CHAPTER 4: INTERFACES FRONT PANEL INTERFACEC60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL 4-394• TROUBLE — Indicates that the relay has detected an internal problem. Check the self-test messages outlined at theend of the Commands and Targets chapter, and view the event records under Actual Values > Records. For a beta /pre-release, this LED is always on.• TEST MODE — Indicates that the relay is in test mode. For information, see the Test Mode section in the Settingschapter.• TRIP — Indicates that the selected FlexLogic operand serving as a trip input has operated. Set the operand underSettings > Product Setup > User-Programmable LEDs > Trip & Alarm LEDs. This indicator latches; initiate the resetcommand to reset the latch.• ALARM — Indicates that the FlexLogic operand serving as an alarm switch has operated. Set the operand underSettings > Product Setup > User-Programmable LEDs > Trip & Alarm LEDs. This indicator never latches.• PICKUP — Indicates that an element is picked up. This indicator never latches.The event-cause indicators in the first column are as follows.Event-cause LEDs are below the status LEDs. They are turned on or off by protection elements that have their respectivetarget setting selected as either “Enabled” or “Latched.” If a protection element target setting is “Enabled,” then thecorresponding event-cause LEDs remain on as long as the operand associated with the element remains asserted. If aprotection element target setting is “Latched,” then the corresponding event-cause LEDs turn on when the operateoperand associated with the element is asserted and remains on until the RESET button on the front panel is pressed afterthe operand is reset.All elements that are able to discriminate faulted phases can independently turn off or on the phase A, B, or C LEDs. Thisincludes phase instantaneous overcurrent, phase undervoltage, and so on. This means that the phase A, B, and C operateoperands for individual protection elements are ORed to turn on or off the phase A, B, or C LEDs.• VOLTAGE — This LED indicates voltage was involved• CURRENT — This LED indicates current was involved• FREQUENCY — This LED indicates frequency was involved• OTHER — This LED indicates a composite function was involvedThis LED indicates a composite function was involved• PHASE A — This LED indicates phase A was involved• PHASE B — This LED indicates phase B was involved• PHASE C — This LED indicates phase C was involved• NEUTRAL/GROUND — This LED indicates that neutral or ground was involvedThe user-programmable LEDs consist of 48 amber LED indicators in four columns. The operation of these LEDs is user-defined. Support for applying a customized label beside every LED is provided. Default labels are shipped in the labelpackage of every C60, together with custom templates. The default labels can be replaced by user-printed labels.User customization of LED operation is of maximum benefit in installations where languages other than English are usedto communicate with operators. See the User-Programmable LEDs section in chapter 5 for the settings used to programthe operation of the LEDs on these panels.4.2.4.2 Standard front panelThe standard front panel consists of three panels with LED indicators, keys, and a communications port. The RESET key isused to reset any latched LED indicator or target message, once the condition has been cleared (these latched conditionscan also be reset via the SETTINGS INPUT/OUTPUTS RESETTING menu). The RS232 port is for connection to acomputer.The USER keys are used by the breaker control feature.
