In this article we will discuss about mechanism of lightning and over-voltages caused by it. Benjamin Franklin performed his famous experiment of flying kite in thunder cloud in 1745. Before his discovery the lightning used to be considered to be "Act of God." He also proved that the lightning stroke is because of the discharge of electricity. He also invented [...]
Thyrite arrester is most common and is mostly used for the protection against high dangerous voltages. It operates on the fact that thyrite, a dense inorganic compound of ceramic nature, has high resistance decreasing rapidly from high value to low value for currents of low value to those of high value. The current increases 9.6 times on doubling the voltage. [...]
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 [...]
The following points highlight the top nine types of surge diverters. The types are: 1. Rod Gap Arrester 2. Sphere Gap Arrester 3. Horn Gap Arrester 4. Multiple-Gap Arrester 5. Impulse Protective Gap 6. Electrolytic Arresters 7. Auto-Valve Arrester 8. Oxide Film Arrester 9. Metal Oxide Lightning Arresters. Type # 1. Rod Gap Arrester: This is the simplest form of [...]