GE 869 Instruction Manual page 479

CHAPTER 4: SETPOINTS
FASTPATH:
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Select Before Operate
Once the breaker (contactor) or the switch is highlighted in the SLD using the navigation
PBs, the component must be selected before open or close action is performed. The
selection of the component is performed by pressing "ENTER" key from the front panel (see
Figure 4-151:Navigation and SLD component
or "Sw # Selected" appears on the screen to denote the selection. Once selected, the text
from the first three tabs from the display corresponding to the PBs 1, 2, and 3 changes to
"Tag", "Block", and "Bypass". At this stage, the selected breaker (contactor) or switch can be
Opened or Closed using the programmed PBs, and Tagged/Blocked/Bypassed using the
SLD PBs.
For PBs supporting one breaker only, the Local Control Mode menu includes the setpoint
"Select Before Operate", which can be set to either Enabled or Disabled. When it is set to
Disabled, tagging, blocking and block bypassing commands are disabled from both Local
and Remote control. In this mode the breaker (contactor) can be controlled directly by the
programmed Open and Close PBs. The local control for the disconnect switches is
suspended. In this mode they can only be controlled remotely, i.e. using pre-programmed
contact inputs, virtual inputs, comms, or any selected FlexLogic operand for closing and
opening commands. The remote block and block bypass flags are also suspended. With
Select Before Operate set to Disabled the relay behaves similar to some other legacy
relays, where when in Local mode the breaker is directly controlled by pressing the Open
and Close PBs without additional confirmation, and when in Remote mode the breaker is
directly controlled by executing the remote open and close commands from the
configured setpoints.
When the "Select Before Operate" setpoint is set to Enabled, the navigation, the breaker or
switch selection, as well as the blocking, bypassing and tagging are operational when in
Local mode. When switched to Remote mode, the remote blocking and bypassing will be
operational as well.
The selected component from SLD will be deselected if either the time programmed in
setpoint "Bkr/Sw Select Timeout" expires, or the PB "ESCAPE" is pressed. The "HOME"
button will not de-select the selected object. To navigate to home page, the component
must be first de-selected on the SLD page.
The programmed PBs for breaker (contactor) or switch Open and Close can be used only in
local mode when an active object is selected in the SLD. The selected device can be
opened or closed provided it is not blocked or tagged. If no operation is detected, the
selection is removed, and the user must press the select PB again to enable the selection.
The local mode breaker (contactor) selection and operation is only active if the user has
proper level security access.
selection). A flash message " BKR # Selected",
CONTROL
4–347