5-154 D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUALGROUPED ELEMENTS CHAPTER 5: SETTINGS5If the device incorrectly switches to group 1 after power cycling, upgrade the firmware to version 7.31 or later to correctthis issue.5.7.3 Line pickupSETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) LINE PICKUPThe line pickup feature uses a combination of undercurrent and undervoltage to identify a line that has been de-energized(line end open). Alternately assign a FlexLogic operand to the TERMINAL OPEN setting that specifies the terminal status.Three instantaneous overcurrent elements are used to identify a previously de-energized line that has been closed onto afault. Faults other than close-in faults can be identified satisfactorily with the distance elements.Co-ordination features are included to ensure satisfactory operation when high-speed automatic reclosure (AR) isemployed. The AR CO-ORD DELAY setting allows the overcurrent setting to be below the expected load current seen afterreclose. Co-ordination is achieved by all of the LINE PICKP UV elements resetting and blocking the trip path before the ARCO-ORD DELAY times out. The AR CO-ORD BYPASS setting is normally enabled. It is disabled if high speed autoreclosure isimplemented. LINE PICKUP LINE PICKUPFUNCTION: DisabledRange: Disabled, Enabled LINE PICKUP SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2 PHASE IOC LINEPICKUP: 1.000 puRange: 0.000 to 30.000 pu in steps of 0.001 LINE PICKUP UV PKP:0.700 puRange: 0.000 to 3.000 pu in steps of 0.001 LINE END OPEN PICKUPDELAY: 0.150 sRange: 0.000 to 65.535 s in steps of 0.001 LINE END OPEN RESETDELAY: 0.090 sRange: 0.000 to 65.535 s in steps of 0.001 LINE PICKUP OV PKPDELAY: 0.040 sRange: 0.000 to 65.535 s in steps of 0.001 AR CO-ORD BYPASS:EnabledRange: Disabled, Enabled AR CO-ORD PICKUPDELAY: 0.045 sRange: 0.000 to 65.535 s in steps of 0.001 AR CO-ORD RESETDELAY: 0.005 sRange: 0.000 to 65.535 s in steps of 0.001 TERMINAL OPEN:OffRange: FlexLogic operand AR ACCELERATE:OffRange: FlexLogic operand LINE PICKUP DISTANCETRIP: EnabledRange: Disabled, Enabled LINE PICKUP BLOCK:OffRange: FlexLogic operand LINE PICKUPTARGET: Self-resetRange: Self-reset, Latched, Disabled LINE PICKUPEVENTS: DisabledRange: Disabled, Enabled
