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  1. drbou

    Parallel cables routed in tray-200 amp ground currents

    PowerfulStuff, The IEC and VDE standards that I have seen so far do not mention any values. In the building I refered to there are nine transformers 30kV/0.725V delta-wye (Dy5) 3.125 MVA dry type transformers. Also in same building there is also one 30kV/400V, 3.125 MVA delta-wye...
  2. drbou

    Parallel cables routed in tray-200 amp ground currents

    We have just comissioned a new installation in Germany and we are measuring currents on all are grounding conductors although not as high as those mentioned. For example our fiberline building has six 30kV,725V transformers each feeding an MCC. All distribution is with trefoil cables. Currents...

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