Relay Messages; Target Messages - GE 845 Instruction Manual

CHAPTER 3: INTERFACES
NOTE:

Relay Messages

Target Messages

845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Table 3-4: Active Target Icon
Description
When the target auto navigation setting is disabled, the message LED and the Active Target icon are
the only indication of active target messages.
Table 3-5: Breaker Health Icon
Description
The Breaker Health icon is blue when the setting for the breaker health function is not disabled.
When the setting is disabled the icon is grey.
Table 3-6: Settings Save Icon
Description
Indicates that a setting is being saved on the relay (i.e., when changing one of relay settings).
Icon is ON (relay is saving to flash memory)
Icon is OFF (relay is not saving to flash memory)
Do not remove power from the relay whenever the Settings Save icon is ON. When power
is removed the data being saved can also be lost.
Table 3-7: Local Mode Icon
Description
Indicates that Local Mode is active. During Local Mode, the control for the breakers and disconnect
switches can be performed only by the relay front panel.
Target Messages are displayed in order of their activation, whereas in cases of
simultaneous activation, they are displayed in the order outlined below (from highest to
lowest priority):
1. Targets generated by pressing programmable pushbutton
2. Targets generated by Contact inputs
3. Targets generated by Protection, Control and Monitoring elements
4. Targets generated by communications.
In cases where the Pickup and Operate flags from an element are detected at the same
time, the Pickup flag is not displayed. The Operate flag is displayed instead.
LED #6, from the first column of LEDs, is factory configured to be triggered by the
FlexLogic operand ANY TARGET, to indicate the presence of at least one target message.
This LED is labeled as "MESSAGE". The LED can be programmed to any other FlexLogic
operand by choice.
MESSAGE TIMEOUT:
The timeout applies to each screen that is different than the default screen to which the
user navigates. Examples include viewing, metering, or navigating to a screen with setting,
etc. If no further navigation is performed, no pushbutton is touched, and/or no target is
initiated for the time specified in the message timeout setpoint, the display goes back to
the default screen (the metering summary screen).
The target message interrupts the message timeout. It overrides it. The message timeout
starts timing after each target message, and if no more activity is recorded for the
specified time, the display goes back to the default screen.
Pressing a programmable pushbutton activates a new screen with a Target Message
corresponding to the programmed PB action. The PB Target Message is displayed for 10
seconds then defaults to the screen that was displayed before pressing the pushbutton.
The PB Target Message is recorded in the list with other generated Target Messages.
FRONT CONTROL PANEL INTERFACE
3–11