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Recent content by Croges

  1. Croges

    Soil resistivity test equipment and method for high resistivity soils

    hi, I am looking for a test equipment test set up to test in high resistivity soil areas (Western Australian mine sites) and the off the shelf portable meters (AEMC,FLUKE/LEM etc) aren't up to it, their max output is approx 250mA at 32/48V. The Syscal Junior pumps out 1.2A but costs $17k! So I...
  2. Croges

    Earth grid design LV vs HV side of stepup transformers

    Thanks guys ... this is an Australian installation, but I wouldn't mind the reference Scotty re the requirements for HV/LV earths. In practice I have seen common grids used. Because its a step up transformer, with the generator on the LV side, this has thrown me a bit, so thanks for your help...
  3. Croges

    Earth grid design LV vs HV side of stepup transformers

    Hi, I am designing an earth grid for a water treatment plant which uses 2 x LV (415V) 1.5MW generators, then steps up to 11kV using 2 x 1500kVA 415V/11kV transformers (to reticulate rest of plant and for co-gen supply back to the grid), and I am interested in things to "look out for" when...

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