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Latest articles

Electromagnetic Radiation Norms in DoT

Published on April 17, 2016

Limits for electromagnetic radiation are prescribed by ICNIRP...

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Solar Photovoltaic System Capacity Calculation

Published on July 5, 2015

Once load requirement of solar power is known, SPV and battery capacity can be calculated by following formulas...

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Green Telecom

Published on July 14, 2013

Green Telecom Networks are networks that use energy efficient technology, renewable energy, and eco-friendly consumables. Green Manufacturing is processes using eco-friendly components, energy efficient equipment, electronic and mechanical waste recycling and disposal, reduction in use of hazardous substances like chromium, lead, and mercury and reduction of harmful radio emission...

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Generating Set Capacity Selection

Published on March 4, 2012

For the purpose of calculating the capacity of generating set in telephone exchange buildings, following norms are made by the department. For arriving at the capacity, it will be necessary to calculate the various loads and work out the initial and ultimate peak loads after applying the demand factor over the connected load for each and every type of load. Various loads which are to be provided by generating set in telephone exchanges are mentioned in the following table...

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Planning and Design of Substation

Published on February 19, 2012

All devices in sophisticated electronic devices / computers carry a name plate rating, but it should be remembered that their load is non-linear and also there is the problem of high inrush currents and surges. So we have to select high crest factor tolerance, and it is still more important for SMPS Loads. So a judicious load estimation is required...

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Method of Testing Fire Detection and Alarm System

Published on February 12, 2012

This engineering instruction describes the method of testing the fire detection and alarm system of Telephone Exchanges in general and E-10B Exchange in particular...

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