GE UR T60 Instruction Manual page 325

5 SETTINGS
Figure 5–95: PHASE TIME OVERCURRENT VOLTAGE RESTRAINT CHARACTERISTIC
SETTING
PHASE TOC1
FUNCTION:
Disabled=0
Enabled=1
SETTING
PHASE TOC1
BLOCK-A :
Off=0
SETTING
PHASE TOC1
BLOCK-B:
Off=0
SETTING
PHASE TOC1
BLOCK-C:
Off=0
SETTING
PHASE TOC1
SOURCE:
IA
IB
IC
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
Figure 5–96: PHASE TIME OVERCURRENT 1 SCHEME LOGIC
GE Multilin
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 0.4
Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage
MULTIPLY INPUTS
Set Pickup
Multiplier-Phase A
Set Pickup
Multiplier-Phase B
Set Pickup
Multiplier-Phase C
T60 Transformer Protection System
0.5 0.6 0.7 0.8 0.9 1.0
818784A4.CDR
SETTING
PHASE TOC1
INPUT:
PHASE TOC1
PICKUP:
PHASE TOC1
CURVE:
PHASE TOC1
TD MULTIPLIER:
PHASE TOC1
RESET:
AND
RUN
IA PICKUP
t
AND
RUN
IB PICKUP
t
AND
RUN
IC PICKUP
t
5.6 GROUPED ELEMENTS
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
827072A4.CDR
5-187
5