GE 889 Instruction Manual page 477

CHAPTER 4: SETPOINTS
NOTE:
NOTE
CAUTION:
889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Path:
Setpoints > Control > Local Control Mode
For this path the HMI menus vary depending on the order code and the number of
breakers selected.
For relays supporting single breaker control, the SW Local Open and SW Local Close
setpoints appear in the menu only if the relay is ordered with Advanced SLD; and the
"Select Before Operate" setpoint is set to "Enabled". In all other cases, these setpoints are
hidden and inactive.
SELECT BEFORE OPERATE
Range: Disabled, Enabled
Default: Disabled
This setpoint is included in the Local Control Mode menu only if the 8-series relay
supports one breaker. This setpoint is omitted for relays supporting more than one
breaker.
When the Select Before Operate (SBO) is set to Disabled, and Local Mode is set, the
breaker control can be performed directly by pressing the corresponding front panel
pushbuttons (or those mounted in close proximity to the relay). No component selection
or additional confirmation is needed. The same applies when the breaker control is in
Remote mode.
When SBO is disabled, all local and remote flags such as blocking, bypassing, and
tagging are reset.
Setting the SBO to Enabled enables the navigation and the selection of a component
from the SLD, so that the pushbuttons Open or Close from the front panel (or those
mounted in close proximity to the relay) can be used in Local Mode only after the
component is selected. All flags such as blocking, bypassing and tagging can be initiated
during this mode. Blocking and bypassing can also be initiated remotely, when in
Remote Mode.
LOCAL MODE
Range: Off, On, Any FlexLogic operand
Default: order code dependant (On or Pushbutton 5 OFF)
For the 10 PB faceplate 11-A
Range: Off, On, Any FlexLogic operand
Default: Pushbutton 5 Off
The LOCAL MODE setting places the relay in local mode. The relay is in Remote mode, if
not forced into Local mode by this setpoint (i.e. LOCAL mode set to Disabled, or the
selected input de-asserted). When in Local Mode, both Breakers and Disconnect
switches can be controlled using the faceplate pushbuttons and SLD pushbuttons.
BKR SW SELECT TIMEOUT
Range: 1 to 10 min in steps of 1 min
Default: 5 min
This setting specifies the available time for open/close commands, after a breaker or a
disconnect switch has been selected in the single line diagram.
BKR LOCAL OPEN
Range: Off, Pushbutton 1 ON,.......Pushbutton 10 ON, Contact Input X
Default: Pushbutton 1 ON
This setpoint is active, when Local Mode is activated. The breaker open command can be
initiated by the selected faceplate pushbutton.
CONTROL
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