GE 845 Instruction Manual page 239

CHAPTER 4: SETPOINTS
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)
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Table 4-19: Breaker status depending on availability of contacts 52a and 52b
52a Contact Configured
Yes
Yes
No
No
Table 4-20: Breaker status with both contacts 52a and 52b configured
52a Contact Status
Off
On
On
Off
Figure 4-31: Breaker Connected/Disconnected (Racked-In/Racked-Out) Detection
FlexLogic operand status
SETPOINT
BKR 1 CONNECTED
FlexLogic operand =1, Off = 0
Figure 4-32: Breaker State Detection logic diagram
BKR 1 NOT CONFIGURED
RESET
(command)
52b Contact Configured Breaker Status
Open
Yes 52a contact open
52b contact closed
No 52a contact open
Yes 52b contact closed
No Breaker Not Configured
52b Contact Status
On
Off
On
Off
TARGET MESSAGE
At least one contact programmed
(to Trip and Close output relays)
FLEXLOGIC OPERANDS
BKR 1 Configured
PB LED: BREAKER CLOSED
FLEXLOGIC OPERANDS
BKR 1 Closed
PB LED: BREAKER OPENED
BKR 1 Opened
30 ms
Closed
52a contact closed
52b contact open
52a contact closed
52b contact open
Breaker Status
BKR Opened
BKR Closed
BKR Unknown State
BKR Unknown State
FLEXLOGIC OPERANDS
BKR 1 Disconnected
FLEXLOGIC OPERANDS
BKR 1 Connected
894207A1.cdr
FLEXLOGIC OPERANDS
LED: ALARM
S
FLEXLOGIC OPERANDS
LATCH
BKR 1 Unkwn State
892740A2.cdr
R
SYSTEM
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