GE 889 - Page 271

CHAPTER 4: SETPOINTS PROTECTION
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–141
Figure 4-49: Loss of Excitation Logic Diagrams: (a) circle 1
CIRCLE1 DIAMETER
CIRCLE1 OFFSET
SETTING
SETTING
Enabled=1
Disabled=0
J- Slot Measurements
I1
V1
FLEXLOGIC OPERANDS
FLEXLOGIC OPERAND
LOE Circle 1 PKP
LOE Circle 1OP
0
I 1 >0. 05 x CT
RUN
COMPARATOR
CIRCLE1 UV
SUPERVISION
TIMER
20ms
0
SETPOINTS
CIRCLE1 FUNCTION: Disabled= 0
Trip
Operate Output Relay 1( TRIP)
Alarm
OR
OR
AND
Latched Alarm
AND
BLOCK Off = 0
LED: ALARM
RESET
Command
AND
S R
LATCH
Configurable
LED: TRIP
Set Dominant
SETPOINTS
AND
OR
IV1 | < PKP
RUN
SETTING
AND
SETTING
RUN
t
pkp
CIRCLE1 DELAY
CIRCLE1
UV SUPERVISION
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