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FRONT CONTROL PANEL INTERFACE
Relay messages
Target messages
Self-test errors
CAUTION:
3–8
Target messages are automatically displayed for any active condition on the relay such as
pickups, trips, or alarms.
The relay displays the most recent event first, and after 5 seconds will start rolling up the
other target messages until the conditions clear and/or the RESET command is initiated.
The Target Messages can be reviewed by pressing either the MESSAGE UP or MESSAGE
DOWN key. If a RESET command is not performed but any of the other faceplate
pushbuttons is pressed, the display will not show the target messages unless the user
navigates to
ACTUAL VALUES > A4 TARGET MESSAGES
target messages have not been cleared before the user presses a pushbutton different
from "RESET", they will reappear on the screen after the time specified under the
SETPOINTS > S1 RELAY SETUP > FRONT PANEL > MESSAGE TIMEOUT
timing out from the last pressed pushbutton. The following shows the format of a typical
Target Message:
Figure 3-5: Typical target message
Example of a Phase IOC1 operation - phase A:
Phase IOC1 function: Trip
Cause <Function>
The first line contains information of the cause of operation (the name of the operated
element), and the element function.
State: Operate
This line from the display shows the state of the element: Pickup, Operated, Alarm.
Phase: A
The last line from the display shows the phase that picked up or operated.
The relay performs self diagnostics at initialization (after power up), and continuously as a
background task to ensure that the hardware and software are functioning correctly.
There are two types of self-test warnings indicating either a minor or major problem. Minor
problems indicate a problem with the relay that does not compromise protection of the
power system. Major errors indicate a problem with the relay which takes it out of service.
Self-Test Warnings may indicate a serious problem with the relay hardware!
Upon detection of a minor problem, the relay will:
•
Turn on the "TROUBLE" LED at the same time as the "IN SERVICE" LED is on.
•
Display the error on the relay display.
, where they can be reviewed. If the
A4 TARGET MESSAGES
Cause <function>
State: Operate
▼
Phase:
A4 TARGET MESSAGES
Ph IOC1 Trip
State: Operate
▼
Phase:A
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INTERFACES
setting, that will start
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