5-54L90 Line Differential RelayGE Power Management5.5 GROUPED ELEMENTS 5 SETTINGS55.5.4 CURRENT DIFFERENTIALPATH: SETTINGS Ø GROUPED ELEMENTS Ö SETTING GROUP 1(8) Ö LINE DIFFERENTIAL... Ö CURRENT DIFFERENTIALCURRENT DIFF FUNCTION:This setting is used to Enable/Disable operation of current differential element.CURRENT DIFF SIGNAL SOURCE:This setting is used to select the source for the local operating current of the current differential element.CURRENT DIFF BLOCK:This setting is used to select a FlexLogic™ Operand to block the operation of the current differential element.CURRENT DIFF PICKUP:This setting is used to select current differential pickup value.CURRENT DIFF CT TAP 1:This setting is used to adapt remote terminal 1 (communication channel 1) CT ratio to the local one if CT ratios for local andremote 1 terminals are different. Value of TAP 1 setting is determined as CTprim_rem / CTprim_loc for local and remote ter-minal CTs (where CTprim_rem / CTprim_loc is referred to as CT primary rated current). See the CURRENT DIFFEREN-TIAL SETTINGS application example in Chapter 9.CURRENT DIFF CT TAP 2:As above for remote terminal 2 (communication channel 2) CURRENT DIFFERENTIALCURRENT DIFFFUNCTION: DisabledRange: Disabled, EnabledMESSAGE CURRENT DIFFSIGNAL SOURCE: SRC 1Range: SRC 1, SRC 2,..., SRC 6MESSAGE CURRENT DIFF BLOCK:OffRange: FlexLogic™ operandMESSAGE CURRENT DIFFPICKUP: 0.20 puRange: 0.20 to 4.00 pu in steps of 0.01MESSAGE CURRENT DIFFCT TAP 1: 1.00Range: 0.20 to 5.00 in steps of 0.01MESSAGE CURRENT DIFFCT TAP 2: 1.00Range: 0.20 to 5.00 in steps of 0.01MESSAGE CURRENT DIFFRESTRAINT 1: 30%Range: 1 to 50% in steps of 1MESSAGE CURRENT DIFFRESTRAINT 2: 50%Range: 1 to 70% in steps of 1MESSAGE CURRENT DIFFBREAK PT: 1.0 puRange: 0.0 to 20.0 pu in steps of 0.1MESSAGE CURRENT DIFFDTT: EnabledRange: Disabled, EnabledMESSAGE CURRENT DIFF KEYDTT: OffRange: FlexLogic™ operandMESSAGE CURRENT DIFFTARGET: Self-resetRange: Self-reset, Latched, DisabledMESSAGE CURRENT DIFFEVENTS: DisabledRange: Disabled, Enabled
