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  • Electrical Network schemes

    Posted Mon at 10:46 AM by Hameedullah Ekhlas


      Single radial network This is the simplest, least costly network scheme and the one with least overall reliability. The single radial scheme for a net-work with several voltage levels has a tree structure, possi Read More...

  • Power Fuses

    Posted Aug 17 by Hameedullah Ekhlas


    Power fuses, shown in Figure  in a typical transformer protective application, provide protection that is both reliable and economical. They are inexpensive—both in   The operating procedure for power Read More...

  • Response of a CT in saturated state

    Posted Aug 17 by Hameedullah Ekhlas


      The emergence of static relays leads to revision of protection behaviour as a whole in the case of strong currents: as the CT saturates beyond a certain threshold, the first reaction is often to avoid this by r Read More...

  • Causes of cable failure and need of protection

    Posted Aug 16 by Reynaldo Danilo


      Cables are the mortar that holds the bricks of equipment in an electric system. They are not unlimited in their power capability and hence need to be protected to prevent being exposed to operation beyond their c Read More...

  • Factors Affecting Transmission System Losses

    Posted Aug 15 by Hameedullah Ekhlas


    The following is a description of major factors that can affect transmission losses for a system.   Metering Data   Accurate metering of loads, generation, and transmission interties is critical to reconc Read More...

  • Arc fault circuit interrupter

    Posted Aug 4 by Hameedullah Ekhlas


    Arc fault circuit interrupter technology was originally developed to protect areas near downed utility lines. As circuit boards were miniaturized, arc fault protection was applied to residential circuits. AFCIs are now Read More...

  • All about transformer

    Posted Jul 31 by David Welson


        What should be essential type test requirement for a particular voltage class transformer but of different ratings? Requirement of Dielectric tests whether routine or type are well defined in IS 20 Read More...

  • Time-based discrimination

    Posted Jul 20 by Hameedullah Ekhlas


      Protection functions form a consistent system depending on the overall structure of the power distribution system and the neutral earthing arrangement. They should therefore be viewed as a system based on the p Read More...

  • Medium voltage loop

    Posted Jul 11 by Reynaldo Danilo


      A medium voltage loop is generally supplied from two separate primary substations. It supplies secondary MV/LV substations dedicated to the LV public distribution and private electrical installations. The MV/L Read More...

  • Introduction to Distribution Systems

    Posted Jul 5 by David Welson


        Power systems are comprised of 3 basic electrical subsystems. Generation subsystem Transmission subsystem Distribution subsystem   The subtransmission system is also sometimes designated t Read More...