Breakdown voltage depends on air density and humidity. IEC 60060 provides correction factors:
Accurate measurement is critical. The standard classifies measuring systems into: iec60060
[ K_t = \left( \fracbb_0 \right)^m \times \left( \frachh_0 \right)^q ] Breakdown voltage depends on air density and humidity
To ensure reproducibility and comparability of high-voltage tests across different laboratories and manufacturers by defining: iec60060