GE L30 User Manual

GE Multilin L30 Line Current Differential System 5-161
5 SETTINGS 5.6 GROUPED ELEMENTS
5
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
CURRENT DIFF SIGNAL SOURCE 1 to CURRENT DIFF SIGNAL SOURCE 4 settings. This
source is mandatory and is assigned with the SYSTEM SETUP  SIGNAL SOURCES  SOURCE 1 menu.
• 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
prim_rem
/CT
prim_loc
for local and remote termi-
MESSAGE
CURRENT DIFF BLOCK:
Off
Range: FlexLogic operand
MESSAGE
CURRENT DIFF
PICKUP: 0.20 pu
Range: 0.10 to 4.00 pu in steps of 0.01
MESSAGE
CURRENT DIFF
CT TAP 1: 1.00
Range: 0.20 to 5.00 in steps of 0.01
MESSAGE
CURRENT DIFF
CT TAP 2: 1.00
Range: 0.20 to 5.00 in steps of 0.01
MESSAGE
CURRENT DIFF
RESTRAINT 1: 30%
Range: 1 to 50% in steps of 1
MESSAGE
CURRENT DIFF
RESTRAINT 2: 50%
Range: 1 to 70% in steps of 1
MESSAGE
CURRENT DIFF
BREAK PT: 1.0 pu
Range: 0.0 to 20.0 pu in steps of 0.1
MESSAGE
INRUSH INHIBIT MODE:
Disabled
Range: Disabled, Per phase, 2-out-of-3, Average
MESSAGE
INRUSH INHIBIT
LEVEL: 20% fo
Range: 1.0 to 40.0% f
0
in steps of 0.1
MESSAGE
CURRENT DIFF GND
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
CURRENT DIFF GND
PICKUP: 0.10 pu
Range: 0.05 to 1.00 pu in steps of 0.01
MESSAGE
CURRENT DIFF GND
RESTRAINT: 25%
Range: 1 to 50% in steps of 1
MESSAGE
CURRENT DIFF GND
DELAY: 0.10 s
Range: 0.00 to 5.00 s in steps of 0.01
MESSAGE
CURRENT DIFF DTT:
Enabled
Range: Disabled, Enabled
MESSAGE
CURRENT DIFF KEY DTT:
Off
Range: FlexLogic operand
MESSAGE
CURRENT DIFF
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
CURRENT DIFF
EVENTS: Disabled
Range: Disabled, Enabled

GE L30 Specifications

General

Brand	GE
Model	L30
Category	Relays
Language	English