Corona Effect in Transmission Line

Performance of Electric and magnetic Field and Corona Effect in High Voltage Transmission Line

We have already discussed so many articles regarding some of the greater features of high voltage overhead transmission lines. Such as Transportation of Transmission Line, Skin effect of power lines  etc.  Today we are going to discuss another important feature of high voltage transmission lines which are the Corona Effect in High Voltage Transmission Line and the Electric and magnetic Field effect. Corona Effect in High Voltage Transmission Line Voltage up gradation of the existing lines...

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Sag in Transmission Lines

What is the Sag in Transmission Lines and How to Calculate it ( Application of Sag Template)

The Sag in Transmission Lines is applied to the ground profile by moving the same horizontally while always ensuring that the vertical axis or centerline is held vertical.  The sag of high voltage transmission line can simply define as the difference between one level point of and the lowest point of the conductor. The Structure Positions are marked where the tower footing curve cuts the ground profile, while the ground clearance curve is just clear and above the ground profile. The ground...

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Lightning Performance

Lightning Performance of an Overhead Transmission Line

  The Lightning Performance of an overhead transmission line is frequently little changed by upgrading the line voltage. However, upgrading of transmission line should be accompanied by an analysis of the lightning performance of transmission line with respect to shielding failures for lines and or back flashovers. For transmission lines with existing overhead earth wires, it must be ensured that increase in cross arm length or displacement of conductor away from the tower body is followed...

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sag template

What is Sag Template of Electrical Power Transmission Line?

A sag template is specifically design for transmission line according to their voltage levels. According the voltage levels and the conductor used there are specific design conditions are used.Sag Template is a very important feature for the surveyor by the help of which the position of tower can be decided on the Survey Chart so as to conform to the limitations of specified minimum ground clearance required to be maintained as per prevailing national rules, between the line conductor to ground...

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High Voltage Transpostion

What is Transposition of Transmission Line and Features of It

The basic definition for transposition of transmission line is to rotate the conductors which result in the conductor or a phase being moved to next physical location in a regular sequence. In electrical power transmission lines, the conductor arranges unequal space. So the voltage drops are not same as one place to another. To eliminate this effect can simply do by interchange the conductor position which is known as transposition.  When the transmission line is more than 100 km long, then...

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Instrument transformers

Types of Instrument Transformers in Electrical Engineering

Instrument transformers are other type of transformers which is mainly use for measuring purposes.  To Measure high voltages and high currents these kind of instrument transformers are widely used.Ammeters and Voltmeters are use for measure the voltage and currents of Direct Current but in High voltage alternative Current instruments are difficult to measure by using ammeters and voltmeters.  So to solve these problems instrument transformers are use to measure these kinds of large...

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transmission tower height

6 Factors Affects to Determine Transmission Tower Height

The transmission tower height is also important factors to consider while design of transmission lines. There are several factors taken in to consideration while deciding and creating tower height of electrical power lines. Following are those factors which taken in to considerations.Minimum ground clearance Maximum Sag of Conductor Length of Suspension Insulators Vertical space between conductors Ground Wire Location Angle of ShieldFollowing are some comprehensive details of the mentioned...

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