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  • Users: Birch
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  1. Birch

    Unbalanced load calculations.

    Ia = V/R1 Ib = V/(2*R2)*sqrt(((R1 + 2*R2)/R1)^2 + 3) Ic = V/R2 R = V^2/P Example: V = 230 V P1 = 2300 W P2 = 5000 W R1 = 23 ohm R2 = 10.58 ohm Ia = 10 A Ib = 28.1 A Ic = 21.7 A
  2. Birch

    GE relay 735 and IEEE Std C37.112-1996

    Hi The GE relay 735/737 defines ANSI inverse curves using a different formula than the IEEE standard C37.112-1996 for overcurrent inverse-time characteristics. Is this perhaps because the standard is newer than this relay? Why do then GE call the curves with name "ANSI"? Does such pre 1996...
  3. Birch

    IDMT formulae and IEEE C37.112.1996

    Hi The GE relay 735/737 defines ANSI inverse curves using a different formula than the IEEE standard C37.112-1996 for overcurrent inverse-time characteristics. Is this perhaps because the standard is newer than this relay? Why do GE call the curves with name "ANSI"? Does such pre 1996...

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