GE L90 Instruction Manual page 165
Line differential relay
ur series
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- Communications manual (532 pages) ,
- Instruction manual (470 pages)
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5 SETTINGS
b) CURRENT DIFFERENTIAL
!"
PATH: SETTINGS
GROUPED ELEMENTS
# CURRENT
# DIFFERENTIAL
MESSAGE
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•
CURRENT DIFF SIGNAL SOURCE 1: Selects the first source for the current differential element local operating cur-
rent. If more than one source is configured, other source currents are internally matched to the source assigned with
this setting, which is the always the reference source for the current differential element.
•
CURRENT DIFF SIGNAL SOURCE 2: Selects the second source for current differential function for applications
where more than one set of CT circuitry is connected directly to L90.
•
CURRENT DIFF SIGNAL SOURCE 3: Selects the third source for the current differential function for applications
where more than two sets of CT circuitry are connected directly to L90.
•
CURRENT DIFF SIGNAL SOURCE 4: Selects the fourth source for the current differential function for applications
where four sets of CT circuitry are connected directly to L90.
•
CURRENT DIFF BLOCK: Selects 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.
GE Multilin
!
!
SETTING GROUP 1(6)
LINE DIFFERENTIAL...
CURRENT DIFF
FUNCTION: Disabled
CURRENT DIFF SIGNAL
SOURCE 1: SRC 1
CURRENT DIFF SIGNAL
SOURCE 2: None
CURRENT DIFF SIGNAL
SOURCE 3: None
CURRENT DIFF SIGNAL
SOURCE 4: None
CURRENT DIFF BLOCK:
Off
CURRENT DIFF
PICKUP: 0.20 pu
CURRENT DIFF
CT TAP 1: 1.00
CURRENT DIFF
CT TAP 2: 1.00
CURRENT DIFF
RESTRAINT 1: 30%
CURRENT DIFF
RESTRAINT 2: 50%
CURRENT DIFF
BREAK PT:
1.0 pu
CURRENT DIFF
DTT: Enabled
CURRENT DIFF KEY
DTT: Off
CURRENT DIFF
TARGET: Self-reset
CURRENT DIFF
EVENTS: Disabled
L90 Line Differential Relay
5.5 GROUPED ELEMENTS
!
CURRENT DIFFERENTIAL
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
Range: None, SRC 1, SRC 2, SRC 3, SRC 4
Range: None, SRC 1, SRC 2, SRC 3, SRC 4
Range: None, SRC 1, SRC 2, SRC 3, SRC 4
Range: FlexLogic™ operand
Range: 0.10 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
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5
5-75
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