4 – TS 60034-24 © IEC:2009
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
2/1537/DTS 2/1553A/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
NOTE A table of cross-references of all IEC TC 2 publications can be found in the IEC TC 2 dashboard on the
IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
TS 60034-24 © IEC:2009 – 5 –
INTRODUCTION
Progress in design and technology has resulted in an increasing reliability of rotating
electrical machines, but failures could not be eliminated completely. Since the demand for a
high availability is permanently increasing, it is essential to detect deficiencies at an early
stage and to recognize the origin and identify the severity of the fault in order to estimate the
risk of a continuation of operation.
It would be advantageous, if the signals which are obtained by the detection methods
presented in this guide, were suitable to distinguish the different failures from each other. By
this means, the signal analysis can be used as input data of a complete monitoring system.
The aim of this guide is to present possible tools which are available for the intended purpose
and to explain their advantages and disadvantages. The minimum requirements which shall
be met by the various sensors will be discussed, whereas the detailed design rules are
outside the scope of this technical specification.
This guide deals with the detection of failures at the active parts of multi-phase rotating
machines (all kinds of winding faults in stator and rotor, cage deficiencies, eccentricities) and
of bearing currents.
– 6 – TS 60034-24 © IEC:2009
ROTATING ELECTRICAL MACHINES –

Part 24: Online detection and diagnosis of potential failures
at the active parts of rotating electrical machines
and of bearing currents –
Application guide
1 Scope
This part of IEC 60034 is applicable to the on-line detection and diagnosis of failures at the
active parts of multi-phase rotating electrical machines (induction and synchronous machines)
and of bearing currents. The failure analysis includes:
– interturn faults;
– phase-to-phase short-circuits;
– double earth faults and single earth faults of motors with earth connection of the star-
point;
– static and dynamic eccentricities;
– cage imperfection or defects (e.g. broken bars or end-rings);
– bearing currents.
This can be achieved by tools like search coils or other magnetic sensors or partly by the
an
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