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  • Users: Danyboymx
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  1. Danyboymx

    Does anyboydy knows how to ratio a delta/zig-zag transformer?

    I have 3 phase 480/208-120 delta/zig-zag transformer that gave me bad ratio when tested with a Vanguard TTR test set. Any ideas how to ratio this transformer using a voltage source on the primary and a voltmeter on the secondary?
  2. Danyboymx

    Transformers Paralleling

    I have two identical 3 phase dry type transformers I am trying to parallel: 1.5 MVA 15kv/480v Z=7.2% Dy11 They are being fed from the same source. I measured voltage across A-A B-B and C-C before closing the tie breaker and they measured 47 V. Voltages between phases are all the same, 480v. Is...
  3. Danyboymx

    Protective Ground Sets

    When testing protective ground sets, what is the maximum allowable voltage drop?
  4. Danyboymx

    Protecting Ground sets

    When testing protective ground sets, what is the maximum allowable voltage drop for a specific grounding set rating?

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