Abstract-High voltage switching operations radiate large electromagnetic
fields. These cause interference to sensitive electronic equipment.
For example, the environment of most concern are those of high voltage
substations and high voltage research laboratories. This paper evaluates
electric and magnetic field measurements obtained during the breakdown
of an SF6 gas gap when a 4/400 us pulse was applied from a high-voltage
impulse generator. Building upon previous work [4] concerning initial
results in terms of the E-dot and H-dot measurements, this paper also
includes the evaluation of the E and H field magnitudes to determine the
extent of equipment interference within the vicinity of switching/pulse operations.
In addition, these laboratory results were extrapolated to allow
comparisons to be made with results from previous studies investigating
switching operations within a substation environment. The implications
regarding EMC immunity standards and the level of interference is
discussed.