S4 Elements745Transformer Management RelaySetpointshttp://www.GEindustrial.com/multilin5ñ74 GE MultilinFIGURE 5ñ34: Volts Per Hertz Curve 2The curve for the inverse curve 3 shape is derived from the formula:(EQ 5.14)where T = operate time (seconds)D = delay setpoint (seconds)V = fundamental RMS value of voltage (V)F = frequency of voltage signal (Hz)Pickup = volts-per-hertz pickup setpoint (V/Hz)FIGURE 5ñ35: Volts Per Hertz Curve 30.111010010001.00 1.20 1.40 1.60 1.80 2.00Multiples of Volts/Hertz PickupTimeDelaySetting10310.30.1Time to Trip (seconds)T DV F⁄Pickup-------------------   0.51–------------------------------------------= when VF---- Pickup>0.11101001000100001.00 1.20 1.40 1.60 1.80 2.00Multiples of Voltz/Hertz PickupTimeDelaySettingò31010.30.1Time to Trip (seconds)

GE Multilin 745 Instruction Manual