IEC 60034-18-22:2000

INTERNATIONAL IEC
STANDARD
60034-18-22
Second edition
2000-06
Rotating electrical machines –
Part 18-22:
Functional evaluation of insulation systems –
Test procedures for wire-wound windings –
Classification of changes and insulation
component substitutions
Machines électriques tournantes –
Partie 18-22:
Evaluation fonctionnelle des systèmes d'isolation –
Procédures d'essai pour enroulement à fils –
Classification des modifications et des substitutions
de composants d'isolations
Reference number
Numbering
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Validity of this publication
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thus ensuring that the content reflects current technology.
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Terminology, graphical and letter symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.

INTERNATIONAL IEC
STANDARD
60034-18-22
Second edition
2000-06
Rotating electrical machines –
Part 18-22:
Functional evaluation of insulation systems –
Test procedures for wire-wound windings –
Classification of changes and insulation
component substitutions
Machines électriques tournantes –
Partie 18-22:
Evaluation fonctionnelle des systèmes d'isolation –
Procédures d'essai pour enroulement à fils –
Classification des modifications et des substitutions
de composants d'isolations
 IEC 2000  Copyright - all rights reserved
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For price, see current catalogue

– 2 – 60034-18-22  IEC:2000(E)
CONTENTS
Page
FOREWORD . 3
INTRODUCTION .5
Clause
1 Scope . 6
2 Normative references. 6
3 General guidelines. 6
3.1 Category I insulation components . 6
3.2 Category II insulation components . 7
3.3 Definition of generic identity. 7
4 Documentation. 8
5 General substitution procedures. 8
6 Component substitution category . 8
6.1 Category I component substitution . 8
6.2 Category II component substitution . 10
7 Sealed tube test procedure . 10
7.1 General. 10
7.2 Test apparatus. 11
7.3 Sample preparation. 11
7.4 Contents of tubes. 11
7.5 Preparation of tubes . 12
7.6 Thermal conditioning. 12
7.7 Opening procedure . 12
7.8 Evaluation of samples. 13
7.9 Requirement . 13
Table 1 – Thermal ageing test methods for varnish . 9
Figure 1 – Test apparatus . 14

60034-18-22  IEC:2000(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 18-22: Functional evaluation of insulation systems –
Test procedures for wire-wound windings – Classification of changes
and insulation component substitutions
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60034-18-22 has been prepared by subcommittee 2J:
Classification of insulation systems for rotating machinery, of IEC technical committee 2:
Rotating electrical machines.
This second edition cancels and replaces the first edition published in 1996 of which it
constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
2/1088/FDIS 2/1096/RVD
Full information on the voting for the approval of this standard 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 3.

– 4 – 60034-18-22  IEC:2000(E)
The committee has decided that the contents of this publication will remain unchanged until
2005. At this date, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
A bilingual version of this publication may be issued at a later date.
It forms part of a series under the general title Rotating electrical machines:
Part 18-1:1992, Functional evaluation of insulation systems – General guidelines
Part 18-21:1992, Functional evaluation of insulation systems – Test procedures for wire-
wound windings – Thermal evaluation and classification
Part 18-31:1992, Functional evaluation of insulation systems – Test procedures for form-
wound windings – Thermal evaluation and classification of insulation systems used in
machines up to and including 50 MVA and 15 kV
Part 18-32:1995, Functional evaluation of insulation systems – Test procedures for form-
wound windings – Electrical evaluation of insulation systems used in machines up to and
including 50 MVA and 15 kV
Part 18-33:1995, Functional evaluation of insulation systems – Test procedures for form-
wound windings – Multifactor functional evaluation – Endurance under combined thermal and
electrical stresses of insulation systems used in machines up to and including 50 MVA
and 15 kV
60034-18-22  IEC:2000(E) – 5 –
INTRODUCTION
IEC 60034-18-1 presents general principles for evaluation and classification of insulation
systems used in rotating electrical machines. Unless the procedures of this part indicate
otherwise, the principles of IEC 60034-18-1 should be followed.
IEC 60034-18-21 deals with the thermal evaluation and classification of insulation systems
for wire-wound windings in respect of normal procedures as referred to in 5.3.2.1 of
IEC 60034-18-1.
This part of IEC 60034 is concerned with procedures of verification of the effects of changes
in insulation systems for wire-wound windings covered by 5.3.2.2 of IEC 60034-18-1.

– 6 – 60034-18-22  IEC:2000(E)
ROTATING ELECTRICAL MACHINES –
Part 18-22: Functional evaluation of insulation systems –
Test procedures for wire-wound windings – Classification of changes
and insulation component substitutions
1 Scope
This part of IEC 60034 gives test procedures for the thermal evaluation and classification of
changes and insulation component substitution in insulation systems used or proposed for
use in a proven insulation system used in wire-wound windings. The test procedures are
comparative in that the performance of a candidate system is compared to that of a reference
system which has previously been proved by experience or has been evaluated by one of the
procedures given in 60034-18-21 and to which the change or substitution is intended.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this International Standard. For dated references, subsequent
amendments to, or revisions of, any of these publications do not apply. However, parties to
agreements based on this International Standard are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of IEC
and ISO maintain registers of currently valid International Standards.
IEC 60034-18-21:1992, Rotating electric machines – Part 18: Functional evaluation of
insulation systems – Section 21: Test procedures for wire-wound windings – Thermal
evaluation and classification
IEC 60172:1987, Test procedure for the determination of the temperature index of enamelled
winding wires
IEC 60216, Guide for the determination of thermal endurance properties of electrical
insulating materials
IEC 60317, Specifications for particular types of winding wires
IEC 61033:1991, Test methods for the determination of bond strength of impregnating agents
to an enamelled wire substrate
3 General guidelines
3.1 Category I insulation components
3.1.1 Phase insulation and ground insulation
Insulation separating the windings from each other or from the magnetic core, for example
slot liners, but not wedges, closures or top of slot packers all of which are considered as
category II components (see 3.2).

60034-18-22  IEC:2000(E) – 7 –
3.1.2 Turn (conductor) insulation
The resinous (enamel) coating or wrapped insulation, fibrous or film, on winding wire.
3.1.3 Impregnating varnishes
These include both solvented and solventless varnishes.
3.1.4 Encapsulant
Moulded or cast insulation which completely encases the insulation system and which is the
only barrier between the winding and the outer surface of the motor.
3.2 Category II insulation components
Category II components include any constituent of an insulation system not covered by 3.1,
as listed below. If the testing organization wants to consider some of these components as
category I insulation components, it may do so.
a) Series/parallel winding insulation as used on multi-voltage windings
b) Insulation between auxiliary and main winding as used on single-phase
...