GE GEK 106168E manual Time Synchronization, Configurable Inputs and Outputs, Function

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2. OPERATION LOGIC

2.4.2 TIME SYNCHRONIZATION.

The DBF system includes an input for time synchronization. This input requires the connection of a device to supply a demodulated IRIG-B output. In this way coordinated universal time is measured to a high degree of accuracy and makes possible to tag events generated by the unit with a resolution of one millisecond.

The use of this input makes it possible to correlate data obtained from different units thanks to synchronization with GPS satellites. In this way it is possible to obtain very useful information for analysis, cross- referencing the information provided by different units for a given incident.

Alternatively, it is possible to synchronize units by means of communications, using the GE-LOCAL communications software, or manually by means of the HMI. If the IRIG-B input is used it has priority over time setting by communications, since the time read by IRIG-B is much more accurate.

2.4.3 CONFIGURABLE INPUTS AND OUTPUTS

2.4.3.1 Digital Inputs

The DBF system has 6 digital inputs (two groups of 3 inputs with one common in each group). The inputs can be configured by the user by means of the GE-INTRO configuration program. Using the optional expansion board it is possible to increase the number of inputs up to a total of 14 (2 groups of 3 inputs with one common in each group and 4 groups of 2 inputs with one common in each group). See the external connections diagram for additional reference.

One of the following meanings can be assigned to any input: (For more detail about the configuration of the inputs, see GE-INTRO Instruction Book).

Function	P/L
Unused input
50BF Initiate A	L
50BF Initiate B	L
50BF Initiate C	L
3P BF Initiate	L
52a pole A	L
52a pole B	L
52a pole C	L
52b pole A	L
52b pole B	L
52b pole C	L
Latching Relays Reset	P
External Trigger	P
Active Table Select 0	L
Active Table Select 1	L

(L)indicates Level input

(P)indicates Pulse input

GEK-106168E

DBF Breaker Failure Protection

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Contents GE Power Management 3KRQHHVFULSWLRQ0DQXDO*RI.\RXUFRGHTXHVWLRQ Ruvxjjhvwlrqd Page Table of Contents Installation and Maintenance List of Figures Rear View 226B7412 SheetDBF Breaker Failure Protection GEK-106168E General Description Protection∙ Breaker internal arc detection Monitoring AnalysisDBF Breaker Failure Protection GEK-106168E Digital Signal Input # Terminals Protection FunctionsOvercurrent Units Low-Level Overcurrent Breaker Failure Unit 50BF 1PReset of Latching Relays Ground Overcurrent Breaker Failure UnitBreaker Failure without current or very low current Breaker Arc Detection DeviceInternal Protection Status Signals Monitoring and Recording FunctionsMeasurement Associated Breaker StatusGroup Status Comment Optional Exp. Board Optional Exp.Boar Latched#2 Closed Optional Exp. Board Latched#1Closed Internal Communication Status Signals LED Left Column Right Column Circuit Breaker Breaking Capacity MonitoringAnalysis Functions BUILT-IN SELF-CHECKING UnitEvent Recorder OscillographyEvents to Trigger Oscillography Tables of Settings ControlTable Selection Active Table INPUT-1 INPUT-0Function Configurable Inputs and OutputsTime Synchronization Outputs MAN-MACHINE Interface HMI Remote Communications Breaker Setting Group Active table setting groupCommon to all tables Range Default Step Oscillography Mask Independent for each table Range Default Step 50BF SettingsInternal Arc Settings Functions PermittedComments on Settings DBF Breaker Failure Protection GEK-106168E Ranges Models DBF Phase Model ListDBF GroundElectrical Technical CharacteristicsMechanical Test Standard Class CommunicationsStandards DBF Breaker Failure Protection GEK-106168E Physical Description CaseElectrical Connections Internal ConstructionDBF Breaker Failure Protection GEK-106168E CPU Board Operating TheoryMagnetic Module Power Supply Keyboard and DisplayPanel Insulation Tests Connections and Necessary EquipmentVisual Inspection Power Supply Relay SettingIndicators Communications IRIG-B Synchronizing Input InputsDigital Inputs Functions 1 50BF 1P Unit Test2 50BF 3P Unit Test Neutral Overcurrent Unit Test Internal ARC Test4 3P no I Function DBF Breaker Failure Protection GEK-106168E Timing Measurement Relay Measurement TestsCurrent Measurement DBF Breaker Failure Protection GEK-106168E CONNECTION-TO-GROUND and Disturbances Suppression InstallationMaintenance DBF Breaker Failure Protection GEK-106168E Keyboard and Display DBF General ElectricMenu Tree SETINF ACTSettings Group SET KEY View Settings ProtectionModify Settings Protection View Protection SettingsConfirm Setting OUT Range Level Valid RangeInformation Group INF KEY StatusControl Group ACT KEY SET DATE/TIMESingle KEY Menu Configuration Menu DBF Breaker Failure Protection GEK-106168E Figures Breaker Failure Logic 189C4114 Sheet External Connections 189C4114 Sheet Front View 226B7412 H9 Rear View 226B7412H10 Dimensions Diagram 226B6086H10 Panel Drilling 226B6086H10 RS232 Connection DBF Relay to PC