Home Screen Icons - GE 845 Instruction Manual

CHAPTER 3: INTERFACES
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Home Screen Icons

845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
– Green color = Relay powered up, passed self-test has been programmed, and
ready to serve.
– Red color = Relay failed self test, has not been programmed, or out of service
• TRIP:
This LED indicates that the element selected to produce a trip has operated. This
indicator always latches; as such, a Reset command must be initiated to allow the
latch to be reset.
• ALARM:
This LED indicates that the FlexLogic™ operand serving as an Alarm switch has
operated. Latching of the indicator depends on the selected protection function. A
Reset command must be initiated to allow the latch to be reset.
• PICKUP:
This LED indicates that at least one element is picked up. This indicator is never
latched.
• TEST MODE*
This LED indicates that the relay has been set into Test Mode.
* Reserved for future release.
• MESSAGE
This LED indicates the presence of Target Messages detected by the relay.
Breaker status indication is based on the breaker's 52a and 52b contacts. With both
contacts wired to the relay and configured, closed breaker status is determined by closed
52a contact and opened 52b contact. Vice-versa the open breaker status is determined by
opened 52a contact and closed 52b contact. If both 52a and 52b contacts are open, due
to a breaker being racked out from the switchgear, both the Breaker Open and Breaker
Closed LED Indicators will be off.
The Event Cause indicators in the first column are described as follows:
Events Cause LEDs are turned ON or OFF by protection elements that have their respective
target settings selected as either "Self-Reset" or "Latched". If a protection element target
setting is "Self-Reset", then the corresponding Event Cause LEDs remain ON as long as the
operate operand associated with the element remains asserted. If a protection element
target setting is "Latched", then the corresponding Event Cause LEDs turn ON when the
operate operand associated with the element is asserted and will remain ON until the
RESET button on the front panel is pressed after the operand is reset.
Support for applying a customized label beside every LED is provided. Default labels are
shipped in the label package of every 845 together with custom templates. The default
labels can be replaced by user-printed labels. User customization of LED operation has
maximum benefit in installations where languages other than English are used to
communicate with operators.
For LED and Pushbutton programming details, please refer to Section 4: Setpoints > Device
> Front Panel.
The next figure shows the icons available on the front screen. For descriptions of these
screen icons see the following tables.
FRONT CONTROL PANEL INTERFACE
3–7