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    omar2792's Avatar
    omar2792 Posts: 1, Reputation: 1
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    #1

    Jan 5, 2012, 09:48 AM
    What is the primary amprage of a 15 kva 480 volt 3 phase transformer?
    What is the primary amprage of a 3 phase 15 KVA 480 volt transformer
    cvander's Avatar
    cvander Posts: 10, Reputation: 1
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    #2

    Jan 8, 2012, 10:43 PM
    15kva*1000=15000va

    15000/480v*1.732(3phase)
    15000/831.36
    P amps=18.04A
    Breaker size P amps 18.04A*125% = 22.55Amp
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