GE t60 Instruction Manual page 298

5.6 GROUPED ELEMENTS
35
30
25
20
15
10
5
0
5
Figure 5–88: PHASE INSTANTANEOUS OVERCURRENT TIMING CURVES
ETT NG
PHASE IOC1
FUNCTION:
Enabled = 1
Disabled = 0
ETT NG
PHASE IOC1
SOURCE:
IA
IB
IC
ETT NG
PHASE IOC1
BLOCK-A:
Off = 0
ETT NG
PHASE IOC1
BLOCK-B:
Off = 0
ETT NG
PHASE IOC1
BLOCK-C:
Off = 0
Figure 5–89: PHASE INSTANTANEOUS OVERCURRENT 1 SCHEME LOGIC
5-166
1.05 1.1 1.2
ETT NG
PHASE IOC1
PICKUP:
AND RUN
IA PICKUP
AND RUN
IB PICKUP
AND RUN
IC PICKUP
T60 Transformer Protection System
1.5 2 5 10
Multiple of pickup
ETT NG
PHASE IOC1
PICKUPDELAY:
PHASE IOC1 RESET
DELAY:
t
PKP
t
RST
t
PKP
t
RST
t
PKP
t
RST
5 SETTINGS
Maximum
Minimum
15 20
843807A1.CDR
FLEXLOG C
OPE AND
PHASE IOC1 A PKP
PHASE IOC1 A DPO
PHASE IOC1 B PKP
PHASE IOC1 B DPO
PHASE IOC1 C PKP
PHASE IOC1 C DPO
PHASE IOC1 A OP
PHASE IOC1 B OP
PHASE IOC1 C OP
OR PHASE IOC1 PKP
OR PHASE IOC1 OP
AND PHASE IOC1 DPO
827033A6.VSD
GE Multilin