Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

The method of connecting non-current carrying portions to earth or ground, such as the metallic frame of an electrical device or certain electrical components of a power system, such as the neutral point ofstar-connected system, is known as grounding, also referred to as earthing.To avoid accidents &damage to the system’s equipment, electrical systems should always be grounded.This postwill discuss grounding conductors and how to determine the appropriate size for a grounding conductor based

For the purpose of accurately representing a specific electrical system or circuit in Electrical and Electronics Engineering, many forms of drawings and diagrams are used.These electrical circuits are shown using lines, which stand in for wires, and symbols or icons, which are used to represent the various electrical &electronic components.It is helpful to acquire a better knowledge of the link between the various components. When wiring a structure, electricians will make use of something c

What is Nominal Voltage?Nominal voltage is a value assigned to a circuit or system to designate its voltage class conveniently(e.g. 120/240 volts, 300 volts, 480Y/277 volts). The actual voltage at which a circuit operates can vary from the nominal voltage within a range that permits satisfactory operation of equipment.The word “nominal” means “named”. It is not the precise operating or rated voltage. i.e. a 240-volt circuit may not be precisely 240.0000 volts, and may instead operate at 235.4 vo

What is an SWR Meter?A standing wave ratio meter – also known as an SWR meter, ISWR meter (current “I” SWR), or VSWR meter (voltage SWR) – is defined as a device that measures the standing wave ratio (SWR) in a transmission line. The SWR meter indirectly measures the degree of mismatch between a transmission line and its load (usually an antenna). This is helpful to know the effectiveness of the impedance matching performed by technicians.SWR meter helps to determine how much of radiofrequency e

What is a Current Divider?A current divider is defined as a linear circuit that produces an output current that is a fraction of its input current. This is achieved through the connection of two or more circuit elements connected in parallel, the current in each branch will always divide in such a way that the total energy expended in a circuit is minimum.In other words, in a parallel circuit, the supply current splits into a number of parallel paths. It is also known as the “current divider rul

What is Voltage?Voltage (also known as electric potential difference, electromotive force emf, electric pressure, or electric tension) is defined as the electric potential difference per unit charge between two points in an electric field. Voltage is expressed mathematically (i.e. in formulas) using the symbol “V” or “E”.If you’re looking for a more intuitive explanation to help explain what voltage is, skip to this section of the article.Otherwise, we’ll continue below with a more formal defini

What is meant byElectronic Ballast?An electronic ballast, also referred to as an electrical ballast, is a component of equipment that controls the starting voltage & currents of the lighting fixtures.This is accomplished by the use of the electrical gas discharge technique. To start the gas discharge method in fluorescent lamps, an electronic ballast converts the power frequency to a very high frequency by managing the voltage across the bulb and current through the lamp.Block Diagram of Ele

What is Electric Current?Electric current is defined as a stream of charged particles—such as electrons or ions—moving through an electrical conductor or space. It is the flow rate of electric charge through a conducting medium with respect to time. Electric current is expressed mathematically (e.g. in formulas) using the symbol “I” or “i”. The unit for current is is ampere or amp. This is represented by A.Mathematically, the flow rate of charge with respect to time can be expressed as,In other

Moore’s Law is a prediction made by Gordon Moore, co-founder of the technology company Intel, in 1965 that the number of transistors on a microchip would double approximately every two years. This prediction has proven to be remarkably accurate, and has served as a driving force in the rapid development of the technology industry for more than 50 years. Moore’s Law is based on the idea that the number of transistors that can be placed on a microchip will increase exponentially over time, as the

What is RMS Voltage?The word RMS stands for Root Mean Square. An RMS voltage is defined as the square root of the mean square of instantaneous values of the voltage signal. The RMS is also known as the quadratic mean. RMS voltage can also be defined for a continuously varying voltage in terms of an integral of the squares of the instantaneous values during a cycle.The RMS value is most important in the case of an AC signal. Because the instantaneous value of an AC signal varies continuously with