FIELD: electrical engineering; electrical machine winding insulation. SUBSTANCE: proposed insulating mica tape 11 has one or more layers 4 of layer-forming fabric carrier and mica layer 5. Carrier is produced from longitudinal fibers 7a and transversal fibers 7b whose relative ratio by volume is equal to or greater than 2.5:1 and layer 5 is pure mica layer of high packing density. Ration of mica and layer-forming carrier 11 in mica tape by weight is greater than or equal to 6:1. EFFECT: improved insulating and thermal properties of winding bar insulation. 3 cl, 2 dwg
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