Tricky but Easy Electrical Engineering!
In Electrical Engineering, every time our aim is to get the perfect Sinusoidal voltage or current without having any harmonics. But the question arises why do we select Sinusoidal waveform why not other waveform for voltage and current? The following reasons favor the use of sinusoidal wave: For Sinusoidal wave, hysteresis and eddy current losses … Read more
Transposition of Conductors refers to the exchanging of position of conductors of a three phase system along the transmission distance in such a manner that each conductor occupies the original position of every other conductor over an equal distance as shown in figure below. Advantages of Transposing Transmission Line: When conductors are not transposed at … Read more
The concept of system grounding is extremely important, as it affects the susceptibility of the system to voltage transients, determines the types of loads the system can accommodate, and helps to determine the system protection requirements. The system grounding arrangement is determined by the grounding of the power source. For commercial and industrial systems, the … Read more
Load curve is the variation of load with time on a Power Station. As the load on a Power Station never remain constant rather it varies time to time, these variations in load is plotted on half hourly or hourly basis for the whole day. The curve thus obtained is known as Daily Load Curve. … Read more
Power System nowadays is one of the most complex system. There are a number of generating stations that generate power equal to load at that particular time. However, if need arises, the system can generate more power. This ability of power system to generate power over and above the current demand is expressed as reserve … Read more
The basic principle for Breaker operation is to extinguish arc which form when the Breaker is opened. But it does not mean that arcing donot take place when the breaker is closed, rather it does. The time duration for which arcing take place when Breaker is closed is known as Pre-arcing Time which is typically … Read more
HRC stands for High Rupturing Capacity. HRC Fuse has high rupturing capacity. Because of its high current rupturing capacity, a special method for extinguishing arc is required in the design of HRC Fuse. Construction of HRC Fuse: HRC Fuse consists of heat resisting ceramic body having metal end caps on which silver current carrying element … Read more
As we know that Lightning is an electric discharge in the form of a spark or flash originating in a charged cloud. Lightning is a very long electrical spark, ‘very long meaning greater than about 1 kilometer. Most lightning is generated in thunderstorms and is characterized by a length of 5 to 10 km, at … Read more
It seems amazing that Insulation Resistance (IR) of a Cable is inversely proportional to the length of Cable. As per our general perception, the resistance is directly proportional to length of conductor but mind here that it is not the resistance of conductor rather it is the resistance of the Insulation provided around the conductor. … Read more
Fuse: A fuse is the small piece of wire connected between the two terminals of insulated mounted base. Fuse is always connected in the series of the circuit of low voltage equipment. It is the simplest and cheapest form of protection from overload and short circuit. The Fuse is expected to carry the normal current … Read more