22 Protection against over voltage Horn gap Arrester

Protection against over voltage- Horn gap Arrester,insulated ,gap increases,small air gap,two horns,earth,resistor,choke coil,apparatus to be protection,limit the power follow-on current,inductor or choke,allows less reactance,low frequency, high reactance under over voltage condition,normal condition,spark gap non conducting,heat,arc,magnetic field, arc rises,arc self clearly,self extinguishing,limits the follow on current,bridging of gap,birds,arrester,time lag of 3 seconds,back up protection,