Restricted Earth Fault Protection

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The windings of many medium and small sized transformers are protected by restricted earth fault (REF) systems. The illustration shows the principal of REF protection....Read More..

By Steven McFadyen on Sunday, March 25, 2012

Cable Insulation Properties

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Cable insulation is used to provide electrical separation between conductors of  a cable.  During the historical development of cables, numerous types of insulation have been employed.  During recent years, there has been some consolidation in the types of insulation used. This post provides some information on the more......Read More..

By Steven McFadyen on Tuesday, May 15, 2012

Photovoltaic (PV) Panel - Performance Modelling

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In an earlier note on the site [Photovoltaic (PV) - Electrical Calculations], the theory of solar (PV) cell calculations was introduced.  In particular the post looked at the PV cell equivalent circuit and the electrical characteristics of the cell.  This note expands on the previous post and shows how we can use tools......Read More..

By Steven McFadyen on Wednesday, January 07, 2015

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