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IEC 60034-18-41 & IEC 60034-18-42, such standards are now the reference for the design of insulation systems and quality control, establishing types of test waveforms and measurement procedures.
New IEC standards, IEC 60034-18-41 and IEC 60034-18-42, have been issued to define the procedures for testing partial discharge inception voltage and the long-term performance (endurance) of Type I and Type II insulation systems used in rotating machines fed from voltage converters. Voltage impulse generators are required at least to test turn insulation, but they would be recommended for any testing under power electronics supply because of their capability to simulate the real electrical stress conditions. More generally, any type of electrical insulation system when subject to impulsive voltage waveform during life should be carefully evaluated in terms of partial discharge and endurance behavior.This is why voltage impulse generators able to provide impulses with controlled amplitude and frequency are needed to face this new testing challenge.
Design and qualification tests of electrical insulation systems to be used under power electronic waveforms. For Type I insulation, partial discharges are not allowed, thus partial discharge inceptions and extinction tests are mandatory. Limited intensity of partial discharges are permitted for the whole life of Type II insulation, which need, therefore, to be subjected to accelerated life (endurance) tests.
NORMATIVE REFERENCES: 60034-18-41| 60034-18-42 | IEC/TS 61934 | IEC 62068
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