Even though most protective system designs are built around individual components, system-wide disturbances in power systems are rather a frequent…
Power quality may be affected by a number of issues. Our discussion in this article focuses on various devices and…
Power quality has become an important issue to electricity consumers at all levels of consumption. This has especially been intensified…
This category of AC drives that is often referred to as “Variable Frequency Inverters” is one of the most extensively…
In vacuum circuit breakers, vacuum typically at pressures ranging from 10-9 to 10-6 bar is used as the quenching medium.…
DC to DC power converters also referred to as choppers provide the means to change one DC voltage to another.…
Grounding or earthing an electrical system is the process of connecting all metalwork/frame of electrical equipment i.e. the non-current carrying…
Switchgear generally refers to the switching devices and their combinations, with the related control, measuring, protective and regulating equipment. The…
Air-blast circuit breakers utilize a blast of compressed air typically at a pressure of 25–75 bar, which is directed across…
Generally protective equipment testing may be divided into three stages: Factory tests. Commissioning tests. Periodic maintenance tests. Factory and commissioning…