Skip to main content

DIELECTRIC AND INDUCTANCE

Dielectric:

The word dielectric means nothing but insulator.It means that a dielectric material is something which do not allow the flow of current through it.

Dielectric Strength:

It is defined as the limit of filed strength i.e the property of an insulator that can withstand or oppose the flow of current without breakdown.The breakdown field of an insulator is 10,000 .
That means above this limit of breakdown field the insulator starts conducting the current and behaves as a conducting material.

Inductance:

It is a property of a conductor in which,as the current flowing through it is being changed continuously there will be change in its EMF.The inductance of a material is denoted by letter L and is measured in Henry
These inductance is of two types :

1.Self inductance:

It is the ratio of change of  emf of a circuit to the change of current in the same circuit.

2.Mutual inductance:

It is the ratio of change of emf of a circuit to the change of current in a neighbouring circuit.

Note:Hope you got some clarity i will be back tomorrow with some basic law's of EEE-THANK U

       

Comments

Popular posts from this blog

Application of Artificial Neural Network in Power electronics

 

SWITCHING TRANSIENTS IN TRANSFORMER

Switching Transients: The word Transients is always very Scary for me but not any more hahaaa...........what about you???? Well coming to the point...why do these Switching Transients occur in a Transformer. When the switch is closed when the voltage is maximum...then the flux required by the core is zero and the available flux in the core is also zero and hence NORMAL OPERATION is sufficient When the switch is closed when the voltage is crossing zero...then the flux required by the core is maximum but here the avaliable flux in the core is zero and hence TRANSIENT OPERATION is required Here when the Transient operation takes place then the flux doubles gradually and this is known as Doubling Effect of Transformer.This Doubling Effect causes magnetic in rush current and Damage in the insulation. Using Secondary Harmonic Restraining Coil can reduce all these Drawbacks.

TRANSMISSION LINES

Transmission lines The Transmission lines are basically Electrical Circuits having distributed constants such as Resistance,Inductance and Capacitance.These contants are uniformly distributed along the length of the line and there concentration at any particular point is not possible Basically these Transmission lines are Classified based on two cases, CASE 1: BASED ON LENGTH:- The Tranmission lines are classified into three types here 1.Short Transmission Lines:When the length of the Tranmission line is below 60 km then they are considered to be under STL 2.Medium Transmission Lines:When the length of the Transmission line is 80-160 km then they are said to be MTL. 3.Long Transmission  Lines: When the length of the Transmission line is above 160 km then they are said to be LTL. CASE 2: BASED ON OPERATING VOLTAGE:- Here the Transmission lines are classified into five types 1.Low Voltage:When the operating voltage is upto 1KV. 2.High Voltage:When the operat...