Valve Type Lightning Arrester and Over-Voltages | Electrical Engineering
Valve type lightning arrester is also called a nonlinear diverter. Such an arrester consists essentially of a divided spark gap in series with a resistance element having nonlinear characteristics. The divided spark gap consists of a number of identical elements coupled in series, each of them consisting of two electrodes with pre-ionization device; between each element a grading resistor of [...]