GE 889 - Page 380

4–250 889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION CHAPTER 4: SETPOINTS
Figure 4-97: Out-of-step Protection Logic Diagram
894138A.cdr
SETPOINT
BLOCK : Off=0
AN D
SETPOINT
FUNCTION : Alarm Latched Alarm Configurable
OR
OOS Lft Bld PKP
FlexLogic Operands
AN D AND
Command
RESET
OR
LED: ALARM
S
LATCH
Set-
Dominant
R
SETPOINT
OUTPUT RELAY X : Do Not Operate , Operate
Disabled
SETPOINT
PICKUP DELAY :
t
PKP
0
OOS Timer PKP OOS OP
OOS Rgt Bld PKP
Mho
SETPOINTS
RUN
MHO FWD REACH : MHO REV REACH : RIGHT BLINDER : LEFT BLINDER : BLINDERS RCA :
S Q1
LATCH1
Reset-
Dominant
R
Trip
SETPOINT
TRIP MODE : Blinder Exit Mho Exit
AND
OR
SETPOINT
SEAL -IN DELAY :
0
t
RST
AN D
LED: TRIP
Trip
AND
Left Blinder RUN Right Blinder RUN
0
0.5 cyc
| I_1 | > PICKUP RUN
SETPOINT
POS SEQ CURR SUPV :
SIGNAL INPUT :
SETPOINT
V_1 I_1
XOR
AN D AND AND
0
0.5 cyc
S Q3
LATCH3
Reset-
Dominant
R S Q4
LATCH4
Reset-
Dominant
R
ANDAND
AND
0
0.5 cyc
ANDAN D
S Q2
LATCH2
Set-
Dominant
R
OR