ISO 13373-10:2024
(Main)Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 10: Diagnostic techniques for electrical generators with fluid-film bearings
Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 10: Diagnostic techniques for electrical generators with fluid-film bearings
This document gives guidelines and requirements for the procedures to be followed when carrying out vibration diagnostics of 2‑ and 4‑pole electrical generators of cylindrical pole design with fluid-film bearings. This document does not apply to salient pole generators. This document establishes a practical step-by-step vibration-based approach to fault diagnosis. The requirements of this document should be considered together with those in ISO 13373-4.
Surveillance et diagnostic d'état des machines — Surveillance des vibrations — Partie 10: Techniques de diagnostic pour les générateurs électriques de puissance à paliers à film fluide
General Information
Buy Standard
Standards Content (Sample)
International
Standard
ISO 13373-10
First edition
Condition monitoring and
2024-06
diagnostics of machines —
Vibration condition monitoring —
Part 10:
Diagnostic techniques for electrical
generators with fluid-film bearings
Surveillance et diagnostic d'état des machines — Surveillance des
vibrations —
Partie 10: Techniques de diagnostic pour les générateurs
électriques de puissance à paliers à film fluide
Reference number
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Measurements . 2
4.1 Vibration measurements .2
4.2 Machine operational parameter measurement .2
5 Initial analysis . 2
6 Specific analysis of electrical generators with fluid-film bearings . 2
7 Considerations when recommending actions . 3
Annex A (normative) Systematic approach to the vibration analysis of electrical generators
with fluid-film bearings — Fault tables . 4
Annex B (informative) Methodology for diagnosing vibration problems in electrical generators
with fluid-film bearings . 8
Annex C (informative) Examples of faults occurring in electrical generators with fluid-film
bearings .12
Bibliography .20
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to
machines, vehicles and structures.
A list of all parts in the ISO 13373 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
This document provides guidelines for the procedures to be considered when carrying out vibration
diagnostics of electrical generators with fluid-film bearings. It is intended to be used by vibration
practitioners, engineers and technicians and it provides them with useful diagnostic tools which include the
use of flowcharts and fault tables.
ISO 20816-2 sets out the criteria for monitoring the vibration of gas turbines, steam turbines and generators
in excess of 40 MW and establishes provisions for evaluating the severity of the in-situ, broad-band vibration.
ISO 13373-1 presents the basic procedures for analysing narrow-band vibration signals. It includes the
types of transducers to be used, their ranges, their recommended mounting locations on various types of
machines, on-line and periodic vibration monitoring systems and potential machinery problems.
ISO 13373-2 includes descriptions of the signal conditioning equipment that is required, the time and
frequency domain techniques that can be used and the waveforms and signatures that represent the most
common machinery operating phenomena or faults encountered when performing vibration signature
analysis.
ISO 13373-3 describes some procedures to determine the causes of vibration problems common to all types
of rotating machines. It includes descriptions of systematic approaches that can be used to characterize
vibration effects, the diagnostic tools available, which tools are needed for particular applications and
recommendations on how the tools can be used for different machine types and components. ISO 13373-3
does not preclude the use of other diagnostic techniques.
Note that ISO 17359 indicates that diagnostics can be
a) started after detection of an anomaly during machine monitoring, or
b) carried out in parallel with machine monitoring.
This document considers only where diagnostics are performed after an anomaly has been detected and
focusses mainly on the use of flowcharts, process tables, fault and symptom tables as diagnostic tools, since
it is felt that these are the tools that are most appropriate for use in the field.
The flowchart and diagnostic process table methodology presents a structured procedure for use by a
person in the field to diagnose a fault and find its cause. This step-by-step procedure guides the practitioner
to be able to diagnose the machine anomaly in order to establish the probable root cause of this anomaly.
The fault tables present a list of the most common faults found in machinery, as well as their manifestations
in the machine and vibration data. The symptom tables contain the main distinguishing vibration features of
the main faults. When used with the flowcharts, the tables assist with the identification of machinery faults.
