TESTING INSULATION PROPERTIES OF SOUTH AFRICAN RAILWAYS 3KV DC TRACTION MOTOR ARMATURES

The development of the methods to determine the insulation characteristics of traction motor armatures, with a view to increasing service life expectancy, are discussed in this paper. Two tests, namely the measurement of the magnitude of the discharges occurring in armature insulation at maximum electrical stress under normal operating conditions and the measurement of core loss by a capacitor discharge method, are detailed. Go-no-go tests involving Straightforward techniques and interpretations are superficially described. Insufficient failure data has been collected, at this stage, to enable a rigorous statistical analysis of the results; however, a single analysis is presented that indicates that these tests, as applied, will fully realize all aspirations of predicting (within statistical limits) service life expectancy.

• Supplemental Notes:
  • Presented at the Symposium on High Voltage Engineering in South Africa, held in Johannesburg, November 18-19, 1974.
• Corporate Authors:

  Council for Scientific & Industrial Res S Africa

  P.O. Box 395
  Pretoria,   South Africa 
• Authors:
  • Simmons, P R
• Publication Date: 1974

Media Info

• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Direct current motors; Electric insulating materials; Electric locomotives; Insulating materials; Locomotives; Motors; Railroad electrification; Testing; Traction; Traction drives; Vehicle maintenance
• Old TRIS Terms: Locomotive maintenance
• Subject Areas: Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 00148623
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: S-94 Conf Paper
• Files: TRIS
• Created Date: Mar 15 1977 12:00AM