4–78 869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
SYSTEM CHAPTER 4: SETPOINTS
CONTACT INPUT 52b
Range: Off, Any Contact Input
Default: Off
Select the contact input connected to the breaker or contactor auxiliary contact 52b.
CONNECTED
Range: Off, Any Contact Input
Default: Off
Select a contact input to show whether the breaker or contactor is connected (Racked-
in, or disconnect switches switched-on) or disconnected (racked-out, or disconnect
switches switched-off) to the system.
CLOSE RELAY SELECT
Range: Off, Relay 2
Default: Off
Selection of Relay 2 assigns the START command to Output Relay 2 (CLOSE/AUX).
FAST PATH:
If “Relay 2” is selected, Auxiliary Relay 2 is not available for selection in any element in the
869. If “Off” is selected, Auxiliary Relay 2 is available for selection in all elements with
auxiliary relay selection in the 869 and it is not activated by the START command.
The logic for breaker or contactor configuration and the Open/Close status is shown in the
tables below:
Breaker or contactor status with both contacts 52a and 52b configured:
The following logic diagram shows the detection logic for breaker and contactor.
Figure 4-17: Breaker/Contactor State Detection logic diagram
52a Contact
configured
52b Contact
configured
Breaker or Contactor Status
Open Closed
Yes Yes 52a contact open
52b contact closed
52a contact closed
52b contact open
Yes No 52a contact open 52a contact closed
No Yes 52b contact closed 52b contact open
No No Breaker or contactor not configured
52a Contact
configured
52b Contact
configured
Breaker or Contactor Status
Off On Breaker or contactor open
On Off Breaker or contactor closed
On On Breaker or contactor unknown state
Off Off Breaker or contactor unknown state
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