Electrickery question?

Discussion in 'General' started by PistolPete, Nov 13, 2019.

  1. pickled egg

    pickled egg Who lives in an air bubble under the sea?

    Let’s really fuck with him and explain why a wye 3-phase has 120v per phase with 208v between phases. :D
     
    JBraun and mastermind like this.
  2. GRH

    GRH Well-Known Member

    They have VFDs in them?
     
  3. Gino230

    Gino230 Well-Known Member

    So the two 120 legs being out of phase makes it 240 volts, whereas if it was in phase it would only be 120 with twice the amperage?
     
    JBraun likes this.
  4. mastermind

    mastermind Well-Known Member

    Yea..... plus you have a fresh water tank that could supply a small country for a week :D (at least if it's the same size as Richard's and you guys have sorta the same type of rig).....

    t
     
  5. mastermind

    mastermind Well-Known Member

    Correct. So load to neutral for either leg is 120v, but load to load (when 180 deg out of phase) is 240v. If the loads aren't 180deg out of phase you won't get that.

    t
     
    JBraun and Gino230 like this.
  6. Gino230

    Gino230 Well-Known Member

    Is that why they call it parallel operation when they are in phase?
     
  7. JBraun

    JBraun Well-Known Member

    Because Ninja magic.
     
  8. JBraun

    JBraun Well-Known Member

    No, VFD stuff is quite forgiving since it actually alters the frequency. PWM is kind of like switching the motor on and off really fast to control speed. How fast is calculated based on a clean 180 degree sine wave. If the legs are slightly out of phase the microprocessor gets angry.
     
  9. Mongo

    Mongo Administrator

    It's a pair of 50 gallon tanks :D
     
  10. Mongo

    Mongo Administrator

    Maybe it's a pair of 100 gallons? Yeah, has to be, they're bigger than the fuel tanks and those are 70 each.
     
    mastermind likes this.
  11. mastermind

    mastermind Well-Known Member

    My sissy-pansy class A only holds 100 gallons....

    :(
     
  12. Venom51

    Venom51 John Deere Equipment Expert

    You can also try to explain how a rotary phase convertor makes 3 phase power out 220v single phase. I've done enough reading to make my head hurt but there is a 15hp RPC sitting in the garage waiting on the electricians to get here.
     
  13. GRH

    GRH Well-Known Member

    The new machine show up?
     
  14. Venom51

    Venom51 John Deere Equipment Expert

    Hopefully going on a truck on before the weekend gets here. It may cost me a high performance beetle however. If my measurements turn out to be wrong the beetle may no longer fit in the garage. It'll have to go to a new home.
     
  15. pickled egg

    pickled egg Who lives in an air bubble under the sea?

    I ain’t seen no plane ticket show up yet... ;)

    [​IMG]
     
  16. Venom51

    Venom51 John Deere Equipment Expert

    Well...shit. I didn't really think about that. I guess I could have got it done that way. Not that coming to Georgia to climb around in my attic pulling cable is high on your priority list I'm sure. :D
     
  17. pickled egg

    pickled egg Who lives in an air bubble under the sea?

    Eh. A change of scenery wouldn’t suck. ;)
     
  18. auminer

    auminer Renaissance Redneck

    Missed 'connections'? :Poke::Poke:


    :D
     
  19. pickled egg

    pickled egg Who lives in an air bubble under the sea?

    Not if you put the proper torque on your mechanical connections ;)
     

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