The multiple chopping gap is a originally patented
SAMGOR development and is used to chop lightning
impulses (on the front and on the tail) as well as switching
impulses up to the highest voltages.
The multiple chopping gap serves simultaneously as a
load capacitor for the impulse generator and allows
excellent reproducibility of the chopping time and does not
distort the wave shape until the chopping point.
With a additional secondary unit the SGFS is also usable
for some applications as a voltage divider.
Rod gaps and sphere gaps (above 1000 kV) draw a
substantial pre-discharge current prior to the voltage
break-down, causing a voltage drop. This affects the
comparison tests when testing power transformers.