When approaching a machinery problem that manifests itself as a high or erratic vibration signal, the
diagnosis of the problem should be done in a systematic manner. This document and ISO 13373-3 achieve
that by providing guidance regarding the selection of the measuring and analysis tools, their use and the
step-by-step procedures that can be used to diagnose the problem.
v
International Standard ISO 13373-10:2024(en)
Condition monitoring and diagnostics of machines —
Vibration condition monitoring —
Part 10:
Diagnostic techniques for electrical generators with fluid-film
bearings
1 Scope
This document gives guidelines and requirements for the procedures to be followed when carrying out
vibration diagnostics of 2- and 4-pole electrical generators of cylindrical pole design with fluid-film bearings.
This document does not apply to salient pole generators.
This document establishes a practical step-by-step vibration-based approach to fault diagnosis.
The requirements of this document should be considered together with those in ISO 13373-4.
2 Normative references
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.
ISO 2041, Mechanical vibration, shock and condition monitoring — Vocabulary
ISO 13372, Condition monitoring and diagnostics of machines — Vocabulary
ISO 13373-1, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 1:
General procedures
ISO 13373-2, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 2:
Processing, analysis and presentation of vibration data
ISO 13373-3:2015, Condition monitoring and diagnostics of machines — Vibration condition monitoring —
Part 3: Guidelines for vibration diagnosis
ISO 21940-2, Mechanical vibration — Rotor balancing — Part 2: Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 13372 and ISO 21940-2 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Measurements
4.1 Vibration measurements
Vibration measurements may be obtained using two main categories of transducers:
a) non-contacting (e.g. inductive, capacitive and eddy current probes used on rotating shafts);
b) seismic (e.g. accelerometers or velocity transducers used on non-rotating parts, such as the bearing
housing).
International Standards have been written to help in assessing the vibration severity for both types of
measurements (e.g. ISO 20816 (all parts) and ISO 10816 (all parts)).
It is important to recognize that the appropriate transducer, signal conditioning, measurement and analysis
system shall be used for the diagnosis of faults related to electrical generators with fluid-film bearings.
Before any measurements are taken, it is good practice to consider whether the grounding (earthing) and
electrical fields of the machine will have any effect on them.
Descriptions of the transducers, measurement systems and analysis techniques are given in ISO 13373-1
and ISO 13373-2, which shall be used as appropriate.
Other diagnostic technologies are available for taking measurements on generators that can be considered
in specific cases (e.g. model based voltage and current systems, strain gauges and optical sensors).
Many electrical generators are equipped with stator end-winding and core vibration monitoring systems. For
guidelines regarding generators with end-winding vibration measurement systems see IEC/TS 60034-32.
Evaluation of the measurement results is very design specific and outside of the scope of this document.
It is recommended to adhere to the manufacturer’s and service provider’s guidelines regarding end-winding
and core vibration evaluation for specific machine designs and/or similarly designed units.
4.2 Machine operational parameter measurement
Data from operational parameters (e.g. rotationa
...
