GEK-113032A W650 Wind Generator Protection System 2-3
2 PRODUCT DESCRIPTION 2.2 SUMMARY
2
2.2SUMMARY
2.2.1 ANSI DEVICE NUMBERS AND FUNCTIONS
DEVICE NUMBER FUNCTION
27P (4) Phase Undervoltage
27X (3) Auxiliary Undervoltage
32 (4) Directional Power
46 (3) Negative Sequence Time Overcurrent
50G (3)
Ground Instantaneous Overcurrent (measured from 4
th
current transformer)
50N (3) Neutral Instantaneous Overcurrent (calculated from the phase currents)
50P (6) Phase Instantaneous Overcurrent (two elements, High and Low)
50SG (3)
Ground Instantaneous Overcurrent for sensitive ground systems (measured from 5
th
current
transformer)
51G (3)
Ground Time Overcurrent (measured from 4
th
current transformer)
51N (3) Neutral Time Overcurrent (calculated from the phase currents)
51P (6) Phase Time Overcurrent with Voltage Restraint (two elements, High and Low)
51SG (3)
Ground Time Overcurrent for sensitive ground systems (measured from 5
th
current transformer)
59N (6) Neutral Overvoltage (two elements, High and Low)
59P (4) Phase Overvoltage
59X (3) Auxiliary Overvoltage
60V (3) Voltage Unbalance
67P (3) Phase Directional
67N (3) Neutral directional
67G (3) Ground Directional
67SG (3) Sensitive Ground Directional
79 (1) Autoreclose (Four shot recloser)
810 (4) Overfrequency
81U (4) Underfrequency
50BF (1) Breaker Failure
VTFF (1) VT Fuse Failure
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