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1 Maszyny Elektryczne : zeszyty problemowe

1 2009

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Partial discharges of thermally aged insulation

Pihera J., Martinek P., Klasna J., Paslavsky B.

Maszyny Elektryczne : zeszyty problemowe

2009

Nr 82

147-151

The working life of electrical machines is primary affected by the insulation system quality. Diagnostics methods help to understand the momentary state of insulation and to avoid the possible damage or breakdown of machines. Partial discharge testing belongs to one of the high applicable test method of insulating materials within electrical machines. The described experiment consists of laboratory thermal aging of insulation and consequently testing of partial discharges. The flat specimens of insulation were used for the partial discharge behavior recognition. The conductive rubber electrodes were used to avoid the gliding discharges on the surface of specimen. The trends of partial discharge main parameters are studied and described.