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  1. pablo51

    ASME Code Vessel required for Multimedia Water Filter ?

    When I was naive, I cussed and discussed the $1200 toilet seats and the $450 hammers bought by the government... then I had to deal with the nuclear stuff and realized why those charges were there... the paper work and labor involved with the documentation, before - during- and after the...
  2. pablo51

    routine test

    I read this as not that the tests are being questioned, but as to the customer being present during those tests... We always bought our transformers with the writing in the purchase agreement that we reserved the right to observe such tests -- which we never did, and what was explicitly assumed...
  3. pablo51

    Harmonic Control in Consumer System

    I think the only limits for the are those that may have been written into either the corporation commission's edicts or the actual contract with the customer... having said that, the utility has concerns with providing a service that provides good quality to their customers... afterall...
  4. pablo51

    Transformer Class ONS/ONP/OFP

    Make a calculated guess: if there is a different MVA rating for each, then I'd say your on the right track -- if so, the lowest MVA rating should be for the ONS, middle for ONP, and the highest for OFP.. also, check the transformer for having both fans and pumps...
  5. pablo51

    Line reactor for VFD

    I used to design plant systems with 30 to 40 VFD units in each installation -- I used 5% line reactors on all of the VFD's... they typically will be either 3 or 5% if spec'd with the original VFD... they will do 2 things: a) reduce harmonics reflected back onto the system and b) let the VFD...
  6. pablo51

    Calculating the cost of motor starting

    You have remember that your demand charge is set by the highest use over (usually) a 15 minute sliding window -- you add up all of the energy used over that period to set the demand... that charge will then apply for the month or sometimes longer.... starting one motor may not cost much, it does...

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