Electric Motor
Why do we find electric motor drive very important?
Electric motors impact almost every aspect of modern living. Refrigerators, vacuum cleaners, air conditioners, fans, computer hard drives, automatic car windows, and multitudes of other appliances and devices all use electric motors to convert electrical energy into useful mechanical energy…. Read more
Feb 29, 2012 | By Edvard Csanyi
Electrical Lectures
Capacitor banks in power system (part 1)
When a charge is delivered to a conductor its potential is raised in proportion to the quantity of charge given to it. At a particular potential a conductor can hold a given amount of charge. Capacitance is the term to… Read more
Feb 27, 2012 | By Asif Eqbal
Electrical Lectures
How to explain your kids, what is the electricity?
It’s really not an easy task to explain kids what is the electricity and what is really happening in the wires while lamp is powered, or what are the magnets, magnetism and how all this stuff works. Most important of… Read more
Feb 26, 2012 | By Edvard Csanyi
Electronics
Under the Hood of Light Detector
Detectors of electromagnetic radiation in the spectral range from ultraviolet to far infrared are called light detectors. From the standpoint of a sensor designer, absorption of photons by a sensing material may result either in a quantum or thermal response…. Read more
Feb 24, 2012 | By Edvard Csanyi
Energy and Power
Zero Emission Power Plant, Without Carbon Dioxide
India is the world’s fourth largest economy and has a fast growing energy market. India’s current power capacity is 30% short of demand. Coal and petroleum are the primary sources of energy. High ash content in Indian coal and inefficient… Read more
Feb 22, 2012 | By vinod ramireddy
Metering
Voltage Instrument Transformer (VT) – Introduction
Instrument transformers are primarily used to provide isolation between the main primary circuit and the secondary control and measuring devices. This isolation is achieved by magnetically coupling the two circuits. In addition to isolation, levels in magnitude are reduced to… Read more
Feb 20, 2012 | By Edvard Csanyi
Renewable Energy
Fossil fuels are almost gone… Solar Energy? Hell Yes!!
Solar energy is not a finite resource as fossil fuels are. While the sun is up there it constantly produces all the energy we can use. While not maintenance free, what technology really is? Once solar panels, wind or water… Read more
Feb 17, 2012 | By Edvard Csanyi
High Voltage
Protection and Relays Used In Main Circuit Board at a Power Grid Substation
The DMH type relay provides high speed biased differential protection for two or three winding transformers. The relay is immune to high inrush current and has a high degree of stability against through faults. It requires a max of two… Read more
Feb 17, 2012 | By Bipul Raman
Energy and Power
220V DC system at thermal power station
The 220V DC system supplies direct current as source of operating power for control, signaling, relays, tripping and closing of switchgears, emergency motors of most important auxiliary systems. Under normal conditions of station generation, the storage battery units are kept… Read more
Feb 15, 2012 | By Bipul Raman
Renewable Energy
Solar energy is free, but what does it really cost?
“Solar energy is free, but it’s not cheap” best sums up the major hurdle for the solar industry. There are no technical obstacles per se to developing solar energy systems, even at the utility megaWatt level (e.g., 14 MW utility… Read more
Feb 13, 2012 | By Edvard Csanyi
High Voltage
Protection Of Generators And Transformers
As Generators and transformers are major components of a power system, so it is quite necessary to take all the preventive measures for the protection of transformers and generators. These are the following ways (ANSI codes) we use to protect… Read more
Feb 11, 2012 | By Bipul Raman
Electrical Lectures
Types of neutral earthing in power distribution (part 2)
Resistance grounding has been used in three-phase industrial applications for many years and it resolves many of the problems associated with solidly grounded and ungrounded systems. Resistance Grounding Systems limits the phase-to-ground fault currents. Continued from Types of neutral earthing… Read more
Feb 09, 2012 | By Jignesh Parmar
Cables
Discussing About LV And HV Electrical Cables
Space is really a critical criterion when discussing electrical cables and wires. In a low-voltage (LV) plastic-sheathed cable with conductor cross-sections of up to 10 mm2 per conductor or in high-voltage (HV) cables (Figure 2), the lion’s share of the… Read more
Feb 08, 2012 | By Edvard Csanyi
Electrical Lectures
Types of neutral earthing in power distribution (part 1)
In the early power systems were mainly Neutral ungrounded due to the fact that the first ground fault did not require the tripping of the system. An unscheduled shutdown on the first ground fault was particularly undesirable for continuous process… Read more
Feb 06, 2012 | By Jignesh Parmar
Maintenance
Purpose and maintenance of transformer bushings
The two most common types of bushings used on transformers as main lead entrances are solid porcelain bushings on smaller transformers and oil-filled condenser bushings on larger transformers. Solid porcelain bushings consist of high-grade porcelain cylinders that conductors pass through…. Read more
Feb 05, 2012 | By Edvard Csanyi
