OPERATIONAL EXPERIENCE WITH HIGH-VOLTAGE MACHINES HAVING TOTALLY IMPREGNATED WINDINGS

About 10 years ago the insulation of medium-sized rotating high-voltage machines was revolutionized by the introduction of a system consisting of a continuous thermosetting resin insulation with which the stator iron is impregnated under vacuum together with the winding. The main insulation is made of glass fabric and mica paper impregnated with a modified, solvent-free synthetic resin. At the same time the end-coil supports were completely redesigned; this represented a decisive improvement in the reliability of these machines, as is confirmed by successful experience with several thousand machines which have been in service for years. This article explains special operating conditions, describes practical results, and indicates possible points to be inspected. As a result of favourable experience with this insulation, machines of ratings up to and exceeding 50 Mw are now being built with this insulation.

• Corporate Authors:

  Brown Boveri and Company Limited

  Publicity Department
  Baden,   Switzerland 
• Authors:
  • Schuler, R H
  • Gribet, J
  • Scheel, J
• Publication Date: 1976-8

Media Info

• Serial:
  • Brown Boveri Review
  • Volume: 63
  • Issue Number: 8
  • Publisher: Brown Boveri and Company Limited

Subject/Index Terms

• TRT Terms: Electric insulating materials; Electrical equipment; Insulating materials; Machinery; Motors; Polymers; Traction; Traction drives
• Old TRIS Terms: Electrical insulation
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00156229
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Jul 19 1977 12:00AM