Capacitive Voltage Transformers (CVT)

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 Capacitive Voltage Transformers (CVT)

AC or DC Power – Which one More Dangerous?

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 AC or DC Power – Which one More Dangerous?

Difference between Earthing, Grounding and Neutral

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 Difference between Earthing, Grounding and Neutral

BDV Test in Transformer

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 BDV Test in Transformer

Difference between Generator, Inverter and UPS

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 Difference between Generator, Inverter and UPS

What is the Need of Synchronizing two Different Power Sources?

For understanding the need of Synchronization of two Power Sources, first we shall consider the meaning of Synchronization. Suppose we have a trolley that can only drawn by either pushing or pulling it ,two workers are there to drive it if one of them is pushing in one direction but the other one is in … Read more What is the Need of Synchronizing two Different Power Sources?

How to Reduce the Ferranti Effect in a Transmission Line?

Ferranti Effect in a transmission Line is reduced using voltage compensation which in turn is accomplished by Shunt Reactor. Shunt Reactor is just like a Transformer but it has only primary and no secondary. Shunt Reactor is connected to all the three phases i.e. R, Y and B phase. Figure below shows a Shunt Reactor. … Read more How to Reduce the Ferranti Effect in a Transmission Line?

Why 400 kV not directly Stepped Down to 33 kV? Why as 400 / 132 kV then132/66 kV finally 66/33 kV?

In electric power Transmission and Distribution, power is transmitted at a voltage level of 400 kV to reduce losses and then at the substation, it is stepped down to 132 kV at which electric power is transmitted and then at substation it is again stepped down to 33 kV. Power is then transmitted at 33 … Read more Why 400 kV not directly Stepped Down to 33 kV? Why as 400 / 132 kV then132/66 kV finally 66/33 kV?