Capacitive Voltage Transformers (CVT)

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The application for capacitor voltage transformers, CVTs, is the same as for Inductive Voltage Transformers. The main function of a Capacitive Voltage Transformer is as follows: To transform currents or voltages from a usually high value to a value easy to handle for relays and instruments. To insulate the metering circuit from the primary high … Read more

AC or DC Power – Which one More Dangerous?

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Alternating Current (AC) and Direct Current (DC) have slightly different effects on the human body, but both are dangerous above a certain voltage. The effect on a particular person is very difficult to predict as it depends upon a large number of factors like amount of current, duration of flow, pathway of current, voltage applied … Read more

Basics of Stepper Motor

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A Stepper Motor is a special form of AC Motor. The input of this motor is in the form of electric pulse. For each input pulse,motor shaft turns through a specified degree, called Step. The Step size may vary from 0.72° to 90°. This means that motor shaft may turn from 0.72° to 90° for … Read more

Difference between Earthing, Grounding and Neutral

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Earthing means connecting the dead part, it means the part which does not carries current under normal condition to the earth. For example electrical equipment’s frames, enclosures, supports etc. While Grounding means connecting the live part (it means the part which carries current under normal condition) to the earth. For example neutral of power transformer. … Read more

BDV Test in Transformer

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BDV test means Breakdown Voltage Test. It is done for checking the dielectric strength of the oil of the Transformer. Dielectric strength means the maximum capacity to withstand voltage of insulating oil. This test shows the dielectric strength of Transformer oil. In transformer oil has mainly two purposes, first for insulation, second as cooling of … Read more

Differences between a Phasor and a Vector

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If someone ask you whether current and voltage are vector or scalar quantity the obviously you will answer that they are scalar quantity. Next, the question arises if current and voltage are scalar quantity then why do we represent then in form of vector which is famously known as Phasor? We will discuss here this … Read more

Difference between Generator, Inverter and UPS

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Generator: A generator is a machine that converts mechanical energy into electricity. A generator generally requires fuels like kerosene, petrol, diesel, etc. Fuel is used as the source of mechanical energy. A generator is used mostly when a lot of power is required. Generally small devices do not require generator. When we  want to use … Read more