IEC TS 60034-18-41:2006

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Effects arising from converter operation
5 Electrical stresses in the insulation system of
   machine windings
   5.1 General
   5.2 Voltages stressing the phase/phase insulation
   5.3 Voltages stressing the phase/ground insulation
   5.4 Voltages stressing the turn and strand insulation
   5.5 Mechanisms of insulation degradation
6 Types of machine insulation
7 Stress categories for Type I insulation systems used
   in converter fed machines
8 Qualification and type tests for Type I insulation systems
   8.1 Overview
   8.2 Qualification test
   8.3 Type test
9 Test equipment
   9.1 PD measurement at power frequency
   9.2 PD measurement during voltage impulses
   9.3 Voltage impulse generators
   9.4 Sensitivity
   9.5 PDIV and RPDIV measurement
10 Qualification of Type I insulation systems
   10.1 General
   10.2 Approach
   10.3 Preparation of test objects
   10.4 Qualification test methods
   10.5 Qualification test pass criteria
11 Type test for Type I insulation systems
   11.1 General
   11.2 Type test method
   11.3 Type test pass criteria
12 Analysis, reporting and classification
Annex A (informative) Voltages at the terminals of the
                      converter fed machine
Annex B (normative) Derivation of test voltage values
                    for Type I insulation systems
Bibliography

Defines criteria for assessing the insulation system of stator/rotor windings which are subjected to pulse width modulation drives. Applies to stator/rotor windings of single or polyphase AC machines with insulation systems for converter operation. Describes qualification and type tests on representative samples or on complete machines which verify fitness for operation with voltage source converters.