1–4 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
DESCRIPTION OF THE 869 MOTOR PROTECTION SYSTEM CHAPTER 1: INTRODUCTION
Table 1-2: Other Device Functions
50SG Ground Fault
50LR Mechanical Jam
50N Neutral Instantaneous Overcurrent
50P Phase Instantaneous Overcurrent
50_2 Negative Sequence Instantaneous Overcurrent
51G Ground Time Overcurrent
51N Neutral Time Overcurrent
51P Phase Time Overcurrent
52 AC Circuit Breaker
55 Power Factor
59N Neutral Overvoltage
59P Phase Overvoltage
59X Auxiliary Overvoltage
59_2 Negative Sequence Overvoltage
66 Maximum Starting Rate
67N Neutral Directional Element
67P Phase Directional Element
78 Out-of-Step Protection
81O Overfrequency
81U Underfrequency
81R Frequency Rate of Change
86 Start Inhibit
87S Stator Differential
AFP Arc Flash Protection
VTFF Voltage Transformer Fuse Failure
Description
Acceleration Time
Analog Input
Analog Output
Breaker Arcing Current (I
2
t)
Broken Rotor Bar
Switching Device Control
Breaker Control
Breaker Health
Data Logger
Demand
Digital Counters
Event Recorder
Fault Report
Flexelements
FlexLogic Equations
Flexstates
IEC 61850 Communications
Mechanical Jam
Metering: current, voltage, power, PF, energy, frequency, harmonics, THD
ANSI Device Description
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