The invention relates to a flat gap
lightning arrester based on short arc potential drop and near
cathode effect stacking; the flat gap
lightning arrester comprises an insulation core rod, a plurality of flat
discharge electrodes axially sleeving the insulation core rod, a fixed seat arranged on the
low voltage end of the insulation core rod, a
low voltage electrode inserted into the fixed seat, a main gap
discharge electrode arranged on the insulation core rod
high voltage end, and a
silicone rubber oversheath made by a
silicone rubber sulfuration technology, wherein the
silicone rubber oversheath is used for fixing the insulation core rod, the plurality of flat
discharge electrodes, the fixed seat, and the main gap discharge
electrode; the plurality of flat discharge electrodes are evenly arranged in parallel; no
zinc oxide resistance card is needed, thus providing green and
environmental protection effect, and solving the problems that the
zinc oxide resistor disc is prone to fail and get wet; the arc extinguishing mechanism comprises near
cathode effect stacking, near
electrode potential drop stacking and chamber
arc blow-out, thus effectively reducing the arc over rate caused by
lightning stroke on an aerial conductor, and effectively reducing the line lightning
stroke trip-out rate under extreme conditions like a heavy
thunder area and severe
moisture and
dirty environment.