Lightning And Surge Protection For Cable Networks And Antennas For TV (Part 1)

IEC 60728-11 complies with the state of the art and offers easy, standardized and effective protective mechanisms against the effects of lightning strikes into antennas. Antennas installed according to this… Read more

Sep 09, 2013 | Energy and Power

Selection Of Number Of Cable Cores With Emphasis On Sizing Parameters

The selection of number of cable cores basically depends on the type of system where it is going to be installed. Generally we have two types of systems: A perfectly… Read more

Sep 06, 2013 | Cables

Determining the soil resistivity to design a good substation grounding system

It is essential to determine the soil resistivity and maximum grid currents to design a substation grounding system. The touch and step voltages are directly proportional to these values. Overly… Read more

Sep 04, 2013 | Energy and Power

Electrical Thumb Rules You MUST Follow (3)

Continued from second part: Electrical Thumb Rules You MUST Follow (Part 2) For Motor Size of Capacitor = 1/3 Hp of Motor ( 0.12x KW of Motor) For Transformer <… Read more

Sep 02, 2013 | Electrical Lectures

Goals and Benefits of the IEC 61131 Standard (PLCs – Programmable Logic Controllers)

The five parts of the standard IEC 61131 summarise the requirements of modern PLC systems. These requirements concern the PLC hardware and the programming system. The standard includes both the… Read more

Aug 30, 2013 | Industrial Automation

Electrical Thumb Rules You MUST Follow (2)

Continued from first part: Electrical Thumb Rules You MUST Follow (Part 1) For Sinusoidal Current: Form Factor = RMS Value/Average Value = 1.11 For Sinusoidal Current: Peak Factor = Max… Read more

Aug 28, 2013 | Electrical Lectures

Identifying The Primary And Secondary Phasor Polarities Of Transformer – Polarity Test

This is needed for identifying the primary and secondary phasor polarities. It is a must for poly phase connections. Both a.c. and d.c methods can be used for detecting the… Read more

Aug 26, 2013 | Testing and Commissioning

Hey Tesla, get married, be happy and sleep o’nights! – AMERICAN ELECTRICIAN, July 1, 1896

This articles appeared at  AMERICAN ELECTRICIAN on July 1, 1896 by journalist Edward J. Wessels. Our sprightly contemporary, the Electrical Journal, takes issue with Mr. Nikola Tesla as to the undesirability of marriage… Read more

Aug 24, 2013 | Energy and Power

Electrical Thumb Rules You MUST Follow (1)

Cable Capacity Current Capacity of Equipment Earthing Resistance Minimum Bending Radius Insulation Resistance Lighting Arrestor Transformer Diesel Generator Current Transformer Quick Electrical Calculation For Cu Wire Current Capacity (Up to… Read more

Aug 23, 2013 | Electrical Lectures

Drive Design in Electric Vehicles

Good Evening all, in this session I’m going to present some of the issues in drive design in the field of Electric Vehicle. I’ve organized the whole series into modules… Read more

Aug 21, 2013 | Electric Motor

Total Losses in Power Distribution and Transmission Lines

Power generated in power stations pass through large and complex networks like transformers, overhead lines, cables and other equipment and reaches at the end users. It is fact that the… Read more

Aug 19, 2013 | Transmission and Distribution

Tesla’s Big Tower To Be Sold For Debt, BROOKLYN DAILY TIMES, June 12, 1907

This article was originally posted in The Brooklyn Daily Times on June 12, 1907. The tower of Wonders at Wardercliffe, where Nikola Tesla, the inventor, preserved SUCH MYSTERY and where it… Read more

Aug 17, 2013 | Energy and Power

National Fire Alarm Code Defined By NFPA 72

NFPA 72 is the National Fire Alarm Code. The importance of installing smoke and fire alarms in homes is supported by results from exhaustive investigations of home fires indicating that… Read more

Aug 16, 2013 | Energy and Power

An Overview of IEC 60076-10 – Determination Of Sound Levels Of Power Transformers

The audible sound radiated by transformers is generated by a combination of magnetostrictive deformation of the core and electromagnetic forces in the windings, tank walls and magnetic shields. Historically, the… Read more

Aug 14, 2013 | IEC Standards

Jet pumps used for private well systems or low flow irrigation applications

Jet Pumps are mounted above ground and lift the water out of the ground through a suction pipe. Jets are popular in areas with high water tables and warmer climates…. Read more

Aug 12, 2013 | HVAC