CREEPAGE AND CLEARANCE DISTANCES IN ELECTRICAL EQUIPMENT FOR SHIPBOARD USE

The influence of a number of ionic liquid contaminants and of some oils upon the tracking behavior of three typical insulants, (phenolic-bonded paper board, cellulose-filled alkyd molding and glass-filled polyester dough molding compound) was measured in terms of electrode separation (creepage) and resistance to tracking as determined by the wet contamination test of IEC 112. For any one contaminant the IEC test predicts the correct order of the tracking resistance of the insulants, but the effects of different contaminants is not consistent between materials. Increasing the electrode separation seldom produces a pro rata increase in the time required to track insulation, whereas using a higher CTI material will always reduce the chance of tracking. The influence of contamination upon flashover distance (clearance) is shown to be small.

• Corporate Authors:

  Institute of Electrical and Electronics Engineers (IEEE)

  3 Park Avenue, 17th Floor
  New York, NY  United States  10016-5997
• Authors:
  • Day, A G
  • Stonard, D J
• Publication Date: 1977-6

Media Info

• Features: References;
• Pagination: p. 191-199
• Serial:
  • IEEE Transactions on Electrical Insulation
  • Volume: EI-1
  • Issue Number: 3
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Subject/Index Terms

• TRT Terms: Contaminants; Electric insulating materials; Electrical equipment; Insulators (Electricity); Ships
• Uncontrolled Terms: Contamination
• Old TRIS Terms: Electric insulators; Electrical insulation
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00170114
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Mar 7 1978 12:00AM