GE Multilin 850

CHAPTER 4: SETPOINTS MONITORING
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–267
Figure 4-115: Breaker Health and Operation logic diagram
89$1.cdr
SETPOINTS
BLOCK :
Off= 0
AND
SETPOINTS
BKR HEALTH
FUNCTION :
Disabled
Alarm
Latched Alarm
Configurable
OR
t _arc_A
START
FlexLogic Operands
BKR1 Hlth Trip PKP
AND AND
Command
RESET
OR
LED : ALARM
S
LATCH
Set-
Dominant
R
SETPOINTS
BKR HEALTH
MODE :
Detection
Monitoring
SETPOINTS
BKR HEALTH
TRIP TRIGER :
Off=0
SETPOINTS
BKR HEALTH
BKR OPEN STATUS :
Off=0
Current Inputs
Phase A Current (ia)
Phase B Current (ib)
Phase C Current (ic)
STOP
ia < 0.02 xCT for one cyc
ib < 0.02 xCT for one cyc
ic < 0.02 xCT for one cyc
t _arc_B
START
STOP
t _arc_C
START
STOP
t _trip
START
STOP
t_
trip ≥ PKP
RUN
SETPOINTS
BKR HEALTH
TRIP TIME PICKUP :
(t_arc_A-t_trip-1 cyc) ≥ PKP
RUN
SETPOINTS
BKR HEALTH
ARC TIME PICKUP :
(t_arc_B-t_trip-1 cyc) ≥ PKP
RUN
(t_arc_C-t_trip-1 cyc) ≥ PKP
RUN
SETPOINTS
BKR HEALTH
CLOSE TRIGER :
Off=0
SETPOINTS
BKR HEALTH
BKR CLOSE STATUS :
Off=0
SETPOINTS
BKR HEALTH
SPRING CHARGE
STATUS :
Off=0
t _close
START
STOP
t _charge
t_close ≥ PKP
RUN
SETPOINTS
BKR HEALTH
CLOSE TIME PICKUP :
t_charge ≥ PKP
RUN
SETPOINTS
BKR HEALTH
CHARGE TIME PICKUP :
START
START
START
Arc Energy Inputs
IA
2
t cycle
IB
2
t cycle
IC
2
t cycle
IA
2
t ≥ PKP
RUN
SETPOINTS
BKR HEALTH
ARC ENERGY PICKUP :
IB
2
t ≥ PKP
RUN
IC
2
t ≥ PKP
RUN
BKR1 Hlth Cls PKP
BKR1 Engy PKP A
BKR1 Hlth Chg PKP
OR
OR
OR
BKR1 Engy PKP B
BKR1 Engy PKP C
BKR1 Arc PKP B
BKR1 Arc PKP C
BKR1 Hlth PKP
BKR1 Arc PKP A
t_IAT
RUN
SETPOINTS
BKR HEALTH
INCOMPLETE ARC
TIME :
t_IAT
t_IAT
OR
AND
OR
AND
AND
OR
AND AND
OR
AND
t_ITCT
RUN
SETPOINTS
BKR HEALTH
INCOMPLETE TRP /CLS
TIME :
OR
OR
AND
OR
AND
t_ICT
RUN
SETPOINTS
BKR HEALTH
INCOMPLETE CHARGE
TIME:
BKR1 Arc Fail
BKR1 Hlth OP Fail
BKR1 Charge Fail
OR
AND
Command
RESET
AND
AND
AND
IN
Counter
RESET
Real Counter ≥ Alarm
RUN
SETPOINTS
BKR HEALTH
ALARM COUNTER :
Command
CLEAR
SETPOINTS
OUTPUT RELAY X
Do Not Operate, Operate