GE Multilin D30 Line Distance Protection System 5-1555 SETTINGS 5.6 GROUPED ELEMENTS5e) PHASE DIRECTIONAL OVERCURRENT (ANSI 67P, IEC PDOC/PTOC)PATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) PHASE CURRENT PHASE DIRECTIONAL 1(2)The phase directional elements (one for each of phases A, B, and C) determine the phase current flow direction for steadystate and fault conditions and can be used to control the operation of the phase overcurrent elements via the BLOCK inputsof these elements.Figure 5–78: PHASE A DIRECTIONAL POLARIZATIONThis element is intended to apply a block signal to an overcurrent element to prevent an operation when current is flowingin a particular direction. The direction of current flow is determined by measuring the phase angle between the current fromthe phase CTs and the line-line voltage from the VTs, based on the 90° or quadrature connection. If there is a requirementto supervise overcurrent elements for flows in opposite directions, such as can happen through a bus-tie breaker, twophase directional elements should be programmed with opposite element characteristic angle (ECA) settings. PHASE DIRECTIONAL 1PHASE DIR 1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE PHASE DIR 1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2MESSAGE PHASE DIR 1 BLOCK:OffRange: FlexLogic™ operandMESSAGE PHASE DIR 1ECA: 30Range: 0 to 359° in steps of 1MESSAGE PHASE DIR POL V1THRESHOLD: 0.700 puRange: 0.000 to 3.000 pu in steps of 0.001MESSAGE PHASE DIR 1 BLOCKWHEN V MEM EXP: NoRange: No, YesMESSAGE PHASE DIR 1TARGET: Self-resetRange: Self-reset, Latched, DisabledMESSAGE PHASE DIR 1EVENTS: DisabledRange: Disabled, Enabled827800A2.CDRVBGVCGVAG(Faulted) IA ECAset at 30°ECA = Element Characteristic Angle at 30°IA = operating currentPhasors for Phase A Polarization:VPol = VBC (1/_ECA) = polarizing voltage×Fault angleset at 60° LagVAG (Unfaulted)OUTPUTS01VBCVBCVPol+90°–90°