FINAL DRAFT
International
Standard
ISO/FDIS 13373-10
ISO/TC 108/SC 2
Condition monitoring and
Secretariat: DIN
diagnostics of machines —
Voting begins on:
Vibration condition monitoring —
2024-04-08
Part 10:
Voting terminates on:
2024-06-03
Diagnostic techniques for electrical
generators with fluid film bearings
Surveillance et diagnostic d'état des machines - Surveillance des
vibrations —
Partie 10: Techniques de diagnostic pour les générateurs
électriques de puissance de sortie supérieure à 50 MVA
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 13373-10:2024(en) © ISO 2024
FINAL DRAFT
ISO/FDIS 13373-10:2024(en)
International
Standard
ISO/FDIS 13373-10
ISO/TC 108/SC 2
Condition monitoring and
Secretariat: DIN
diagnostics of machines —
Voting begins on:
Vibration condition monitoring —
Part 10:
Voting terminates on:
Diagnostic techniques for electrical
generators with fluid film bearings
Surveillance et diagnostic d'état des machines - Surveillance des
vibrations —
Partie 10: Techniques de diagnostic pour les générateurs
électriques de puissance de sortie supérieure à 50 MVA
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 13373-10:2024(en) © ISO 2024
ii
ISO/FDIS 13373-10:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Measurements . 2
4.1 Vibration measurements .2
4.2 Machine operational parameter measurement .2
5 Initial analysis . 2
6 Specific analysis of electrical generators with fluid film bearings . 2
7 Considerations when recommending actions . 3
Annex A (normative) Systematic approach to the vibration analysis of electrical generators
with fluid film bearings — Fault tables . 4
Annex B (informative) Methodology for diagnosing vibration problems in electrical generators
with fluid film bearings . . 8
Annex C (informative) Examples of faults occurring on electrical generators with fluid film
bearings .12
Bibliography .20
iii
ISO/FDIS 13373-10:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to
machines, vehicles and structures.
A list of all parts in the ISO 13373 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/FDIS 13373-10:2024(en)
Introduction
This document provides guidelines for the procedures to be considered when carrying out vibration
diagnostics of electrical generators with fluid film bearings. It is intended to be used by vibration
practitioners, engineers and technicians and it provides them with useful diagnostic tools which include the
use of flowcharts and fault tables.
ISO 20816-2 sets out the criteria for monitoring the vibration of gas turbines, steam turbines and generators
in excess of 40 MW and establishes provisions for evaluating the severity of the in-situ, broad-band vibration.
ISO 13373-1 presents the basic procedures for analysing narrow-band vibration signals. It includes the
types of transducers to be used, their ranges and their recommended mounting locations on various types
of machines, on-line and periodic vibration monitoring systems and potential machinery problems.
ISO 13373-2 includes descriptions of the signal conditioning equipment that is required, the time and
frequency domain techniques that can be used and the waveforms and signatures that represent the most
common machinery operating phenomena or faults encountered when performing vibration signature
analysis.
ISO 13373-3 describes some procedures to determine the causes of vibration problems common to all types
of rotating machines. It includes descriptions of systematic approaches that can be used to characterize
vibration effects, the diagnostic tools available, which tools are needed for particular applications and
recommendations on how the tools can be used for different machine types and components. ISO 13373-3
does not preclude the use of other diagnostic techniques.
Note that ISO 17359 indicates that diagnostics can be
a) started after detection of an anomaly during machine monitoring, or
b) carried out in parallel with machine monitoring.
This document considers only where diagnostics are performed after an anomaly has been detected.
Moreover, this document focusses mainly on the use of flowcharts, process tables, fault and symptom tables
as diagnostic tools, since it is felt that these are the tools that are most appropriate for use in the field.
The flowchart and diagnostic process table methodology presents a structured procedure for a person
in the field to diagnose a fault and find its cause. This step-by-step procedure should be able to guide the
practitioner in the vibration diagnostics of the machine anomaly, in order to reach the probable root cause
of this anomaly.
The fault tables present a list of the most common faults in machinery, as well as their manifestations in the
machine and vibration data. The symptom tables contain the main distinguishing vibration features of the
main faults. When used with the flowcharts, the tables assist with the identification of machinery faults.
When approaching a machinery problem that manifests itself as a high or erratic vibration signal, the
diagnosis of the problem should be done in a systematic manner. This document and ISO 13373-3 achieve
this by providing guidance regarding the selection of the measuring tools, analysis tools and their use that
can be used and the step-by-step procedures that can be used to diagnose the problem.
v
FINAL DRAFT International Standard ISO/FDIS 13373-10:2024(en)
Condition monitoring and diagnostics of machines —
Vibration condition monitoring —
Part 10:
Diagnostic techniques for electrical generators with fluid film
bearings
1 Scope
This document gives guidelines and requirements for the procedures to be followed when carrying out
vibration diagnostics of 2- and 4-pole electrical generators of cylindrical pole design with fluid film bearings.
