GE Multilin g60

5-244 G60 Generator Protection System GE Multilin
5.7 CONTROL ELEMENTS 5 SETTINGS
5
Figure 5–137: VT FUSE FAIL SCHEME LOGIC
827093AN.CDR
FUSE
FAIL
FAUL T
AND
AND
AND
AND
SET
RESET
Reset-dominant
Latch
AND
AND
AND
AND
AND
OR
OR
OR
OR
Latch
SET
Reset-dominant
RESET
Function
SETTING
Disabled = 0
Enabled = 1
SOURCE 1
V_2
V_1
I_1
COMPARATORS
Run
V_1<0.05pu
Run
V_2 > 0.1 pu
Run
I_1 > 0.075 pu
Run
V_1<0.80pu
Run
I_1<0.05pu
SRC1 50DD OP
FLEXLOGIC OPERANDS
2cycles
20 cycles
SRC1 VT FUSE FAIL OP
FLEXLOGIC OPERANDS
SRC1 VT FUSE FAIL DPO
SRC1 VT FUSE FAIL VOL LOSS
FLEXLOGIC OPERAND
TIMER
OPEN POLE OP
The OPEN POLE OP operand is applicable
to the D60, L60, and L90 only.
Neutral Wire Open Detect
SETTING
Disabled = 0
Enabled = 1
AND
SRC1 3V0 3rd Harmonic
FLEX-ANALOG
SRC1 VT NEU WIRE OPEN
FLEXLOGIC OPERAND
3V_0(3rd Harmonic)
SOURCE
5cycles
0
TIMER
0
20 cycles
TIMER
SETTING
Run
3V_0 3rd Harm>setting
3 HARM PKP
AND
Note 3V_0 is the sample summation
of Va, Vb, and Vc.
AND
OR