Smart Grid - The Most Trending in 2015

Introduction Smart Grid generally refers to a class of technology being used to bring utility electricity delivery systems into the 21st century, using computer-based remote control and automation. Much in the way that a “smart” phone these days means a phone with a computer in it, smart grid means “computerizing” the electric utility grid. They offer many benefits to utilities and consumers - mostly seen in big improvements in energy efficiency...

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Earthing - Basics

Earthing is a connection which connects parts of the electric circuit with the ground or earth. Regulations for earthing system vary considerably among countries and among different parts of electric systems. Most low voltage systems connect one supply conductor to the earth (ground). Normally, the earth connection should be without the intervention of a fuse, switch, circuit breaker, resistor etc. Need for earthing: Stable...

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Comparison between Magnetic and Electrical Circuits

When we compare the Magnetic and Electrical circuits, M.M.F is analogous to E.M.F., flux to current and reluctance to resistance. In electric circuit as per Ohm’s Law:                              I = V / R Similarly in magnetic circuit when Ohm’s Law is applied:                            Magnetic...

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Types of DC Generator and Their Characteristics

Types of DC Motor D.C. generators are classified according to the method of their field excitation. These groupings are: Permanent magnet dc generators, where a permanent magnet is used to establish flux in the magnetic circuit. Separately-excited generators, where the field winding is connected to a source of supply other than the armature of its own machine. Self-excited generators, where the field winding receives its supply from...

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Types of Electrical Drawings

Electrical drawings generally fall into four broad categories: Plans Schedules Diagrams Details and/or Elevations We will examine each or these categories briefly and determine their place in the overall picture or project . Electrical Plans and Plan Views The electrical floor plan tells the electrician where each electrical device and piece of equipment is to be located related to the architectural features of the area. It shows the electrician...

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Resistance - Series and Parallel Connection

Series and parallel Connections When several devices are connected end to end in such a way that there is only one path for the current to flow and so, the same current flows through each, then such a circuit is called a "series circuit". When several devices are connected to a common voltage in a certain manner that they provide alternative paths for the current.  Where the current in each path (device) will depend on its resistance. ...

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Energy and Power in an Electric Circuit

Energy is the ability to do work. Power is the rate at which energy is used. Power, symbolized by P, is a certain amount of energy used in a certain length of time, expressed as follows:  Power =                      Energy is measured in joules (J), time is measured in seconds (s), and power is measured in watts (W).   Energy...

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DC Generator Operating Principle - e.m.f. Equation

The basic principle of a DC machine is Faraday's laws of electromagnetic induction. According to these law, when an conductor moves in a magnetic field it cuts magnetic lines force, due to which an emf is induced in the conductor. The magnitude of this induced emf depends upon the rate of change of flux (magnetic line force) linkage with the conductor.When the armature rotates, the armature conductors cut the flux produced by the field...

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