BS EN 60034-18-42:2017

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Machine terminal voltages arising from
   converter operation
5 Electrical stresses in the insulation system
   of machine windings
6 Voltage rating for Type II insulation systems
7 Stress factors for converter-fed Type II
   insulation systems
8 Qualification tests
9 Qualification of mainwall insulation system
10 Qualification of turn insulation
11 Qualification of the stress control system
12 Preparation of test objects
13 Qualification test procedures
14 Qualification test pass criteria
15 Routine test
16 Optional screening tests
17 Analysis, reporting and classification
Annex A (informative) - Contributions to ageing of the
        mainwall insulation
Annex B (informative) - Examples of circuits for
        impulse testing
Annex C (informative) - Derivation of the short
        term endurance test voltage
Annex D (informative) - Derivation of the impulse
        voltage insulation class for the machine insulation
Annex E (normative) - Derivation of an IVIC in the
        absence of a manufacturers reference life line
Annex F (informative) - Optional screening tests
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

Specifies 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 those generated by pulse width modulation (PWM) converters, and are expected to experience and withstand partial discharge activity during service.

IEC60034-18-42:2017 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 those generated by pulse width modulation (PWM) converters, and are expected to experience and withstand partial discharge activity during service. It specifies electrical qualification tests on representative specimens to verify fitness for operation with voltage-source converters. It also describes an additional classification system which defines the limits of reliable performance under converter-fed conditions.