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  1. 1capybara

    Need PF (power factor) meter for 11 KV

    Can someone please recommend a PF meter that will work on 11 KV delta feeders (about 6400 v per phase)? Some of our generators are reading a low power factor (80-85%). But because the generators are switched around to feed different feeders, it would make sense to correct our PF at the feeders...
  2. 1capybara

    Is the motor 240v delta or wye? Or does it matter??

    We have several motors labelled only "240v 60hz 3-phase" These motor are made in USA - an industrial floor standing band saw, band sander, dimpling machine, etc. and name plate doesn't say if thats delta or wye. I assume the motors are actually 240v delta, since thats a standard voltage in USA...
  3. 1capybara

    Time interval for measuring transients in SCADA

    Thank you all! You have me pointed in the right direction. Happy new years 2017 :)
  4. 1capybara

    Power Load Question

    is this single phase or 3 phase?
  5. 1capybara

    Ferroresonance on Switching Secondary Breakers.

    if those secondary cables are causing the resonance their probably inductive and if you can measure their inductance you can add an equal amount of capacitance to neutralize it, or even some small load, exactly like prc said above.
  6. 1capybara

    Time interval for measuring transients in SCADA

    ZapSib, what is COMTRADE? I googled it, nothing seems to relate to electricity ??? Comtradesoftware.com seems like an IT system, or maybe I mis-understand ???
  7. 1capybara

    Time interval for measuring transients in SCADA

    We have a problem with relays tripping at our power plant. We believe it may be due to transients but need to make accurate measurements to be sure. Our current SCADA software (Siemens WinCC) measures 16 points at our power plant, every 500 milliseconds. I asked the SCADA "expert" why we cant...
  8. 1capybara

    ETAP or SKM or other design software?

    My company wants to purchase some EE design software. Does anyone have any experience or recommendation about ETAP or SKM or any other design software? Is ETAP getting to be the most popular? We want something that can connect at our power plant and record and analyze transients there causing...
  9. 1capybara

    Cast resin transformers

    Has anyone tried a cast resin transformer? Like these Link And what is their advantage over previous types of transformers?
  10. 1capybara

    Circuit unbalance code stipulation

    no, not a NEC requirement, but it is best practice to balance loads as much as possible to limit breaker tripping
  11. 1capybara

    How do I insulate high power LEDs from my MCPCB?

    itsmoked is right, ive always seen LEDS mounted directly on the heatink, perhaps you want to look for a different LED than the one you have?
  12. 1capybara

    Lightning Strikes and design theory

    You asked: 1) Where could the source originate at? high speed cameras show many light strikes are upward from the earth to the clouds. 2) I understand the philosophy lightning goes to ground and dissipates, but I argue the point if lighting strikes the ground directly, it does energize that...
  13. 1capybara

    HV, LV and Communication cables in same precast trench

    if the HV has a physical separation sufficient for the use, electric ok. But comms will want to approve, or not, shouldnt matter if its fiber in its own duct, but if comms is copper, ask them if they ok it or not.
  14. 1capybara

    Can a disconnect switch be also used as an ON/OFF control for a fan?

    Not an NEC issue. if its a large fan (over 1 hp or 3 phase) maybe wanna consider soft start or motor controller or contactor.
  15. 1capybara

    Megger BITE3 issues

    What type batteries? What voltage does the megger put out? Can the batteries handle that voltage? PPl maybe concerned about the safety of this.
  16. 1capybara

    Electrical Distribution board design and connection philosophy

    Michael, please correct me if im wrong, but your background is in BS7671 or IEC and you want to design this to NEC, US electric code in a country that requires it like KSA, correct? Ok to answer your questions: 1. TP&N neutral solid to earth incoming is mean my distribution board will only have...
  17. 1capybara

    3 wire v 4 wire range ?

    While 4 wire is required by newer codes, this is a safety issue, and you should use the 4 wire system whether it is required or not. if you've got 4 wires in the wall, use them - for safety sake!
  18. 1capybara

    Client upset About Shearwall design

    my house has shear walls, structural 1 rated sheathing, grade beams, steel columns.....and I'm glad it does. does someone actually want to live in houses not rated for lateral forces?
  19. 1capybara

    Supercritical nuclear power plants

    Duwe6 - according to http://en.wikipedia.org/wiki/LMFBR#Fast_breeder_reactor it says, "As of 2006, all large-scale fast breeder reactor (FBR) power stations have been liquid metal fast breeder reactors (LMFBR) cooled by liquid sodium." so liquid sodium cooling is state of the art - in practice...
  20. 1capybara

    Anyone know what this is??

    im sure this is a grease trap of the type restaurants use.

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