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Recent content by 5P10

  1. 5P10

    re-torquing?

    alehman, After reading dandel's comment, I am not so sure anymore whether re-torquing is good or not. But at present, we re-torque our busbars and cables every 2 years. No loosening was done, just re-verifying with a torque wrench. And in the process, we do find a few bolts that we...
  2. 5P10

    Trending of test data

    sngpl, Trending the insulation resistance might not be relevent, as insulation resistance measurement is very much dependent on temperature, weather condition etc. I would think that trending PI for each unit is the only data that would give relevent reference to your customer on how good is...
  3. 5P10

    IEEE Color Book series

    Just to add on your first question. The grounding can be found in the Green Book.
  4. 5P10

    Standard formular for IDMT Relay Curve

    By 3/10, I believe you are talking about the Normal Inverse (NI) curve. Formulas below:- t = (k.B)/((I/Is)^a - 1) where t = operating time (sec) k = TMS (time multiplier settings) I = measured current value (A) Is= set current value a B Normally...
  5. 5P10

    Electrocute Auto Electrical Systems

    I saw in tv once that the cops were experimenting on using high voltage (something like 10-15 kV) to disable cars during chase. Basically the idea is to fry all your fuses (and probably some ECUs as well) to make all electronics fail. Something that can be dangerous because power steering and...

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