1–4 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
DESCRIPTION OF THE 889 GENERATOR PROTECTION SYSTEM CHAPTER 1: INTRODUCTION
Figure 1-2: Single Line Diagram with order code option R1/R5)
Table 1-1: ANSI Device Numbers and Functions
50G
87GD
51G
64TN
51V 51N46 78
24 59P27P
25
Metering
Transient Recorder
Event Recorder
Trip
Close
40
59N 81U81O
59X
52
R
87G
50N
81R
50P
G
49
EX
889 Generator
Protection System
Slot J1 – Ph Bank
Slot K1 – Ph Bank
Slot J2 – Ph Bank
Slot J –Ground
Slot J – Vx
Slot J - Vx
R
RTD
50/27
67G
59_2
40Q
50SG 51SG 67SG
32
Slot K – Ground
(Sensitive or 50:0.025)
50N50P
50_2
50_2
38
76
dcmA
50OL
39
dcmA
47
50OFL
81A
49TOL
VTFF
50BF
Alternatives for connection
27X
Trip
Close
52
Monitoring
Slot K2 – Ph Bank
87O
67_2
67P 67N
894166A2.cdr
27TN
Monitoring
AFP
LIGHT
51N
ANSI Device Description
24 Volts per Hertz
25 Synchrocheck
27P Phase Undervoltage
27X Auxiliary Undervoltage
27TN Third Harmonic Neutral Undervoltage
32 Directional Power
38 Bearing Overtemperature (RTD)
39 Bearing Vibration (dcmA)
40 Loss of Excitation
40Q Reactive Power
46 Generator Unbalance
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