Led Status Indicators - GE 339 Instruction Manual

FRONT CONTROL PANEL INTERFACE

LED status indicators

3–4
When the display shows SETPOINTS, pressing the MESSAGE ► key or the ENTER key will
display the page headers of programmable parameters (referred to as setpoints in the
manual). When the display shows ACTUAL VALUES, pressing the MESSAGE ► key or the
ENTER key displays the page headers of measured parameters (referred to as actual
values in the manual).
Each page is broken down further into logical sub-pages of messages. The MESSAGE ▲
and MESSAGE ▼ keys are used to navigate through the sub-pages. A summary of the
setpoints and actual values pages can be found in the Chapters : Setpoints and Actual
Values, respectively.
The ENTER key is dual purpose. It is used to enter the sub-pages and to store altered
setpoint values into memory to complete the change. The MESSAGE ► key can also be
used to enter sub-pages but not to store altered setpoints.
The ESCAPE key or the MESSAGE key can be used to exit the sub-pages.
The VALUE keys are used to scroll through the possible choices of an enumerated setpoint.
They also decrement and increment numerical setpoints.
The RESET key resets any latched conditions that are not currently active. This includes
resetting latched output relays, latched Trip LEDs, breaker operation failure, and trip / close
coil failures.
The MESSAGE ▲ and MESSAGE ▼ keys scroll through any active conditions in the relay.
Diagnostic messages are displayed indicating the state of protection and monitoring
elements that are picked up, operating, or latched.
• IN SERVICE: Green
– Turns "ON" when the relay does not have any major self-test error.
– Minor self-test targets will not de-activate the LED.
• TROUBLE: Amber
– Turns "ON" when either a major or minor self-test error has occurred.
– Will be latched "ON" for major self-test errors, except for "RELAY NOT READY".
– Will be self-resetting for minor self-test errors.
• TRIP: Red
– Turns "ON" when a protection element has been assigned to trip and the element
has been activated.
– Will be latched "ON" until a reset command occurs.
– Turns "OFF" when a reset has been initiated through the front panel,
communications, or digital inputs, and the fault has been cleared.
• ALARM: Amber
– Flashes "ON" and "OFF" when a protection, control, or maintenance element has
been assigned to alarm and the element has been activated.
– Will be latched "ON" if "Latched Alarm" is set and the fault has been cleared.
– Will be self-resetting if "Alarm" is set and the fault has been cleared.
– Turns "OFF" when a reset has been initiated through the front panel or
communications, and the fault has been cleared, if "Latched Alarm" is set.
• PICKUP: Amber
– Turns "ON" when a protection element setting threshold has been exceeded. LED
will turn "OFF" when the values go below the threshold.
• MAINTENANCE: Amber
– Turns "ON" when either the Trip or the Close Coil Monitor element is activated, or
the Trip Counter has exceeded the programmed value.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INTERFACES