Humidity Influence on Switching-Impulse Breakdown Voltage of Air Gaps for Indoor High-Voltage Installations

摘要

A correction procedure recommended by IEC is commonly used for converting the measured voltage or the test voltage from non-standard to standard reference atmosphere, or vice versa. The applicability of the humidity correction on relative uniform gap is not clear. In this paper results from newly performed laboratory test on air gaps of different uniformity under different atmosphere are presented. Comparison is made between the outcomes of the IEC recommended corrections for these results.