GE Multilin 489 Instruction Manual page 28

12
21
24
27
50/27
32
38
39
40
40Q
46
47
49
50
50BF
50
50/51GN
51V
59
59GN/27TN
60FL
67
76
81
86
87G
2–2
Courtesy of NationalSwitchgear.com
overspeed
distance
volts/hertz
undervoltage
inadvertent generator energization
reverse power/low forward power
bearing overtemperature (RTD)
bearing vibration (analog inputs)
loss of excitation (impedance)
loss of field (reactive power)
2
negative sequence overcurrent (I t)
2
voltage phase reversal
stator thermal (RTD/thermal model)
high-set phase overcurrent
breaker failure detection
offline overcurrent
ground overcurrent
voltage restrained phase overcurrent
overvoltage
100% stator ground
VT fuse failure
ground directional
overexcitation (analog input)
overfrequency/underfrequency
electrical lockout
percentage differential
sequential tripping logic
trip coil supervision
generator running hours alarm
Fault diagnostics are provided through pretrip data, event record, waveform capture, and
statistics. Prior to issuing a trip, the 489 takes a snapshot of the measured parameters and
stores them in a record with the cause of the trip. This pre-trip data may be viewed using
the key before the trip is reset, or by accessing the last trip data in actual values
NEXT
page 1. The event recorder stores a maximum of 256 time and date stamped events
including the pre-trip data. Every time a trip occurs, the 489 stores a 16 cycle trace for all
measured AC quantities. Trip counters record the number of occurrences of each type of
trip. Minimum and maximum values for RTDs and analog inputs are also recorded. These
features allow the operator to pinpoint a problem quickly and with certainty.
A complete list protection features is shown below:
52
41
GENERATOR
39
76
FIGURE 2–1: Single Line Diagram
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 2: INTRODUCTION
489
27
47
59
810
81U
40
24
21
32
38
40Q
12
50/27
49
51V
60FL
Output
46
relays
Output
49
86 6
relays
50BF
50 87G
RS232
RS485
RS485
67 50/51GN
Analog
+ 4
outputs
-
59GN 27TN
Analog
+ 4
-
inputs
808783E8.CDR