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Surface discharges on contaminated epoxy insulators

1989; Institute of Electrical and Electronics Engineers; Volume: 24; Issue: 2 Linguagem: Inglês

10.1109/14.90280

1557-962X

Dieter König, I. Quint, Peter Rösch, Bernhard C. Bayer,

Advanced Sensor and Energy Harvesting Materials

Moisture layers with low layer conductivity are characterized by low power dissipation, e.g. 50 mW for the epoxy resin model post insulator under investigation. Under those conditions, no temperature-related dry zones appear, but micro partial discharges (PDs) cannot be excluded. The appearance of these discharges depends on the voltage stress, the surface properties, and the relevant climatic conditions. Experiments on moisture layers with low layer conductivity have been performed in test setups under well-controlled conditions. Typical patterns of the PD behavior could be established and simulated with the help of simplified equivalent-circuit diagrams. >