GE t60 Instruction Manual page 394

5.7 CONTROL ELEMENTS
SETTI G
Function
Disabled = 0
Enabled = 1
SOURCE 1
V_2
V_1
I_1
FLEXLOGIC OPERA DS
SRC1 50DD OP
OPEN POLE OP
The OPEN POLE OP operand is applicable
to the D60, L60, and L90 onl .
5
SETTI G
Neutral Wire Open Detect
Disabled = 0
Enabled = 1
SOURCE
3V_0(3rd Harmonic)
Note 3V_0 is the sample summation
of Va, Vb, and Vc.
5-270
CO PARATORS
Run
V_2 > 0.1 pu
Run
OR
V_1 < 0.05 pu
Run AND
I_1 > 0.075 pu
Run
TI ER
V_1 < 0.80 pu
2 c cles
Run
AND
I_1 < 0.05 pu
AND
OR
AND
AND
SETTI G
3 HARM PKP
Run
3V_0 3rd Harm>setting
AND
Figure 5–150: VT FUSE FAIL SCHEME LOGIC
T60 Transformer Protection System
AND
OR
AND
AND
OR
FUSE
FAIL
AND
20 c cles
TI ER
5 c cles
AND
0
OR
TI ER
0
20 c cles
AND
5 SETTINGS
Reset-dominant
SET
FAULT
Latch
RESET
SET
FLEXLOGIC OPERA DS
Latch SRC1 VT FUSE FAIL OP
SRC1 VT FUSE FAIL DPO
RESET
Reset-dominant
FLEXLOGIC OPERA D
SRC1 VT FUSE FAIL VOL LOSS
FLEXLOGIC OPERA D
SRC1 VT NEU WIRE OPEN
FLEX-A ALOG
SRC1 3V0 3rd Harmonic
827093AN.CDR
GE Multilin