IEC TS 60034-18-42:2008

IEC/TS 60034-18-42
Edition 1.0 2008-08
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Rotating electrical machines –
Part 18-42: Qualification and acceptance tests for partial discharge resistant
electrical insulation systems (Type II) used in rotating electrical machines fed
from voltage converters
Machines électriques tournantes –
Partie 18-42: Essais de qualification et d’acceptation des systèmes d’isolation
électrique résistants aux décharges partielles (Type II) utilisés dans des
machines électriques tournantes alimentées par convertisseurs de tension

IEC/TS 60034-18-42:2008
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IEC/TS 60034-18-42
Edition 1.0 2008-08
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Rotating electrical machines –
Part 18-42: Qualification and acceptance tests for partial discharge resistant
electrical insulation systems (Type II) used in rotating electrical machines fed
from voltage converters
Machines électriques tournantes –
Partie 18-42: Essais de qualification et d’acceptation des systèmes d’isolation
électrique résistants aux décharges partielles (Type II) utilisés dans des
machines électriques tournantes alimentées par convertisseurs de tension

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 29.160 ISBN 2-8318-9966-4
– 2 – TS 60034-18-42 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Voltage effects from converter operation .10
4.1 Voltages at the terminals of the converter-fed machine .10
4.2 Electrical stresses in the insulation system of machine windings .13
4.2.1 General .13
4.2.2 Voltages stressing the phase/phase insulation.14
4.2.3 Voltages stressing the phase/ground insulation .14
4.2.4 Voltages stressing the turn insulation .14
5 Type II insulation systems .14
6 Stress factors for converter-fed Type II insulation systems .15
7 Qualification and acceptance tests .16
7.1 General .16
7.2 Qualification tests.16
7.3 Acceptance test.17
8 Qualification of turn insulation .17
8.1 General .17
8.2 Test methods .17
9 Qualification of ground wall insulation systems.19
9.1 General .19
9.2 Test methods .19
9.3 Use of 50 Hz or 60 Hz life data to predict the service life with a converter
drive.20
10 Qualification of the stress control and corona protection system.21
10.1 General .21
10.2 Test methods .22
11 Preparation of test objects.23
11.1 General .23
11.2 Turn/turn samples .23
11.3 Coils.24
12 Qualification test procedures .24
12.1 General .24
12.2 Turn/turn samples .24
12.3 Coils.24
12.4 Stress control samples .25
13 Qualification test pass criteria .25
13.1 Turn/turn samples .25
13.2 Coil samples .25
13.3 Stress control samples .26
14 Acceptance test for Type II insulation systems (Type test).26
14.1 General .26
14.2 Acceptance test methods .26

TS 60034-18-42 © IEC:2008 – 3 –
14.3 Acceptance test pass criteria.26
15 Analysis, reporting and classification .26
Annex A (informative) .27
Annex B (informative) .29
Annex C (informative) .31
Figure 1 – Voltage impulse waveshape parameters .10
Figure 2 – Phase/phase voltage at the terminals of a machine fed by a 3-level
converter .11
Figure 3 – Possible jump voltages (U ) at the machine terminals associated with a
j
converter drive.12
Figure 4 – Maximum voltage enhancement at the machine terminals as a function of
cable length for various impulse rise times for a 2-level converter.13
Figure 5 – Design examples.14
Figure 6 – Life lines of turn and mainwall insulation. .18
Figure 7 – Example of a life curve for a Type II mainwall insulation system.21
Figure 8 – Example of the construction of a turn/turn test sample for rectangular
conductors.23
Figure A.1 – Example of a simple converter voltage simulation circuit.27
Figure A.2 – Typical waveform generated from the spark gap oscillator .28
Figure B.1 – Representation of the phase to ground voltage at the terminals of a
machine fed from a 3-level converter .29
Table 1 – Influence of features of the converter drive voltage on acceleration of ageing
of components of Type II insulation systems.15
Table B.1 – Contribution to electrical ageing by 1 kHz impulses from a 3-level
converter as a percentage of the ageing from the 50 Hz fundamental voltage for
various values of voltage endurance coefficient (n).30

– 4 – TS 60034-18-42 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 18-42: Qualification and acceptance tests for partial
discharge resistant electrical insulation systems (Type II) used
in rotating electrical machines fed from voltage converters
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standar
...