GE L30 Instruction Manual page 301
Line current differential
system
ur series
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Also See for L30:
- Instruction manual (702 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (630 pages)
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5 SETTINGS
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The following settings are available for current differential protection.
•
CURRENT DIFF SIGNAL SOURCE 1: This setting selects the first source for the current differential element local
operating current. If more than one source is configured, the other source currents are scaled to the CT with the maxi-
mum primary current assigned by the
source is mandatory and is assigned with the
•
CURRENT DIFF BLOCK: This setting selects a FlexLogic operand to block the operation of the current differential ele-
ment.
•
CURRENT DIFF PICKUP: This setting is used to select current differential pickup value.
•
CURRENT DIFF CT TAP 1 and CURRENT DIFF CT TAP 2: These settings adapt the remote terminal 1 or 2 (commu-
nication channel 1 and 2 respectively) CT ratio to the local ratio if the CT ratios for the local and remote terminals differ.
In 2-terminal, two-channel applications use the same value for both TAP 1 and TAP 2 settings, and in 3-terminals
accordingly remote 1 and 2 CTs. The setting value is determined by CT
GE Multilin
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
INRUSH INHIBIT MODE:
Disabled
INRUSH INHIBIT
LEVEL: 20% fo
CURRENT DIFF GND
FUNCTION: Disabled
CURRENT DIFF GND
PICKUP: 0.10 pu
CURRENT DIFF GND
RESTRAINT: 25%
CURRENT DIFF GND
DELAY: 0.10 s
CURRENT DIFF DTT:
Enabled
CURRENT DIFF KEY DTT:
Off
CURRENT DIFF
TARGET: Self-reset
CURRENT DIFF
EVENTS: Disabled
CURRENT DIFF SIGNAL SOURCE 1
SYSTEM SETUP
SIGNAL SOURCES
L30 Line Current Differential System
5.6 GROUPED ELEMENTS
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, Per phase, 2-out-of-3, Average
Range: 1.0 to 40.0% f
in steps of 0.1
0
Range: Disabled, Enabled
Range: 0.05 to 1.00 pu in steps of 0.01
Range: 1 to 50% in steps of 1
Range: 0.00 to 5.00 s in steps of 0.01
Range: Disabled, Enabled
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
to
CURRENT DIFF SIGNAL SOURCE 4
menu.
SOURCE 1
/ CT
for local and remote termi-
prim_rem
prim_loc
5
settings. This
5-161
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