AC Excitation System - Block diagram and Working Principle: This AC Excitation system consists of an alternator and thyristor rectifier bridge directly connected to the main alternator shaft. The main…
DC Excitation System Working Principle: In dc excitation system, the system has two exciters—the main exciter (a separately excited dc generator providing the field current to the alternator) and a…
Metal Oxide Lightning Arrester: Metal oxide lightning arrester belongs to the new generation of station metal oxide surge arresters developed by General Electric Co. in 1976. This is useful for…
Oxide Film Lightning Arrester: Oxide film lightning arrester operates on the fact that certain dry chemicals have the property to change rapidly from a good conductor to almost perfect insulator…
Thyrite Lightning Arrester Diagram: Thyrite lightning arrester is most common and is mostly used for the protection against high dangerous voltages. It operates on the fact that thyrite, a dense…
Impulse Protective Gap Arrester: It was pointed out that the sphere gap has an impulse ratio of unity, but suffers from the drawback that the arc between its electrodes is…
Carrier Current Protection of Transmission Lines: In modern high-power electrical systems it is necessary to have quick acting protections on long transmission lines. The requirements to be met by such…
Merz Hunter Split Conductor Protection of Feeders: This Merz Hunter Split Conductor Protection of Feeders system is another method of securing the benefits of a balanced method of protection without…