Standard Protective Functions

• Negative-sequence inverse time overcurrent (46)

• Winding thermal protection (49)

• Four-winding instantaneous phase overcurrent (50)

• Breaker Failure (50BF)

• Instantaneous ground overcurrent (50G)

• Instantaneous residual overcurrent (50N)

• Four-winding inverse time phase overcurrent (51)

• Inverse time ground overcurrent (51G)

• Inverse time residual overcurrent (51N)

• Two, three or four-winding phase differential (87T) and high set

instantaneous (87H)

• Ground differential (87GD)

• IPSlogic®

Optional Voltage Protection Package

• Overexcitation (24) V/Hz, two definite time and one inverse time

elements

• Phase Undervoltage (27) function for load shedding

• Phase Overvoltage (59)

• Ground Overvoltage (59G)

• Over/Underfrequency (81O/U)