GE Multilin L60 Line Phase Comparison Relay 5-995 SETTINGS 5.5 GROUPED ELEMENTS5• POS SEQ di/dt FDH PICKUP: This setting controls pickup of the high set stage of the element used to control the tripoperation. Nominal current of the phase CT bank of the relay is 1pu.• POS SEQ di/dt FDH SEAL-IN: This setting defines seal-in time of the function. To equalize the response between allterminals of the line, the timer is started at the rising edge of the raw di / dt condition. In this way, the fault detectorsreset approximately at the same time at all line terminals, regardless of responses of individual raw conditions poten-tially different at different line terminals.• POS SEQ FDH SUPV: This setting provides seal-in control of the FDH function for the symmetrical external three-phase faults starting as non-symmetrical defined by the POS SEQ DI/DT FDH SEAL-IN setting time. The overreaching dis-tance function should typically be assigned with this setting.• POS SEQ di/dt BLK: Note that the fault detector is hard-wired to the 87PC scheme. It can be disabled permanentlyusing the function setting, or blocked temporarily using this block setting. Select a FlexLogic™ operand that, ifasserted, should block this fault detector.• POS SEQ di/dt FD TARGET: This setting controls targets of the function. These targets operate independently fromthe 87PC targets.• POS SEQ di/dt FD EVENTS: This setting controls event recording of the function. These events are logged indepen-dently from the 87PC events.Figure 5–42: POSITIVE-SEQUENCE CURRENT RATE OF CHANGE FAULT DETECTOR LOGICg) CHARGE CURRENT COMPENSATIONPATH: SETTINGS ÖØ GROUPED ELEMENTS Ö PHASE COMPARISON ELEMENTS ÖØ CHARGE CURRENT COMPENSATION• CHARGING CURRENT COMPENSATN: This setting enables/disables the charging current calculations and correc-tions of the mixed current used as an operating quantity for fault detectors and square pulses. The voltage signalsused for charging current compensation are taken from source 3 or 4 assigned with the three-phase voltage bank onthe L5 voltage bank. As such, it's critical to ensure that three-phase line voltage is assigned to this source and voltagebank settings are entered correctly. Half (or one-third for the three-terminal line, as defined by the 87PC SCHEMESELECT setting) of the line charging current is subtracted from the line current. The following diagram shows possibleconfigurations. CHARGE CURRENT COMPENSATIONCHARGE CURRENTCOMPENSATN: DisabledRange: Disabled, EnabledMESSAGE CHARGE COMPENST BLK:OffRange: any FlexLogic™ operandMESSAGE POS SEQ CAPACITIVEREACTANCE: 0.100 KΩRange: 0.100 to 65.535 kΩ in steps of 0.001MESSAGE ZERO SEQ CAPACITIVEREACTANCE: 0.100 KΩRange: 0.100 to 65.535 kΩ in steps of 0.001831801A1.CDRFAST MEASUREMENTSF1 PHASE CT BANK:Pos-seq current, I_1L1 PHASE CT BANK:Pos-seq current, I_1| I_1 - I_1* |(breaker 1)| I_1 - I_1* |(breaker 2)SETTINGSPOS SEQ di/dtFDL PICKUP:> FDL PICKUPPOS SEQ di/dtFDH PICKUP:>FDH PICKUP> FDL PICKUP> FDH PICKUPOR87PC dI1/dt FDH OPHardwired to the87PC functionRUNANDEnabled = 1Off = 0SETTINGSPOS SEQ di/dtFD FUNCTION:POS SEQ di/dtBLK:(*) value delayedby 0.5 cycleOR0t DPOTIMERSPOS SEQ di/dtFDL SEAL-IN:0t DPO87PC dI1/dt FDL OPFLEXLOGIC OPERANDSFLEXLOGIC OPERANDSPOS SEQ di/dtFDH SEAL-IN:ORSETTINGSPOS SEQ FDHSUPV:Off = 0AND