This document does not apply to salient pole design generators.
This document establishes a practical step-by-step vibration-based approach to fault diagnosis.
The requirements of this document should be considered together with those in ISO 13373-4.
2 Normative references
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.
ISO 2041, Mechanical vibration, shock and condition monitoring — Vocabulary
ISO 13372, Condition monitoring and diagnostics of machines — Vocabulary
ISO 13373-1, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 1:
General procedures
ISO 13373-2, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 2:
Processing, analysis and presentation of vibration data
ISO 13373-3:2015, Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part
3: Guidelines for vibration diagnosis
ISO 21940-2, Mechanical vibration — Rotor balancing — Part 2: Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 2041, ISO 13372 and ISO 21940-2 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
ISO/FDIS 13373-10:2024(en)
4 Measurements
4.1 Vibration measurements
Vibration measurements may be obtained using two main categories of transducer:
a) non-contacting (
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Secretariat: DIN .
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Date: 2024-03-07xx
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Condition monitoring and diagnostics of machines — Vibration
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condition monitoring — .
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Part 10:
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Diagnostic techniques for electrical generators with fluid film
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bearings
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Surveillance et diagnostic d'état des machines - Surveillance des vibrations —
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Partie 10: Techniques de diagnostic pour les générateurs électriques de puissance de sortie supérieure à 50
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ISO/FDIS 13373-10:2024(en)
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Header distance from edge: 1.27 cm, Footer distance
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
Commented [eXtyles1]: The reference "ISO 2024" is to a
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
withdrawn standard
at the address below or ISO’s member body in the country of the requester.
Formatted: Default Paragraph Font
ISO copyright office Formatted: Default Paragraph Font
CP 401 • Ch. de Blandonnet 8
Formatted: Indent: Left: 0 cm, Right: 0 cm, Space
CH-1214 Vernier, Geneva
Before: 0 pt, No page break before, Adjust space
Phone: + 41 22 749 01 11
between Latin and Asian text, Adjust space between
EmailE-mail: copyright@iso.org
Asian text and numbers
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland
Formatted: French (France)
Formatted: French (France)
Formatted: FooterPageRomanNumber
ii
ISO/FDIS 13373-10:2024(en)
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: HeaderCentered, Left
Contents
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Measurements . 2
4.1 Vibration measurements . 2
4.2 Machine operational parameter measurement . 2
5 Initial analysis . 3
6 Specific analysis of electrical generators with fluid film bearings . 3
7 Considerations when recommending actions . 3
Annex A (normative) Systematic approach to the vibration analysis of electrical generators with fluid
film bearings — Fault tables . 5
Annex B (informative) Methodology for diagnosing vibration problems in electrical generators with
fluid film bearings . 9
Annex C (informative) Examples of faults occurring on electrical generators with fluid film bearings
.................................................................................................................................................................................................... 13
Bibliography . 21
Foreword iv
Introduction v
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Measurements 2
4.1 Vibration measurements 2
4.2 Machine operational parameter measurement2
5 Initial analysis 2
6 Specific analysis of electrical generators with an output over 50 MVA 3
7 Considerations when recommending actions 3
Annex A (normative) Systematic approach to the vibration analysis of electrical generators with an output
over 50 MVA — Fault table 4
Annex B (informative) Methodology for diagnosing vibration problems in electrical generators with an output
Formatted: Font: 10 pt
over 50 MVA 11
Formatted: Font: 10 pt
Annex C (informative) Examples 12
Formatted: Font: 10 pt
C.1 Shaft misalignment 12
Formatted: FooterCentered, Left, Line spacing: single
C.2 Hydrogen seal rub 12
Formatted: Font: 11 pt
C.3 Thermal sensitivity – Slip layer malfunction 14
Formatted: FooterPageRomanNumber, Left, Space
After: 0 pt, Line spacing: single
© ISO 2024 – All rights reserved
iii
ISO/FDIS 13373-10:2024(en)
Formatted: Font: Bold
Formatted: HeaderCentered
Foreword Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents.www.iso.org/patents. ISO shall not be held responsible for identifying any or all such
Commented [eXtyles2]: The URL
https://www.iso.org/patents has been redirected to
patent rights.
