GE Digital Energy L30, Instruction Manual, Page: 277 / 644

GE Multilin L30 Line Current Differential System 5-151
5 SETTINGS 5.6 GROUPED ELEMENTS
5
Figure 5–62: PHASE TIME OVERCURRENT VOLTAGE RESTRAINT CHARACTERISTIC
Figure 5–63: PHASE TIME OVERCURRENT 1 SCHEME LOGIC
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
0
818784A4.CDR
Multiplier
for
Pickup
Current
Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage
SETTING
SETTING
SETTING
SETTING
SETTING
MULTIPLY INPUTS
FLEXLOGIC OPERAND
SETTING
PHASE TOC1
FUNCTION:
PHASE TOC1
BLOCK-A :
PHASE TOC1
BLOCK-C:
PHASE TOC1
BLOCK-B:
PHASE TOC1 VOLT
RESTRAINT:
PHASE TOC1 A PKP
PHASE TOC1 A DPO
PHASE TOC1 A OP
PHASE TOC1 B PKP
PHASE TOC1 B DPO
PHASE TOC1 B OP
PHASE TOC1 C PKP
PHASE TOC1 C DPO
PHASE TOC1 C OP
PHASE TOC1 PKP
PHASE TOC1 OP
PHASE TOC1
SOURCE:
PHASE TOC1
RESET:
PHASE TOC1
CURVE:
PHASE TOC1
PICKUP:
PHASE TOC1
INPUT:
I A
Seq=ABC Seq=ACB
Set
Multiplier
Set
Multiplier
Set
Multiplier
Set Pickup
Multiplier-Phase A
Calculate
Calculate
Calculate
Set Pickup
Multiplier-Phase B
Set Pickup
Multiplier-Phase C
RUN
I B
VAB VAC
RUN
I C
VBC VBA
VCA VCB
RUN
Off=0
Off=0
Off=0
Enabled
Enabled=1
Disabled=0
OR
AND
AND
AND
OR
827072A4.CDR
PHASE TOC1
TD MULTIPLIER:
RUN
RUN
RUN
I A PICKUP
t
t
t
I B PICKUP
I C PICKUP
SETTING
PHASE TOC1 DPO AND