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  • Disconnectors (Isolators)

    Posted December 24, 2019 by Hameedullah Ekhlas

    113 Views

      A disconnector is a device consisting of moving contacts that are mechanically closed to close the electrical circuit to other devices or mechanically open so that it can detach part of the adjacent grid t Read More...

  • Tappings and Tapchangers of a Transformer

    Posted December 24, 2019 by Reynaldo Danilo

    1 Like 1,136 Views

    Almost all transformers incorporate some means of adjusting their voltage ratio by means of the addition or removal of tapping turns. This adjustment may be made on-load, as is the case for many large transformers, by Read More...

  • Pump Motor Starting

    Posted December 24, 2019 by Hameedullah Ekhlas

    130 Views

    Various methods are utilized to accelerate the generator/motor in the pump direction during starting (IEEE, 1010). These include the following: Full voltage, across the line starting—Used primarily on smaller Read More...

  • Rule of Parallel Circuits

    Posted December 23, 2019 by Hameedullah Ekhlas

    105 Views

      In a parallel circuit, there are as many independent currents as there are branches, in the same way that in a series circuit, there are as many independent voltages as the number of components. Independent is us Read More...

  • Battery Types

    Posted December 22, 2019 by David Welson

    146 Views

      Battery Types     Chemical batteries are individual cells filled with a conducting medium-electrolyte that, when connected together, form a battery. Multiple batteries connected together form a bat Read More...

  • Electrical Safety at Work and Safety Rules

    Posted December 22, 2019 by Hameedullah Ekhlas

    156 Views

      We work for our living. Therefore work must not endanger our lives nor must it harm the workers, but accidents always happen. As a professional individual when working with electricity, we must avoid any unsafe Read More...

  • Laws of Thermodynamics

    Posted December 21, 2019 by David Welson

    134 Views

    Laws of Thermodynamics Before we further discuss thermodynamic cycles it is essential to cover the fundamental laws of thermodynamics on which science of thermodynamics is based. While studying the laws of thermodynam Read More...

  • Earthing Mat Design For Substation

    Posted December 21, 2019 by David Welson

    1 Like 264 Views

    Download Excel sheet Introduction   Earthing practices adopted at Generating Stations, Substations, Distribution structures and lines are of great importance. It is however observed that this item is most often Read More...

  • protection schemes during power swings

    Posted December 20, 2019 by Reynaldo Danilo

    134 Views

      Automatic protection schemes during power swings All types of faults or short circuits, low impendence or high impedance, single phase - ground or multiple phases, temporary or permanent must trip the CBs Read More...

  • DOL and Star-Delta Starter Excel Calculator

    Posted December 14, 2019 by Reynaldo Danilo

    779 Views

      Using this excel sheet you will be able to calculate the motor   motor torque, fuse, CB, OL relay and contactor Download