Testing
Exhaustive testing has proven that
- the internal spark gap operates under surge conditions to protect the transformer winding
- the arc is extinguished under high available fault current conditions, and
- the operation of the internal spark gap, under maximum oil temperature conditions, and with a wide range of oil vapor to air ratios, does not result in the development of an unsafe condition.
This extensive testing proves conclusively that the internal spark gap provides the same degree of protection as that provided by interlaced secondary windings, low voltage MOV arresters, and external spark gaps.
