4-14 N60 Network Stability and Synchrophasor Measurement System GE Multilin4.3 FACEPLATE INTERFACE 4 HUMAN INTERFACES44.3.2 LED INDICATORSa) ENHANCED FACEPLATEThe enhanced front panel display provides five columns of LED indicators. The first column contains 14 status and eventcause LEDs, and the next four columns contain the 48 user-programmable LEDs.The RESET key is used to reset any latched LED indicator or target message, once the condition has been cleared (theselatched conditions can also be reset via the SETTINGS ÖØ INPUT/OUTPUTS ÖØ RESETTING menu). The RS232 port isintended for connection to a portable PC.The USER keys are used by the breaker control feature.Figure 4–17: TYPICAL LED INDICATOR PANEL FOR ENHANCED FACEPLATEThe status indicators in the first column are described below.• IN SERVICE: This LED indicates that control power is applied, all monitored inputs, outputs, and internal systems areOK, and that the device has been programmed.• TROUBLE: This LED indicates that the relay has detected an internal problem.• TEST MODE: This LED indicates that the relay is in test mode.• TRIP: This LED indicates that the FlexLogic™ operand serving as a trip switch has operated. This indicator alwayslatches; 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. This indicator isnever latched.• PICKUP: This LED indicates that an element is picked up. This indicator is never latched.The event cause indicators in the first column are described below. These indicate the input type that was involved in a con-dition detected by an element that is operated or has a latched flag waiting to be reset.• 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 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 involved.The 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 label pack-age of every N60, 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 used tocommunicate with operators. Refer to the User-programmable LEDs section in chapter 5 for the settings used to programthe operation of the LEDs on these panels.842811A1.CDR
