Breakers - GE 889 Instruction Manual

SYSTEM

Breakers

NOTE:
NOTE
4–86
The breaker connection/disconnection to/from the power system (racked-out by the
breaker racking mechanism, or isolated by the associated disconnect switches on a fixed
circuit breaker) is provided by monitoring the contact input "BKR CONNECTED". If the
contact input selected under the "BKR CONNECTED" setpoint is asserted, the breaker is
considered connected to the primary system. When the breaker is determined
disconnected, the breaker state is shown to be neither open, nor closed.
NAME
Range: Up to 13 alphanumeric characters
Default: BKR1 (BKR2)
CONTACT INPUT 52a
Range: Off, Any FlexLogic operand
Default: Off
Selects the Contact Input connected to the breaker auxiliary contact 52a.
CONTACT INPUT 52b
Range: Off, Any FlexLogic operand
Default: Off
Selects the Contact Input connected to the breaker auxiliary contact 52b.
CONNECTED
Range: Off, Any FlexLogic operand
Default: Off
Select a contact input to show whether the breaker is connected (Racked-in, or
disconnect switches switched-on), or disconnected (racked-out, or disconnect switches
switched-off) from the system.
TRIP RELAY SELECT
Range: Off, Relay X
Default: Relay 1
For the 889 with two breakers, any output relay from the list of available output relays
can be programmed for breaker tripping action. Please refer to the table from the
section Output Relaysfor more detail on output relay availability with respect to their
assignment.
CLOSE RELAY SELECT
Range: Off, Any Output Relay (889 with two breakers),
Relay 2 to Relay X (889 with one breaker)
Default: Relay 2
Refer to the table from the section
availability with respect to their assignment.
For the 889 with one breaker, if "Relay 2" is selected, Auxiliary Relay 2 is not available for
selection in any element.
Table 4-18: Breaker status depending on availability of contacts 52a and 52b
52a Contact Configured
Yes
Yes
No
No
Output Relays for more detail on output relay
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
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Closed
52a contact closed
52b contact open
52a contact closed
52b contact open