How to distinguish between oil-paper insulation and film-paper composite insulation of capacitive voltage transformer? Is there a difference in appearance or model? thank you
The model is not clear, mainly depending on the production date. After 90 years, it is basically film-paper composite, and only the very old one may be oil-paper insulation. In addition, it can also be distinguished from the appearance. Oil-paper insulation oil is large, and transformer oil is used, so the sheath is thick; Capacitance oil for film-paper composite is small, so the coating is thin.