Inspection of Ground-Fault Protection Systems
This type of protection is defined by the NEC (National Electrical Code) to ensure protection against fire on electrical power installations. To ensure protection against fire: The NEC defines the… Read more
Sep 25, 2012 | Edvard
Testing and Commissioning of Metal-Clad Switchgear
Electrical testing and commissioning of Metal-Clad switchgear is essential to the safe start for the first time, regardless of its size, type or industry. This article covers testing and start-up… Read more
Sep 24, 2012 | Edvard
Surge Protection of Electronic Equipment
Generally, power circuits have components that have large thermal capacities, which make it impossible for them to attain very high temperatures quickly except during very large or long disturbances. This… Read more
Sep 22, 2012 | Edvard
Introduction to Static Protection Relays
The term ‘static’ implies that the relay has no moving parts. This is not strictly the case for a static relay, as the output contacts are still generally attracted armature… Read more
Sep 21, 2012 | Edvard
What is the purpose of equipotential bonding?
Equipotential bonding is essentially an electrical connection maintaining various exposed conductive parts and extraneous conductive parts at substantially the same potential. An earthed equipotential zone is one within which exposed… Read more
Sep 20, 2012 | Edvard
Definition of Harmonics and Their Origin
The Fourier theorem states that all non-sinusoidal periodic functions can be represented as the sum of terms (i.e. a series) made up of: A sinusoidal term at the fundamental frequency,… Read more
Sep 17, 2012 | Edvard
Functions Performed by Electrical Switchgear
National and international standards define the method for making electrical distribution circuits as well as the purpose and functions of switchgear. There are three main functions, namely: Circuit protection takes… Read more
Sep 14, 2012 | Edvard
Nikola Tesla – Everything is the Light
Once, in 1899, Nikola Tesla had an interview with certain journalist John Smith, when Tesla said “Everything is the Light“. In one of its rays is the fate of nations, each… Read more
Sep 12, 2012 | Edvard
Under the Hood of LEDs (Light Emitting Diodes)
LED lamps, or Light Emitting Diodes, are becoming more and more common. Having been used for some time in products such as digital watches, remote controls and brake lights, they… Read more
Sep 08, 2012 | Paul Blythe
Transformer Heat, Copper and Iron Losses
The thermal ratings of a transformer are determined by the following three factors: The amount of heat produced in the windings and connections. The amount of heat produced in the… Read more
Sep 06, 2012 | Edvard
Getting Electricity From Solid Oxide Fuel Cell
Abstract Introduction Fuel Cell Working Principle of SOFC Materials Selection and Processing Cathode Electrolyte Anode Interconnection Types of SOFC Merits and Demerits Applications Stationary energy sources Transportation Military applications SOFC-GT… Read more
Sep 03, 2012 | vinod ramireddy
Motor protection depending on size and voltage level
Motor protections vary widely depending on the size of the motor and voltage level involved, thus only the more common ones are discussed in this technical article. Index Motor Instantaneous… Read more
Aug 30, 2012 | Edvard
Floating Neutral Impacts in Power Distribution
If the Neutral Conductor is opened, broke or lost at either of its source side (Distribution Transformer, Generator or at Load side – Distribution Panel of Consumer), the distribution system’s… Read more
Aug 27, 2012 | jiguparmar
An Overview of Combined Cycle Power Plant
The Combined Cycle Power Plant or combined cycle gas turbine, a gas turbine generator generates electricity and waste heat is used to make steam to generate additional electricity via a… Read more
Aug 25, 2012 | vinod ramireddy
High resistance grounding equipment in mining applications
High resistance grounding equipment or permanently installed electrical distribution systems used in mines should be selected and applied as recommended for process industries. When mobile equipment is connected to the distribution system… Read more
Aug 22, 2012 | Edvard
