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460 volt single phase ?

Discussion in 'Residential' started by aircooled, May 8, 2008.

  1. aircooled

    aircooled New Member

    Messages:
    1,139
    Location:
    no place, but Texas
    New technician called me today and ask question, I'm on one of those wall units' meaning a Bard..I have 460 volt (3) phase and 460 volt single phase motor..:shocked: What, I have never seen 460 volt single phase motor most are 230 volt.Did you check the voltage to motor,yes 460 to ground.What is it from contactor, 460v..Ok, pull motor and bring it with you.
  2. Chilled Man

    Chilled Man New Job ....... 2010

    Messages:
    3,067
    Location:
    Your Moms House
    theres 230/1/60 to 230/3/60 but never heard of 460/1/60 I dont think thats possilbe :tard:
  3. Ozz

    Ozz Gotta luv hillbilly women!

    Messages:
    212
    Location:
    Toronto
    Carrier rooftops. Their combustion motors are 460/1/60. Very common...
    The rooftop could be 575/3/60 but they'll have a stepdown tformer and use only two legs not three...
  4. SlimWoodie

    SlimWoodie I Be Bant

    Messages:
    2,113
    460 to gnd, is not possible, unless a Separately Derived system, and in that case ..

    it wouldn't be ground
  5. Fat Eddy

    Fat Eddy Later

    Messages:
    4,443
    Yeah some units use it. York also uses it on there vent motors.
  6. Fat Eddy

    Fat Eddy Later

    Messages:
    4,443
    Two of the three phases makes single phase, it isn't to ground or nuetral, just use two of the leads and you have 460 single phase. One leg to ground would be 277 more commonly used for lighting in a building.
  7. Abby Normal

    Abby Normal On Permanent Vacation

    Messages:
    8,897
    Location:
    19.3 North
    460 or 480/1/60 is possible, across two legs

    Seen equipment with 480V single phase blower motors before

    Look at at small three phase package unit or condenser sometimes , say something 3 to 5 tons, the condenser fans and blower motors are not three phase.

    If it is trane stuff the motors are all dual voltage.
  8. genesis

    genesis Bass fishing guru

    Messages:
    3,433
    Location:
    Lubbock, TX
    Lennox L series up to 5 tons use it. I don't like it I have seen a lot of fires from the motor shorting out and the circuit being so small it would pop the fuse or breaker so it just set there and smoldered when the motor was burning out. Home Depot has a lot of these on there roofs.
  9. absrbrtek

    absrbrtek Pleb

    Messages:
    766
    Location:
    Plebsville USA
    460V single phase is around.
  10. Bustawrench

    Bustawrench Interchangeable Unit of Labor

    Messages:
    8,863
    Trane, McQuay, Westinghouse............Changed 406/1/60 Cond Fan Motors in these three brands in the last two weeks.
  11. DPSwitch

    DPSwitch Forget the hearse....

    Messages:
    64,051
    Location:
    Mid-Atlantic
    460 single phase sure........ 460 to ground? Never seen that.
  12. NZ All Blacks Fan

    NZ All Blacks Fan Just Another swinging Dick

    Messages:
    7,723
    Location:
    West Coast - Canada
    yes lots of units use it - the eqv here in cananda is 575/600V

    single to ground is 347V - also used in lighting in comm buildings ( considered the most dnagerous voltage as it kills more electricans and wannabe electricans than all other voltages combined.

    lots aof rtus and even WSHPS - so watch out

    Lennox puts a trans in and uses a 460 v motor as well from 575
  13. aircooled

    aircooled New Member

    Messages:
    1,139
    Location:
    no place, but Texas
    Well, I worked on 460 in the 1980 for Rowe machinery in Dallas and understand voltage, but,I have never seen or heard of 460/1/60.

    This motor is in of of those wall units; like fit on out source buildings or job site trailers.
    Bard he said motor was over amp, hot. Told him to pull it so we can make sure tomorrow at Friday Morning meeting and parts stock. I need to look at it myself, to be sure.
  14. pabull

    pabull Tard on guard

    Messages:
    3,212
    Location:
    PA
    It most definitely IS possible. I've changed quite a few on MRI units that were 460/1/60. They're few and far between...but they do exist. A Bard is a unit where you would find them.:biggrin:
  15. hvaclover

    hvaclover New Member

    Messages:
    5,089
    Location:
    in a state of confusion
    460 convinced me I should stay off roof tops.

    That stuff hurts.
  16. NZ All Blacks Fan

    NZ All Blacks Fan Just Another swinging Dick

    Messages:
    7,723
    Location:
    West Coast - Canada
    don't forget it can be lurking in water source heatpumps too!
  17. Ozz

    Ozz Gotta luv hillbilly women!

    Messages:
    212
    Location:
    Toronto
    Ya big baby...:tongue:
  18. milk man

    milk man New Member

    Messages:
    456
    Location:
    Kansas
    Probably that stupid sears meter you where using.:tongue:

    Carrier CFM is dual voltage single phase now.
  19. aircooled

    aircooled New Member

    Messages:
    1,139
    Location:
    no place, but Texas
    Geary Pacific -Bard dealer had (1) 460v single phase motor to replace that one, had office call them to insure right motor was replaced.

    Never to Old to see a new item or help repair something you never seen before..:shocked::thumb:
  20. Dutchcool

    Dutchcool New Member

    Messages:
    6,641
    Location:
    Eindhoven Netherlands Europe
    Don't you guys use differend threrms for that ?

    There is line voltage :
    this is the voltage between two legs.

    There is fase voltage =
    This is the voltage between [any] one leg and neutral or ground.
    The line voltage will be : fase Voltage times the sq root 3 ( 1,73...)

    example 230 V fase voltage delivers 230xV3= 400Volt.
    [ 230/400 is the common thing here in Eu ]

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