StandardDetails

This standard is concerned with the construction and use of sphere-gaps for voltage measurement. The rules apply to the measurement of the peak value of: a) Alternating voltages. b) Full standard impulses as defined in GS ...../..... “High Voltage Test Techniques and Impulses with Longer Tails”. c) Direct voltages. The peak value of the disruptive voltages in air for various spacings between the spheres are given in Tables (1) and (2), see Appendix B. Appendix A gives the limits of voltage and frequency over which the Table have been derived from experiments and can be presumed to be accurate within the tolerances specified in 5.2. Appendix B gives the procedure by which the values in the Tables have been derived from previous national standards and other sources.