IEEE C37.34e-1979
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
07-23-2013
English
03-27-1991
2.5 Switching-impulse tests of extra-high-voltage
switches
2.5.1 Equipment to be tested
2.5.2 Mounting arrangement
2.5.3 Electric conductors
2.5.4 Proximity of other objects
2.5.5 Points of application voltage
2.5.6 Number and magnitude of voltage applications
2.5.7 Wave shape for switching-impulse voltage tests
2.5.8 Determination of 50% (critical) flashover
voltage
2.5.9 Statistical switching-impulse insulation level
2.5.10 Atmospheric conditions
2.5.10.1 Standard reference atmosphere
2.5.10.2 Relative air density
2.5.10.3 Water-vapor pressure
2.5.10.4 Dry-test correction factors
2.5.10.5 Wet-test correction factors
2.6 Open-gap insulation coordination
2.7 References
2.8 Bibliography
Appendix
A Modified linear regression method for
evaluation of probability test information
Figures
1 Relative air density (RAD)
2 Humidity voltage correction factor
Appendix Tables
A1 Determination of dispersion and withstand
A2 Table to determine dn
A3 Probability table
Appendix Figures
A1 Sample probability
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