GE C30 Instruction Manual page 107

CHAPTER 4: INTERFACES
Status indicators
• IN SERVICE — Indicates that control power is applied, all monitored inputs/outputs and internal systems are fine, the
relay has been programmed
• TROUBLE — Indicates that the relay has detected an internal problem
• TEST MODE — Indicates that the relay is in test mode. For more information, see the Test Mode section in the Settings
chapter.
• TRIP — Indicates that the selected FlexLogic operand serving as a Trip switch has operated. This indicator always
latches; the reset command must be initiated to allow the latch to be reset.
• ALARM — Indicates that the selected FlexLogic operand serving as an Alarm switch has operated. This indicator is
never latched.
• PICKUP — Indicates that an element is picked up. This indicator is never latched.
Event-cause indicators
Event-cause LEDs are turned on or off by protection elements that have their respective target setting selected as either
"Enabled" or "Latched." If a protection element target setting is "Enabled," then the corresponding event cause LEDs
remain on as long as operate the 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 remain on until the
All elements that are able to discriminate faulted phases can independently turn off or on the phase A, B, or C LEDs. This
includes phase instantaneous overcurrent, phase undervoltage, and so on. This means that the phase A, B, and C operate
operands for individual protection elements are ORed to turn on or off the phase A, B, or C LEDs.
• VOLTAGE — Not used
• CURRENT — Not used
• FREQUENCY — Not used
• OTHER — Indicates a digital element was involved
• PHASE A — Not used
• PHASE B — Not used
• PHASE C — Not used
• NEUTRAL/GROUND — Not used
User-programmable indicators
The second and third panels provide 48 amber LED indicators whose operation is controlled by the user. Support for
applying a customized label beside every LED is provided.
User customization of LED operation is of maximum benefit in installations where languages other than English are used
to communicate with operators. See the User-programmable LEDs section in chapter 5 for the settings used to program
the operation of the LEDs on these panels.
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
Figure 4-20: LED panel 1
STATUS EVENT CAUSE
IN SERVICE VOLTAGE
TROUBLE CURRENT
TEST MODE FREQUENCY
TRIP OTHER
ALARM PHASE A
PICKUP PHASE B
PHASE C
NEUTRAL/GROUND
button on the front panel is pressed after the operand is reset.
RESET
FRONT PANEL INTERFACE
RESET
USER 1
USER 2
USER 3
842781A1.CDR
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