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  • Users: backer86
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  1. backer86

    three winding autotransformer impedence

    I am trying to evaluate the impedence of an autotransformer with a tertiary winding. The problem is that I am getting negative value for primary winding impedence, how is that possible? Zhx = 10% on 30MVA Zxy = 9% on 10MVA Zhy = 15% on 30MVA I am using 100MVA as base. H: high voltage winding...
  2. backer86

    Reactor Rating

    I am trying to find the rating of a reactor connected to a medium voltage system for fault current calculations. the reactor has specs as follows: Reactor connected to a 4.16KV bus 300A Z = 6%
  3. backer86

    Power Cable Impedance

    I am trying to find the impedance of power cables for fault current calculation purposes. I am trying to solve a question just like the one in chapter 4 of IEEE red book. I am using the tables provided at the end of the chapter but I don't know whether to use tables A4-3 and A4-6 or to use table...

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