GE 889 - Page 15

CHAPTER 1: INTRODUCTION DESCRIPTION OF THE 889 GENERATOR PROTECTION SYSTEM
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–5
Table 1-2: Other Device Functions
47 Phase Reversal
49 Thermal (RTD)
49TOL Thermal Overload
50/27 Inadvertent Energization
50BF Breaker Failure
50G Ground Instantaneous Overcurrent
50SG Sensitive Ground Instantaneous Overcurrent
50N Neutral Instantaneous Overcurrent
50P Phase Instantaneous Overcurrent
50_2 Negative Sequence Instantaneous Overcurrent
50OFL Offline Overcurrent
50OL Overload
51G Ground Time Overcurrent
51N Neutral Time Overcurrent
51SG Sensitive Ground Time Overcurrent
51V Voltage Restrained Time Overcurrent
55 Power Factor
59N Neutral Overvoltage
59P Phase Overvoltage
59X Auxiliary Overvoltage
59_2 Negative Sequence Overvoltage
64TN 100% Stator Ground using 3rd Harmonic Voltage Differential
67G Ground Directional Element
67N Neutral Directional Element
67P Phase Directional Element
67SG Sensitive Ground Directional Element
67_2 Negative Sequence Directional Element
76 Excitation Current Protection (dcmA)
78 Out-of-step Protection
81A Frequency out-of-band
81O Overfrequency
81U Underfrequency
81R Frequency Rate of Change
87G Generator Stator Differential
87O Overall Unit (Gen-Xfrm) Protection
87GD Restricted Ground Fault (RGF)
AFP Arc Flash Protection
VTFF VT Fuse Failure
Description
Analog Input
Analog Output
Breaker Arcing Current (I
2
t)
Breaker Control
Breaker Health
Data Logger
ANSI Device Description