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Recent content by capuchi

  1. capuchi

    G.E. Industrial Power Systems Data Book

    hi henryOHM, i would like to add my name to the list of people chasing Donald Beeman's masterpiece. You will surely make a lot of people happy if you can share with us your book in pdf format. just what scottyuk and jon47532 said it may be a public domain now. besides its a GE publication...
  2. capuchi

    Bucholtz Trip

    Wow, you are having a Buchholtz tripping with that size of transformer. Act now, bring the experts in who have the capability and right test equipment to analyze the gas which a Buchholtz relay is essentially intended for. They may also do transformer turns ratio (TTR) test and oil dielectric...
  3. capuchi

    Paralleling a single neutral conductor with a 3/C tray cable

    dpc, your advise quite interest me. you mentioned that two neutral wire can be paralleled provided that they are as close to each other and must be in the same conduit. my query is . . . what would be the adverse effect if one in inside ferrous conduit while the other is inside non-metallic...
  4. capuchi

    CT ratios

    david beach, if i may ask, what would the standard V/T be for a 3000:5? sorry i dont have IEEE book nor mfr's data. would appreciate your advise. capuchi
  5. capuchi

    Sample ac voltmeter and ammeter wiring diagram

    that's right there are 2 CT's and 2 PT's since the kwhr meter is a 2-stator type. for long term the digital power meter is the best option. thanks for the suggestions. capuchi
  6. capuchi

    Sample ac voltmeter and ammeter wiring diagram

    I don't have the meters yet. I'm still undecided if I will go for digital or just analog for the meantime due to economic considerations. Big difference in price between analog and digital meters. I know it will a lot easier if I go for digital coz no need for voltmeter and ammeter switches. Am...
  7. capuchi

    Sample ac voltmeter and ammeter wiring diagram

    Thanks racobb. I'm just concerned about the polarity of the CT's reason I want to see a "standard" metering wiring diagram. capuchi
  8. capuchi

    Sample ac voltmeter and ammeter wiring diagram

    hi to everybody, I plan to install ac voltmeter and ammeter on a 3 phase, 3-wire main dist. panel using transformer rated current voltmeter and ammeter to monitor current (amps) demand on the system. Can anybody please direct me to a URL or links that has sample wiring diagrams showing the...
  9. capuchi

    di-electric mat in front of the high voltage switchboard

    You wont find any applicable standard. It's a matter of choice. I once found them in a military base power plant but it was there as an anti-slip mat because the floor was smooth and slippery. capuchi
  10. capuchi

    Relay setting

    To 22574, I agree with rbulsara. You can get a free copy of the publication "The Art of Protective Relaying" from GE Industrial webpage. capuchi
  11. capuchi

    Cap Bank contactors melted

    Thanks for your advise guys. I really appreciate it. Will consider your recommendations. capuchi
  12. capuchi

    Cap Bank contactors melted

    Hi to all! We have a 500 KVAR Auto Correcting Capacitor consisting of 2 x 50 KVAR and 10 x 40 KVAR, 460 V, 3 phase, 60HZ. Five (5) of 12 switching contactors had contacts melted (some 2 poles melted, others 1 pole). Continuous current rating of the contactors is 80 amps at 460 V. The Cap Bank...
  13. capuchi

    Shot blast in transformer; IR good so ok to energize?

    the electric man i can not agree more with wbd. i just can't understand why the manufacturer would go ahead in energizing the unit knowing fully well of the situation. this would be a warranty liability issue in the future. are you ready to take the risk? capuchi
  14. capuchi

    Protection Relay or Protective Relay or something else?

    to oldfieldguy, i haven't had a good laugh for the last couple of weeks. looks like i'm a nut laughing alone. it's the best medicine! What's in a name? others would like to glamorize their calling. To me it does not matter.
  15. capuchi

    Dry type transformer abnormal heating

    to dpc and dandel thanks for your response. just for general guidance, how much load unbalance can a transformer take or is tolerable without causing damage to the unit itself. again your help will be appreciated. capuchi

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