Millman theorems is a circuit analysis theorem that is used to solve parallel voltage sources in circuit. In Millman’s theorem the multiple voltage containinting resistances in respective branches can be reduced. Consider the circuit shown below: Using Millman’s theorem we can reduce the above circuit to a single voltage source and a series resistor: Where … Read more
On the basis of different criteria, electrical voltages can be classified into many classes based on different standards. A general classification of voltage classes and range is shown below: Voltage Class Range Extra-low voltage 0 – 50 kV Low voltage 50 V – 1 kV Medium voltage 1 – 35 kV High voltage 35 – … Read more
A three-phase transformer contains three interconnected coils in the primary and secondary side. Three phase transformers are either connected in delta or wye configuration. In this post, you’ll learn the voltage relationships for delta and wye configuration of transformers. For the sake of simplicity here only the secondary terminals are represented. Three Phase Delta Transformer … Read more
In our homes, the small-sized electrical motors are usually directly started by providing voltages. However, in industries, the power is provided to motors from customized load centers that are used to serve small to midsize motors. Technically these load centers are known as Motors control centers. In this post you’ll learn what are motor control … Read more
A thermal or steam power station converts the heat energy of coal into electrical energy. A thermal power plant is installed in places where coal and water are founded in abundance. An overview of Working Principle In a thermal power station, the steam is produced in the boiler by using the heat of coal combustion. … Read more
Bridge circuits are widely employed in Electrical and Electronics Engineering for measurement purposes. In this post, you’ll learn about electric bridge networks. How it looks The figure below displays a 5 resistor bridge network: It can also be redrawn as: Balanced vs unbalanced bridge In above figure if R1/R3 = R2/R4 then bridge is referred … Read more
The nodal analysis is used to determine the potential different at any node with an arbitrary reference point. In nodal analysis the Kirchhoff’ current law is applied to form linear equations. These linear equations are then solved to find the unknown voltages. Steps for Nodal Analysis Select a reference node and mark it as ground … Read more
In electronic circuits, the amplifier and receiver circuits often require the load the receive maximum amount of power. The maximum power transfer theorem sets the condition for which a load will receive maximum power from a circuit. The load resistance will receive maximum power from a circuit when the resistance of circuit equals the Thevenin … Read more
In Electrical industries, the electric power is supplied to various loads from load centers which contain various protection and control devices. Power Engineers usually refer to this construction as Switchgear. In this article, you’ll learn what is switchgear, its construction and why it is used. What is a Switchgear and Why it is used Switchgear … Read more
Induction motor is a simple, rugged and one of the most popular motors in the electrical industry. Whereas synchronous motor is a complex, comparatively costly motor which requires a lot of maintenance as compared to the induction motor. Both machines are widely employed in the electrical industry and are used for their specific applications. Given … Read more