Assessment of the non-destructive nature of PASD on wire insulation integrity.

Lockner, Thomas Ramsbeck ; Peña, Gary Edward ; Schneider, Larry X. ; Higgins, Matthew B. ; Glover, Steven Frank

Sandia National Laboratories

关键词: Wires;    Breakdown;    Nondestructive Testing;    Electrical Insulation;    Electric Discharges;   

DOI  :  10.2172/918342
RP-ID  :  SAND2003-3430
RP-ID  :  AC04-94AL85000
RP-ID  :  918342

美国|英语

来源: UNT Digital Library

【 摘 要 】

The potential of a new cable diagnostic known as Pulse-Arrested Spark Discharge technique (PASD) is being studied. Previous reports have documented the capability of the technique to locate cable failures using a short high voltage pulse. This report will investigate the impact of PASD on the sample under test. In this report, two different energy deposition experiments are discussed. These experiments include the PASD pulse ({approx}6 mJ) and a high energy discharge ({approx}600 mJ) produced from a charged capacitor source. The high energy experiment is used to inflict detectable damage upon the insulators and to make comparisons with the effects of the low energy PASD pulse. Insulator breakdown voltage strength before and after application of the PASD pulse and high energy discharges are compared. Results indicate that the PASD technique does not appear to degrade the breakdown strength of the insulator or to produce visible damage. However, testing of the additional materials, including connector insulators, may be warranted to verify PASDs non-destructive nature across the full spectrum of insulators used in commercial aircraft wiring systems.