Electrical insulation

Details Electrical insulation Electrical insulation

H - Electricity

01

B

337/121

H01B 3/30 (2006.01)

Patent

CA 2008984

16 ABSTRACT An electrical insulation (14, 26, 33, 43, 52) comprises an organic polymer containing a powdered filler and has parts with a thickness of more than 1 mm, which are subjected to a field strength of at least 0.5 kV/mm alternating voltage. The insulation contains a powdered filler in the form of chromium oxide (Cr2O3), iron oxide (Fe2O3), metal phthalocya- nine, or a mixture of at least two substances of these kinds in such a content that the amount of the powdered filler con- stitutes at least 10% of the total volume of the organic polymer and the powdered filler. The electrical insulation may, inter alia, be arranged as an insulation (14) around con- ductor bundles (17) in coils for electrical machines, as insulation (26) between conductor layers (22) in layer-wound transformers, as insulation (33) around core and windings in instrument transformers, as insulation (43) between conductor (40) and grounded casing (41) in SF6-insulated conductors, and as insulation (52) between conductor (50) and grounded screen (54) in a cable. (Figure 2)

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