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

What is Conductance?Conductance (also known as electrical conductance) is defined as the potential for a substance to conduct electricity. Conductance is the measure of how easily electrical current (i.e. flow of charge) can pass through a material. Conductance is the inverse (or reciprocal) of electrical resistance, represented as 1/R.To have a better understanding of conductance, one must recall the resistance of an object. In a qualitative sense, the resistance tells us how difficult it is fo

What is Permeance?Permeance is defined as a measure of the ease with which magnetic flux can be admitted through a material or magnetic circuit. Permeance is the reciprocal of reluctance. Permeance is directly proportional to the magnetic flux and is denoted by the letter P.From the above equation we can say that the quantity of magnetic flux for a number of ampere-turns is depended on permeance.In terms of magnetic permeability, permeance is given byWhere, = Permeability of free space (vacuum)

The Star-Delta transformation is a technique in electrical engineering that allows the impedance of a three-phase electrical circuit to be transformed from a “delta” configuration to a “star” (also known as “Y”) configuration, or vice versa. The delta configuration is a circuit in which the three phases are connected in a loop, with each phase connected to the other two phases. The star configuration is a circuit in which the three phases are connected to a common point, or “neutral” point.The S

What is Reluctance?Magnetic reluctance (also known as reluctance, magnetic resistance, or a magnetic insulator) is defined as the opposition offered by a magnetic circuit to the production of magnetic flux. It is the property of the material that opposes the creation of magnetic flux in a magnetic circuit. Reluctance of Transformer Core In an electrical circuit, the resistance opposes the flow of current in the circuit and it dissipates the electric energy. The magnetic reluctance in a magn

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