Current Differential - GE UR Series Instruction Manual

5.5 GROUPED ELEMENTS
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PATH: SETTINGS GROUPED ELEMENTS
„
CURRENT
„
DIFFERENTIAL
5
CURRENT 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 and
remote 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)
5-54
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SETTING GROUP 1(8)
CURRENT DIFF
FUNCTION: Disabled
CURRENT DIFF
MESSAGE
SIGNAL SOURCE: SRC 1
CURRENT DIFF BLOCK:
MESSAGE
Off
CURRENT DIFF
MESSAGE
PICKUP: 0.20 pu
CURRENT DIFF
MESSAGE
CT TAP 1: 1.00
CURRENT DIFF
MESSAGE
CT TAP 2: 1.00
CURRENT DIFF
MESSAGE
RESTRAINT 1: 30%
CURRENT DIFF
MESSAGE
RESTRAINT 2: 50%
CURRENT DIFF
MESSAGE
BREAK PT:
CURRENT DIFF
MESSAGE
DTT: Enabled
CURRENT DIFF KEY
MESSAGE
DTT: Off
CURRENT DIFF
MESSAGE
TARGET: Self-reset
CURRENT DIFF
MESSAGE
EVENTS: Disabled
L90 Line Differential Relay
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LINE DIFFERENTIAL...
Range: Disabled, Enabled
Range: SRC 1, SRC 2,..., SRC 6
Range: FlexLogic™ operand
Range: 0.20 to 4.00 pu in steps of 0.01
Range: 0.20 to 5.00 in steps of 0.01
Range: 0.20 to 5.00 in steps of 0.01
Range: 1 to 50% in steps of 1
Range: 1 to 70% in steps of 1
Range: 0.0 to 20.0 pu in steps of 0.1
1.0 pu
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5 SETTINGS

5.5.4 CURRENT DIFFERENTIAL

CURRENT DIFFERENTIAL
GE Power Management