Valve arrester protecting AC, DC power network from overvoltage - has arcing horns between turns of single helical blade forming walls of arc extinction chamber

摘要

The valve arrester comprises a serial arrangement which includes at least one nonlinear resistor and spark gaps implemented as arcing horns which are housed in slit-type arc extinction chambers whose walls are made of an electric insulation material. The walls are implemented in the form of a single helical blade arranged on a centra cylindrical member and adapted to produce a single helical arc which is formed from arcs struck in the spark gaps during the arrester breakdown. The arcs being joined together during their movement. The arcing horns are situated between the turns of the helical blade, assuming a helical space orientation, and being affixed to the surface of the central cylindrical member. The nonlinear resistor should be inserted between the adjacent spark gaps and is shunted at the point in time when a single arc is formed, thus providing for an increase in the arrester carrying capacity.