Types Of Loads
A device which taps electrical energy from the electric power system is called a load on the system. The load may be resistive (e.g., electric lamp), inductive (e.g., induction motor),…
Vectors Basics
[vc_row][vc_column width="2/3"][vc_column_text]Vector analysis is a mathematical subject which is much better taught by mathematicians than by engineers. Vector analysis is mathematical shorthand. It has some new symbols, some new rules,…
Vector Coordinate System
[vc_row][vc_column width="2/3"][vc_column_text]In order to describe a vector accurately, some specific lengths, directions, angles, projections, or components must be given. There are three simple methods of doing this, and about eight…
Magnetic Circuits
[vc_row][vc_column width="2/3"][vc_column_text] Introduction Magnetic Circuits offer, as do electric circuits, a way of simplifying the analysis of magnetic field systems which can be represented as having a collection of discrete…
Importance Of Protective Relaying
[vc_row][vc_column width="2/3"][vc_column_text] The objective of power system protection is to isolate a faulty section of electrical power system from rest of the live system so that the rest portion can function satisfactorily without…
Electricity Bill Calculation
[vc_row][vc_column width="2/3"][vc_column_text] What are Power and Energy? Power and Energy/Electricity are two words that are used so much for each other that many feel that they mean the same. Interestingly…
Hopkinson’s Test
[vc_row][vc_column width="2/3"][vc_column_text] Hopkinson’s Test is also known as Regenerative Test, Back to Back test and Heat Run Test. This as an elegant method of testing DC machines. Here it will…
Harmonics
[vc_row][vc_column width="2/3"][vc_column_text]Harmonics are a distortion of the normal electrical current waveform, generally transmitted by nonlinear loads. Switch-mode power supplies (SMPS), variable speed motors and drives, photocopiers, personal computers, laser printers,…
Swinburne’s Test
For a d.c shunt motor, change of speed from no load to full load is quite small. Therefore, mechanical loss can be assumed to remain same from no load to…
Batteries
Household batteries “Household batteries” are the small portable batteries used daily by most people in devices such as radios, toys, flashlights and lanterns, games, watches, calculators, cameras, telephones and other…