Led Status Indicators - GE 845 Instruction Manual

FRONT CONTROL PANEL INTERFACE

LED Status Indicators

3–6
To change/view an item on from the 845 menus:
1. Use the pushbuttons that correspond to the tabs (Targets, Status, Metering, Setpoints,
Records) on the screen to select a menu.
2. Use the Up and Down pushbuttons to highlight an item.
3. Press Enter to view a list of values for the chosen item. (Some items are view-only.)
4. Use the Up and Down pushbuttons to highlight a value.
5. Press Enter to assign the highlighted value to the item.
Front panel LED details:
• Number of LEDs: 17
• Programmability: any logic variable, or virtual input
• Reset mode: self-reset or latched
The 845 front panel provides two columns of 7 LED indicators each, and 3 LED pushbutton
indicators. The "IN-SERVICE" (LED 1) and the "PICKUP" (LED 4) indicators from the first LED
column are non-programmable LEDs. The bottom 3 LED indicators from the first column,
and the 7 LED indicators from the second LED column are fully programmable. The
indicators "TRIP" (LED 2), and "ALARM" (LED 3), are also programmable, and can be
triggered by either a selection of FlexLogic operand assigned in their own menu, or by the
operation of any protection, control or monitoring element with function selected as Trip,
Alarm, or Latched Alarm.
The RESET key is used to reset any latched LED indicator or Target Message once the
condition has been cleared (latched conditions can also be reset via the RESETTING menu).
Figure 3-6: LEDs for 845 relay protecting 2W Xfmr
Figure 3-7: LEDs for 845 relay protecting 3W Xfmr
• IN SERVICE:
This LED indicates that control power is applied, all monitored inputs, outputs, and
internal systems are OK, and that the device has been programmed.
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INTERFACES