Star-Delta Motor Starting - Performance

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Many questions sent in to the site are in connection with motor starting and in particular star-delta.  For all but the simplest application, there is merit in performing a more detailed study.  Carrying out a software study allows both the electrical performance and that of the connected mechanical systems to be evaluated......Read More..

By Steven McFadyen on Thursday, July 10, 2014

IEC 60287 Current Capacity of Cables - An Introduction

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IEC 60287 "Calculation of the continuous current rating of cables (100% load factor)" is the International Standard which defines the procedures and equations to be used in determining the current carry capacity of cable. The standard is applicable to all alternating current voltages and direct current cables up to 5kV......Read More..

By Steven McFadyen on Thursday, January 31, 2013

Electromagnetic Fields - Exposure Limits

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Exposure to time varying magnetic fields, from power frequencies to the gigahertz range can have harmful consequences.  A lot of research has been conducted into identifying these effects and developing recommended safe exposure limits....Read More..

By Steven McFadyen on Saturday, June 28, 2014

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naban asked the question lightning and grounding

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