Determination of Peak Operating Voltage For Low Tension Aircraft Cable
Abstract
The need to increase the operating voltages in aircraft has necessitated investigation of the effects of high voltages on the insulation of low tension aircraft type cable. Accordingly, reference (a) requested a determination of corona starting and extinction voltages at sea level pressure and normal room temperature conditions; the effect of impressed high voltages upon the insulation resistance and voltage breakdown characteristics of the insulation for a given period of time; the effect of temperature and humidity upon the insulation resistance and voltage breakdown of the cable's insulating materials; and finally, the effect of the standard life cycle test for cable upon the breakdown voltage of the cable's insulation when conducted in an air pressure simulating 50,000 feet altitude. The results of this study indicate that 600 volts R.M.S. is the peak operating voltage obtainable without detrimental effect upon the insulating qualities of the cable. It also indicates a definite need for a standard qua1ification test which will determine the cable's insulation resistance after it has been exposed to moisture for a specified period of time. Results of this investigation also indicate that several manufacturers 1 cable failed to pass the life cycle qualification test under which t hey were originally approved.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 07, 1946
- Accession Number
- AD1199980
Entities
People
- Arthur A. Daush
- William A. Ritchie
Organizations
- United States Naval Research Laboratory