Method and device for detecting and locating insulation/isolation defects between conductors

Abstract

A system that finds breaches in solid insulation, as well as detecting insufficient air gaps between conductors. The invention solves problems in how to detect breaks in solid insulation by applying high voltages without damaging the solid insulation. The invention also overcomes limitations where the voltages required to detect an insufficient air-gap can cause damage to, or are difficult to apply to the electrical device under test. The system for testing conductors held physically separated or otherwise isolated from each other by an insulating material is composed of a high-voltage breakdown tester, a means of connecting the tester to the conductors, and an added gas that is used to displace air in the proximity of the conductors. Optionally additional conductors or probes are placed in proximity to the original conductors to: 1) find breaks in the solid insulation of one or more conductors, or 2) detect intended air-gaps or mechanical position in the DUT that have insufficient spacing to the additional conductors. The gas conducts current or arcs at a lower voltage gradient than air, which allows detection of insulation and isolation defects better and earlier than testing performed in ambient air conditions.