5.3 Standard impulse withstand voltage tests
A standard impulse withstand voltage test consists of a specified number of applications of
the relevant standard withstand voltage to the terminals of the insulation configuration.
Different test procedures may be selected to demonstrate that the withstand voltages are
met with a degree of confidence that experience has shown to be acceptable.
The test procedure shall be selected by the apparatus committees from the following test
procedures which are standardized and fully described in IEC 60-1 :
- Three-impulse withstand test in which no disruptive discharge is tolerated.
- Fifteen-impulse withstand test in which up to two disruptive discharges on the
self-restoring insulation are tolerated.