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MACHINE

TAP CHANGER AND BUSHING OF TRANSFORMER

TAP CHANGER: A transformer’s rated voltage may not match the system voltage exactly, or it may necessary to raise or lower the output voltage to...
MACHINE
MACHINE
MACHINE
MACHINE

MAGNETIC PATH AND CORE MATERIAL

MAGNETIC CORE OF TRANSFORMER: The purpose of magnetic core is to provide a low reluctance path for the magnetic flux linking primary and secondary winding....
MACHINE

INTRODUCTION OF TRANSFORMER

A transformer is a static device which transfers electric power from one circuit to another by electromagnetic induction without changing the frequency in an a.c...
POWER SYSTEM
POWER SYSTEM

SHORT CIRCUIT FAULT

SHORT CIRCUIT FAULT: In power system, if the current flowing path is shorted by touching the earth or touching another conductor which causes huge current...
POWER SYSTEM
POWER SYSTEM

CORONA, FACTORS AFFECTING CORONA

Corona In overhead transmission line, when an alternating potential difference is applied across two parallel conductors, potential gradient is set up in the air. This...
POWER SYSTEM

FAILURE AND TESTING OF INSULATOR

Failure of insulator Main causes of an insulator failure are abnormal stress, ageing, cracks, flash over etc. Flow of leakage current through the insulator, also...
POWER SYSTEM

STRING EFFICIENCY

Potential distribution over a string of suspension insulators: In suspension insulator, it consists of connecting number of porcelain discs in series. So, due to the...
POWER SYSTEM

TYPES OF INSULATOR

Types of insulator: Different types of insulators are Pin insulator: This type of insulator normally used in low voltage line. It is made by porcelain...
POWER SYSTEM

INSULATOR

Insulators As we have already known that, every pole or tower is earthed, we also need some insulation between the live conductor and earth. Insulators...
POWER SYSTEM

CAPACITOR BANK.

Capacitor bank : When a single unit of capacitor is not sufficient for high voltage rating as well as kilo or mega VAR rating, a...
POWER SYSTEM

POWER FACTOR IMPROVEMENT

Power factor improvement Low power factor means current lags far behind of voltage. Due to inductive load, circuit takes lagging current. So, if we want...
POWER SYSTEM

BASICS OF POWER FACTOR

POWER FACTOR : We have already seen that electric power generated, transmitted and distributed in the form of alternating current is generated. what is power...
BASIC FUNDA
BASIC FUNDA

CAPACITOR AND CAPACITANCE

Capacitor: The capacitor is a passive device, which can store electric charge into its conducting surface (plates) when connected with a voltage source and discharge...
BASIC FUNDA

SUPPORTS – POLE AND TOWER.

SUPPORTS: Supports for overhead lines are mainly of two types (a) Pole and (b) Tower. Up to 33 kv in distribution system poles are used....
POWER SYSTEM

CONDUCTOR MATERIAL.

In case of mechanical design of over head line, main components of overhead lines are (i) conductors, (ii) supports, (iii) insulators. Beside these (a) bracket...
POWER SYSTEM

ECONOMIC CHOICE OF TRANSMISSION VOLTAGE

Economic choice of transmission voltage: Higher transmission voltage causes reducing the conductor size. Rising voltage n times mean reducing the conductor size to 1/n2 that...
POWER SYSTEM
POWER SYSTEM
POWER SYSTEM

INTRODUCTION

POWER TRANSMISSION: Transmission means transmitting process of something from one place to another. Similarly electrical power transmission is nothing but the process of electrical power...
BASIC FUNDA
BASIC FUNDA
BASIC FUNDA

ELECTROMAGNETIC INDUCTION.

ELECTROMAGNETIC INDUCTION: As per previous study, we know that when electric current flows through a conductor, it creates a magnetic field surrounding it. The reverse...
BASIC FUNDA

BIOT- SAVART , MAXWELL LAW

BIOT- SAVART LAW: Baptisle Biot and Felix Savart, in the year 1820 states a law which determines the magnetic field strength surrounding of a current...
BASIC FUNDA

MAGNETISATION CURVE, CIRCUITAL LAW

MAGNETISATION CURVE:- For a Ferromagnetic material, Magnetization curve is the graphical representation of flux density (B) and magnetizing force (H) or magnetic field strength. This...
BASIC FUNDA

LEAKAGE FLUX

LEAKAGE FLUX: Leakage flux is that flux which does not follow the specified path for it, that means it follows the path which is not...