Generator Sizing & Operation Limits


When selecting a generator, there are inherent limits on the active and reactive power which can be delivered. Generators are normally sized for a certain kW at a power factor of 0.8. However, to understand the operation fully, it is necessary to look at the generator reactive power curve....Read More..

By Steven McFadyen on Monday, November 01, 2010

Star-Delta Motor Starting - Performance


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


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

Community Activity

Sathya Narayana JE E/M answered the question Cable sizing

1 week ago

Steven McFadyenNotes discussion - please restrict comments to asking for clarifications on the note or adding value to the topic. If you are looking for help with a general question, please use our questions section.
Don't forget to search the site first; the answers may already be available.

2 weeks ago

    naban asked the question lightning and grounding

    1 month ago

    ram31 voted for Power Swing

    This answer is useful

    2 months ago

    myElectrical Tools

    myElectrical Tools

    We have tools to help.  Our tools range from assisting with basic calculations to IET compliant cable sizing. Feel free to browse and try. 

    Units Conversion
    Complex Number Calculator
    3-Phase Calculations
    IEE Cable Sizing
    Circuit Protective Conductor
    Power Factor Correction

    even more tools...




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