GE 889 - Page 405

CHAPTER 4: SETPOINTS MONITORING
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–275
Figure 4-109: Frequency OOB Accumulation (with Accumulator 1) Logic Diagram
894162A1.CDR
FLEXLOGIC OPERAND
Freq OOB 1 Accum PKP
Input Signal Parameter
AND
FREQ ACCUM BLOCK:
SETPOINTS
RUN
VOLT MAG
MIN VOLT
SETPOINTS
V > Minimum
Frequency
Off
UPPER FREQ:
LOWER FREQ
f
LOWER
< f f
UPPER

SETPOINTS
AND
RUN
TIME LIMIT
TIME PRESET:
t
ACCUM
> t
LIMIT
SETPOINTS
Accumulating
FREQ OOB 1 ACCUM = (Actual
Accumulator Value 1/ TIME LIMIT
1)*100
ACTUAL VALUES
SETPOINTS
RESSET ACCUMULATORS
Freq OOB 1 Accum OP
OR
AND
AND AND
OR
LATC
H
S
R
RESET
Command
LED: Alarm
FUNCTION
SETPOINTS
Disabled = 0
ALARM
LATCH ALARM
SETPOINT
Output Relay 2 to X
Do Not Operate, Operate
CONFIGURABLE
FLEXLOGIC OPERAND
RESSET ACCUMULATORS < FREQ OOB 1 ACCUM
Slot J Card