GE Multilin F60 Feeder Protection System 5-1775 SETTINGS 5.6 GROUPED ELEMENTS5c) PHASE TIME OVERCURRENT (ANSI 51P, IEC PTOC)PATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) PHASE CURRENT PHASE TOC1(4)The phase time overcurrent element can provide a desired time-delay operating characteristic versus the applied current orbe used as a simple definite time element. The phase current input quantities may be programmed as fundamental phasormagnitude or total waveform RMS magnitude as required by the application.Two methods of resetting operation are available: “Timed” and “Instantaneous” (see the Inverse TOC Curve Characteristicssection earlier for details on curve setup, trip times, and reset operation). When the element is blocked, the time accumula-tor will reset according to the reset characteristic. For example, if the element reset characteristic is set to “Instantaneous”and the element is blocked, the time accumulator will be cleared immediately.The PHASE TOC1 PICKUP setting can be dynamically reduced by a voltage restraint feature (when enabled). This is accom-plished via the multipliers (Mvr) corresponding to the phase-phase voltages of the voltage restraint characteristic curve(see the figure below); the pickup level is calculated as ‘Mvr’ times the PHASE TOC1 PICKUP setting. If the voltage restraintfeature is disabled, the pickup level always remains at the setting value. PHASE TOC1PHASE TOC1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE PHASE TOC1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4MESSAGE PHASE TOC1INPUT: PhasorRange: Phasor, RMSMESSAGE PHASE TOC1PICKUP: 1.000 puRange: 0.000 to 30.000 pu in steps of 0.001MESSAGE PHASE TOC1CURVE: IEEE Mod InvRange: See Overcurrent Curve Types tableMESSAGE PHASE TOC1TD MULTIPLIER: 1.00Range: 0.00 to 600.00 in steps of 0.01MESSAGE PHASE TOC1RESET: InstantaneousRange: Instantaneous, TimedMESSAGE PHASE TOC1 VOLTAGERESTRAINT: DisabledRange: Disabled, EnabledMESSAGE PHASE TOC1 BLOCK A:OffRange: FlexLogic operandMESSAGE PHASE TOC1 BLOCK B:OffRange: FlexLogic operandMESSAGE PHASE TOC1 BLOCK C:OffRange: FlexLogic operandMESSAGE PHASE TOC1TARGET: Self-resetRange: Self-reset, Latched, DisabledMESSAGE PHASE TOC1EVENTS: DisabledRange: Disabled, Enabled
