GE Multilin N60 Network Stability and Synchrophasor Measurement System 5-1155 SETTINGS 5.5 FLEXLOGIC™5Figure 5–41: FLEXELEMENT™ SCHEME LOGICThe FLEXELEMENT 1 +IN setting specifies the first (non-inverted) input to the FlexElement™. Zero is assumed as the input ifthis setting is set to “Off”. For proper operation of the element at least one input must be selected. Otherwise, the elementwill not assert its output operands.This FLEXELEMENT 1 –IN setting specifies the second (inverted) input to the FlexElement™. Zero is assumed as the input ifthis setting is set to “Off”. For proper operation of the element at least one input must be selected. Otherwise, the elementwill not assert its output operands. This input should be used to invert the signal if needed for convenience, or to make theelement respond to a differential signal such as for a top-bottom oil temperature differential alarm. The element will notoperate if the two input signals are of different types, for example if one tries to use active power and phase angle to buildthe effective operating signal.The element responds directly to the differential signal if the FLEXELEMENT 1 INPUT MODE setting is set to “Signed”. The ele-ment responds to the absolute value of the differential signal if this setting is set to “Absolute”. Sample applications for the“Absolute” setting include monitoring the angular difference between two phasors with a symmetrical limit angle in bothdirections; monitoring power regardless of its direction, or monitoring a trend regardless of whether the signal increases ofdecreases.The element responds directly to its operating signal – as defined by the FLEXELEMENT 1 +IN, FLEXELEMENT 1 –IN and FLEX-ELEMENT 1 INPUT MODE settings – if the FLEXELEMENT 1 COMP MODE setting is set to “Level”. The element responds to therate of change of its operating signal if the FLEXELEMENT 1 COMP MODE setting is set to “Delta”. In this case the FLEXELE-MENT 1 dt UNIT and FLEXELEMENT 1 dt settings specify how the rate of change is derived.The FLEXELEMENT 1 DIRECTION setting enables the relay to respond to either high or low values of the operating signal. Thefollowing figure explains the application of the FLEXELEMENT 1 DIRECTION, FLEXELEMENT 1 PICKUP and FLEXELEMENT 1 HYS-TERESIS settings.842004A3.CDRFLEXELEMENT 1FUNCTION:SETTINGEnabled = 1SETTINGSFLEXELEMENT 1 INPUTMODE:FLEXELEMENT 1 COMPMODE:FLEXELEMENT 1DIRECTION:FLEXELEMENT 1 PICKUP:FLEXELEMENT 1 dt UNIT:FLEXELEMENT 1 dt:RUNFLEXELEMENT 1 +IN:SETTINGSActual Value FLEXLOGIC OPERANDSFxE 1 DPOFxE 1 OPFxE 1 PKPFLEXELEMENT 1 -IN:Actual Value+-FlexElement 1 OpSigACTUAL VALUEDisabled = 0FLEXELEMENT 1 BLK:SETTINGOff = 0ANDt PKPt RSTSETTINGSFLEXELEMENT 1 RSTDELAY:FLEXELEMENT 1 PKPDELAY:FLEXELEMENT 1 INPUTHYSTERESIS:
