The construction of a gapless zinc oxide lightning arrester is quite simple. The zinc oxide lightning arrester comes in the family of metal oxide lightning arresters. A specific number of zinc oxide cylindrical discs stacked …
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). …
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 …
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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 …
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 …
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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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 …
Read moreElectrical Transformers with Theory of Transformers
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 …
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 …
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 …
Read moreTransformer Winding Concentric Winding and Sandwich Winding