http://www.iso.org/iso-standards-and-patents.html. Please
verify the URL.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to
machines, vehicles and structures.
A list of all parts in the ISO 13373 series can be found on the ISO website.
Commented [eXtyles3]: Invalid reference: "ISO 13373
series"
Any feedback or questions on this document should be directed to the user’s national standards body. A
Formatted: Default Paragraph Font
complete listing of these bodies can be found at www.iso.org/members.htmlwww.iso.org/members.html.
Formatted: Default Paragraph Font
Formatted: Default Paragraph Font
Formatted: FooterPageRomanNumber
iv
ISO/FDIS 13373-10:2024(en)
Formatted: Font: 11 pt, Bold
Formatted: Font: Bold
Formatted: HeaderCentered, Left
Introduction
This document provides guidelines for the procedures to be considered when carrying out vibration
diagnostics of electrical generators with fluid film bearings. It is intended to be used by vibration practitioners,
engineers and technicians and it provides them with useful diagnostic tools which include the use of
flowcharts and fault tables.
ISO 20816--2 sets out the criteria for monitoring the vibration of gas turbines, steam turbines and generators
Formatted: Default Paragraph Font
in excess of 40 MW and establishes provisions for evaluating the severity of the in-situ, broad-band vibration.
Formatted: Default Paragraph Font
Formatted: Default Paragraph Font
ISO 13373--1 presents the basic procedures for analysing narrow-band vibration signals. It includes the types
of transducers to be used, their ranges and their recommended mounting locations on various types of
Formatted: Default Paragraph Font
machines, on-line and periodic vibration monitoring systems and potential machinery problems.
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ISO 13373--2 includes descriptions of the signal conditioning equipment that is required, the time and Formatted: Default Paragraph Font
frequency domain techniques that can be used and the waveforms and signatures that represent the most
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common machinery operating phenomena or faults encountered when performing vibration signature
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analysis.
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ISO 13373--3 describes some procedures to determine the causes of vibration problems common to all types
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of rotating machines. It includes descriptions of systematic approaches that can be used to characterize
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vibration effects, the diagnostic tools available, which tools are needed for particular applications and
recommendations on how the tools can be used for different machine types and components. ISO 13373--3
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does not preclude the use of other diagnostic techniques.
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Note that ISO 17359 indicates that diagnostics can be:
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a) a) started after detection of an anomaly during machine monitoring;, or
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b) b) carried out in parallel with machine monitoring.
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This document considers only where diagnostics are performed after an anomaly has been detected.
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Moreover, this document focusses mainly on the use of flowcharts, process tables, fault and symptom tables
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as diagnostic tools, since it is felt that these are the tools that are most appropriate for use in the field.
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The flowchart and diagnostic process table methodology presents a structured procedure for a person in the
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field to diagnose a fault and find its cause. This step-by-step procedure should be able to guide the practitioner
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in the vibration diagnostics of the machine anomaly, in order to reach the probable root cause of this anomaly.
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The fault tables present a list of the most common faults in machinery, as well as their manifestations in the
machine and vibration data. The symptom tables contain the main distinguishing vibration features of the
main faults. When used with the flowcharts, the tables assist with the identification of machinery faults.
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When approaching a machinery problem that manifests itself as a high or erratic vibration signal, the diagnosis
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of the problem should be done in a systematic manner. This document and ISO 13373--3 achieve this by
providing guidance regarding the selection of the measuring tools, analysis tools and
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