GE Multilin 850

CHAPTER 4: SETPOINTS SYSTEM
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 4–75
Table 4-21: Breaker status with both contacts 52a and 52b configured
Figure 4-16: Breaker Connected/Disconnected (Racked-In/Racked-Out) Detection
Figure 4-17: Breaker State Detection logic diagram
52a Contact Status 52b Contact Status Breaker Status
Off On BKR Opened
On Off BKR Closed
On On BKR Unknown State
Off Off BKR Unknown State
SETPOINT
BKR 1 CONNECTED
FlexLogic operand =1, Off = 0
FlexLogic operand status
AND
OR
FLEXLOGIC OPERANDS
BKR 1 Disconnected
FLEXLOGIC OPERANDS
BKR 1 Connected
894207A1.cdr
SETPOINT
52a CONTACT
FlexLogic operand =1, Off = 0
SETPOINT
52b CONTACT
FlexLogic operand =1, Off = 0
FlexLogic operand
(BKR 52a state)
FlexLogic operand
(BKR 52b status)
AND AND
XOR
30 ms
S
R
PB LED: BREAKER CLOSED
PB LED: BREAKER OPENED
LED: ALARM
LATCH
OR
AND
OR
OR
RESET
(command)
ANDAND
FLEXLOGIC OPERANDS
BKR 1 Closed
FLEXLOGIC OPERANDS
BKR 1 Opened
FLEXLOGIC OPERANDS
BKR 1 Unkwn State
OR
At least one contact programmed
(to Trip and Close output relays)
TARGET MESSAGE
BKR 1 NOT CONFIGURED
FLEXLOGIC OPERANDS
BKR 1 Configured
892740A2.cdr