GE L90 Instruction Manual page 204

5.5 GROUPED ELEMENTS
SETTING
PHASE TOC1
FUNCTION:
Disabled=0
Enabled=1
SETTING
PHASE TOC1
BLOCK-A :
Off=0
5
SETTING
PHASE TOC1
BLOCK-B:
Off=0
SETTING
PHASE TOC1
BLOCK-C:
Off=0
SETTING
PHASE TOC1
SOURCE:
A
B
C
Seq=ABC Seq=ACB
RUN
Set
VAB VAC
Calculate
Multiplier
RUN
Set
VBC VBA
Calculate
Multiplier
RUN
Set
VCA VCB
Calculate Multiplier
SETTING
PHASE TOC1 VOLT
RESTRAINT:
Enabled
5-114
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.1 0.2 0.3
Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage
Figure 5–65: PHASE TOC VOLTAGE RESTRAINT CHARACTERISTIC
MULTIPLY INPUTS
Set Pickup
Multiplier-Phase A
Set Pickup
Multiplier-Phase B
Set Pickup
Multiplier-Phase C
Figure 5–66: PHASE TOC1 SCHEME LOGIC
L90 Line Differential Relay
0.4 0.5 0.6 0.7 0.8 0.9
SETTING
PHASE TOC1
INPUT:
PHASE TOC1
PICKUP:
PHASE TOC1
CURVE:
PHASE TOC1
TD MULTIPLIER:
PHASE TOC1
RESET:
AND
RUN
A PICKUP
t
AND
RUN
B PICKUP
t
AND
RUN
C PICKUP
t
5 SETTINGS
1.0
818784A4.CDR
FLEXLOGIC OPERAND
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
OR
PHASE TOC1 PKP
OR
PHASE TOC1 OP
AND PHASE TOC1 DPO
GE Multilin
827072A4.CDR