GE 869 - Page 217

CHAPTER 4: SETPOINTS SYSTEM
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–85
Table 4-22: Contactor Status with both 52a and 52b configured
The following logic diagrams shos the detection logic for the contactor.
Figure 4-22: Contactor Connected/Disconnected (Racked-In/Racked-Out) detection for
withdrawable contactors
Figure 4-23: Contactor State Detection logic diagram
52a Contact
configured
52b Contact
configured
Contactor Status
Off On Contactor open
On Off Contactor closed
On On Contactor unknown state
Off Off Contactor unknown state
SETPOINT
CONNECTED
FlexLogic operand =1, Off = 0
FlexLogic operand status
AND
OR
FLEXLOGIC OPERANDS
Contactor Disconnected
FLEXLOGIC OPERANDS
Contactor Connected
894209A1.cdr
Setpoint
CONTACT INPUT 52a
Setpoint
CONTACT INPUT 52b
FlexLogic Operand
(52a state)
FlexLogic Operand
(52b status)
AND AND
XOR
30 ms
S
R
LED: ALARM
LATCH
OR
AND
OR
OR
RESET
(command)
ANDAND
OR
At least one contact programmed
(to output relays TRIP and CLOSE)
0ms
TARGET MESSAGE
Contactor Not Config
FLEXLOGIC OPERANDS
Contactor Closed
FLEXLOGIC OPERANDS
Contactor Opened
FLEXLOGIC OPERANDS
Contactor Unkwn Stat
FlexLogic Operand =1, Off = 0
FlexLogic Operand =1, Off = 0
FLEXLOGIC OPERANDS
Contactor Configured
894206A1.cdr