Motor Efficiency Classification

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Electric motors are one of the most widely used items of electrical equipment. Improving motor efficiency benefits include, reduced power demand, lower operating costs and reduced environment impact. In recognising the impact of motors on both power generation requirements and environmental issues, regulation in many......Read More..

By Steven McFadyen on Wednesday, March 28, 2012

Maximum Demand for Buildings

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Estimating maximum demand is a topic frequently discussed. Working out how much power to allow for a building can be very subjective . Allowing too much power results in additional equipment, increased space requirements, greater system losses and extra cost. On the other side, no enough power results in operational problems......Read More..

By Steven McFadyen on Wednesday, June 16, 2010

Cable Sheath and Armour Loss

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When sizing cables, the heat generated  by losses within any sheath or armour need to be evaluated. When significant, it becomes a factor to be considered in the sizing of cables. This note looks at how to obtain the necessary loss factors for use within the IEC 60287 calculation.  In addition, the loss factors quantify......Read More..

By Steven McFadyen on Sunday, October 13, 2013

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