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Ratings of a Lightning Arrester

March 5, 2020March 3, 2020

The ratings of a lightning arrester depend on three main factors such as rated voltage, rated frequency, and rated nominal discharge current. Rated Voltage All lightning arresters should withstand the maximum continuous operating voltage (MCOV). …

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Electrical Surges and Overview of Surge Protection Devices

March 3, 2020March 2, 2020

The electrical surge is the transient overvoltage occurring in the electrical power system and network. We recognize it with suddenly rising and slowly decaying voltage. We standardize it with the standard impulse voltage. The standard …

Read moreElectrical Surges and Overview of Surge Protection Devices

AC Circuits RLC Circuits

March 2, 2020February 24, 2020

Purely Resistive Circuit There is no capacitance as well as inductance available in a purely resistive circuit. If a current starts flowing through a purely resistive circuit there will be no back EMF generated in …

Read moreAC Circuits RLC Circuits

AC Fundamentals (Alternating Current)

March 2, 2020February 19, 2020

The current that changes its direction of flow with a certain frequency is called an alternating current. This is the reason, an alternating current circuit does not have any positive or negative terminal. This is …

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Transformer Oil or Insulating Oil and its Characters

January 30, 2020December 5, 2019

There was no oil used in the earlier Transformers. But it was the necessity of using some effective insulating medium in the Transformers. In the year of 1892, the General Electric Company first used insulating …

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Electrical Transformers with Theory of Transformers

February 2, 2020November 20, 2019

Definition of Electrical Transformer The transformer is a static device that transforms electrical energy from one circuit to another without changing its frequency. The transformer works on the principle of mutual induction. Types of Electrical …

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Electrical Busbar Systems

November 25, 2019November 12, 2019

There are numbers of incoming and outgoing feeders and transformers connected together in an electrical substation. But practically it is not possible to connect all the feeders and transformers together at a particular point or …

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Insulation of Transformer

November 10, 2019November 10, 2019

In a transformer, we need to provide the insulation between the core and LV winding and also between the LV winding and HV winding. The insulation comprises of backlight and paper. The insulation system consists …

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Transformer Winding Concentric Winding and Sandwich Winding

November 10, 2019November 10, 2019

There are two forms of transformer windings. One is a rectangular form and another is a circular form. In spite of that, transformer windings can also be either concentric or sandwiches. In a single-phase core …

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Transformer Core Types, Material, and Laminations

November 18, 2019November 8, 2019

Transformer Core Power transformers work depending upon the principle of mutual induction between two or more magnetically coupled windings. The proper mutual induction requires an efficient linkage of magnetic flux between the windings. Therefore there …

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