GE F60 - Page 412

5-280 F60 Feeder Protection System GE Multilin
5.7 CONTROL ELEMENTS 5 SETTINGS
5
Figure 5–132: BROKEN CONDUCTOR DETECTION LOGIC
SETTINGS
BROKEN CONDUCTOR 1
FUNCTION:
Enabled = 1
BROKEN CONDCT 1 BLK:
Off = 0
AND
SETTINGS
BROKEN CONDUCTOR 1
SOURCE:
I2
SETTING
Run
0
2 cyc
FLEXLOGIC OPERAND
BROKEN CONDUCT 1 OP
FLEXLOGIC OPERAND
BROKEN CONDUCT 1 PKP
832030A1.cdr
I1
Ia Ib
Ic
|I1 > I1 MIN
|Ia| < I1 MIN |Ib| < I1 MIN
|Ic| < I1 MIN
Ic
|Ia’| - |Ia| > 0.05 pu |Ib’| - |Ib| > 0.05 pu
|Ic’| - |Ic| > 0.05 pu
Where I’ is four cycles old
BROKEN CONDUCTOR 1 I1 MIN:
AND AND AND
OR
OR
AND
One phase current
loss detection
0
t
PKP
SETTING
BROKEN CONDUCTOR 1 I1 MAX:
SETTINGS
Run
BROKEN CONDUCTOR 1 I2/I1 RATIO:
|I1 | < I1 MAX
|I2| / |I1| > RATIO
BROKEN CONDUCTOR 1 I1 MAX: