IEC TS 60034-18-42:2008

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Voltage effects from converter operation
   4.1 Voltages at the terminals of the converter-fed machine
   4.2 Electrical stresses in the insulation system of machine
        windings
        4.2.1 General
        4.2.2 Voltages stressing the phase/phase insulation
        4.2.3 Voltages stressing the phase/ground insulation
        4.2.4 Voltages stressing the turn insulation
5 Type II insulation systems
6 Stress factors for converter-fed Type II insulation systems
7 Qualification and acceptance tests
   7.1 General
   7.2 Qualification tests
   7.3 Acceptance test
8 Qualification of turn insulation
   8.1 General
   8.2 Test methods
9 Qualification of ground wall insulation systems
   9.1 General
   9.2 Test methods
   9.3 Use of 50 Hz or 60 Hz life data to predict the service
        life with a converter drive
10 Qualification of the stress control and corona protection
   system
   10.1 General
   10.2 Test methods
11 Preparation of test objects
   11.1 General
   11.2 Turn/turn samples
   11.3 Coils
12 Qualification test procedures
   12.1 General
   12.2 Turn/turn samples
   12.3 Coils
   12.4 Stress control samples
13 Qualification test pass criteria
   13.1 Turn/turn samples
   13.2 Coil samples
   13.3 Stress control samples
14 Acceptance test for Type II insulation systems (Type test)
   14.1 General
   14.2 Acceptance test methods
   14.3 Acceptance test pass criteria
15 Analysis, reporting and classification
Annex A (informative)
Annex B (informative)
Annex C (informative)

IEC/TS 60034-18-42:2008 defines criteria for assessing the insulation system of stator/rotor windings of single or polyphase AC machines which are subjected to repetitive impulse voltages, such as pulse width modulation converters, and expected to withstand partial discharge activity during service. It specifies electrical qualification and acceptance tests on representative samples which verify fitness for operation with voltage-source converters.