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  • Users: ahmedradi
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  1. ahmedradi

    Relationship between CB break duties and break times in IEC60909

    Hi all, I've got this software package that calculates the fault levels for our transmission network according to IEC60909 Method-C, which is the equivalent frequency method. Such as the make duty is calculated using instantaneous peak with DC component adjusted X/R is calculated at an...
  2. ahmedradi

    3-Winding Transformer Equivalent Model

    Hi everyone, I'm confused about how to model a 3-winding transformer as three 2-winding transformers in star-formation. I was under the impression that it is a simple Delta-to-Star conversion of the impedances, but it is not according to some. I've got an Autotransformer with a delta tertiary...

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