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    addaddadd's Avatar
    addaddadd Posts: 19, Reputation: 1
    New Member
    		  
    #1

    Mar 28, 2008, 11:36 PM
    Wye delta starter
    At 440 volts, What motor rating in KW I will use wye delta starter.
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #2

    Mar 29, 2008, 03:19 AM
    Quote Originally Posted by addaddadd
    at 440 volts, What motor rating in KW i will use wye delta starter.
    Star/Delta Starters are required to be fitted on all motors greater than 4KW (about 5 HP).
    The applied voltage is irrelevant. Only the power requirement is the official deciding factor.
    Of course nothing holds you back to install it on any smaller 3 phase motor.
    They are used to reduce the start current applied to the motor during start.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Mar 29, 2008, 05:06 AM
    Quote Originally Posted by addaddadd
    at 440 volts, What motor rating in KW i will use wye delta starter.
    I have NO idea what you are asking.
    Regardless...


    THIS IS NOT DIY WORK!!! CALL AN ELECTRICIAN!!!
    mackycan's Avatar
    mackycan Posts: 2, Reputation: 1
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    #4

    Jan 31, 2010, 11:59 PM
    Quote Originally Posted by Credendovidis View Post
    Star/Delta Starters are required to be fitted on all motors greater than 4KW (about 5 HP).
    The applied voltage is irrelevant. Only the power requirement is the official deciding factor.
    Of course nothing holds you back to install it on any smaller 3 phase motor.
    They are used to reduce the start current applied to the motor during start.
    As for me, I recommend him to use wye-delta starter for 7.5hp and higher. For < 7.5hp just use CB and inverter, or cb and contactor (you can't vary the speed though)...
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