GE 869 Instruction Manual page 217

CHAPTER 4: SETPOINTS
Setpoint
CONTACT INPUT 52a
FlexLogic Operand =1, Off = 0
Setpoint
CONTACT INPUT 52b
FlexLogic Operand =1, Off = 0
FlexLogic Operand
(52a state)
FlexLogic Operand
(52b status)
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Table 4-22: Contactor Status with both 52a and 52b configured
52a Contact 52b Contact
configured configured
Off On
On Off
On On
Off Off
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
FlexLogic operand status
SETPOINT
CONNECTED
FlexLogic operand =1, Off = 0
Figure 4-23: Contactor State Detection logic diagram
RESET
(command)
Contactor Status
Contactor open
Contactor closed
Contactor unknown state
Contactor unknown state
LED: ALARM
30 ms
S
0 ms
LATCH
R
SYSTEM
FLEXLOGIC OPERANDS
Contactor Disconnected
FLEXLOGIC OPERANDS
Contactor Connected
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TARGET MESSAGE
Contactor Not Config
At least one contact programmed
(to output relays TRIP and CLOSE )
FLEXLOGIC OPERANDS
Contactor Configured
FLEXLOGIC OPERANDS
Contactor Closed
FLEXLOGIC OPERANDS
Contactor Opened
FLEXLOGIC OPERANDS
Contactor Unkwn Stat
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